Data Tables, Graphs, and Variable Selection: Which table or graph correctly identifies variables, labels units, uses an appropriate scale, and reveals the relevant astronomical pattern?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.011 - Data Tables, Graphs, and Variable Selection: NGSS Science and Engineering Practices; CCC: Patterns, Systems and System Models, Scale/Proportion/Quantity; CCSS RST.9-10.1-10, RST.11-12.1-10, WHST.9-10.1-9, WHST.11-12.1-9; CCSS Math HSN-Q.A.1-3, HSS-ID; ISTE 1.3, 1.5, 1.6; TEKS §112.48(c)(1)-(4); FL CPALMS Astronomy 2001350 scientific practices; VA AS.1; MA STE high-school science and engineering practices.

Measurement Uncertainty and Significant Figures: Which result correctly reflects instrument precision, uncertainty, significant figures, and the difference between accuracy and precision?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.012 - Measurement Uncertainty and Significant Figures: NGSS Science and Engineering Practices; CCC: Patterns, Systems and System Models, Scale/Proportion/Quantity; CCSS RST.9-10.1-10, RST.11-12.1-10, WHST.9-10.1-9, WHST.11-12.1-9; CCSS Math HSN-Q.A.1-3, HSS-ID; ISTE 1.3, 1.5, 1.6; TEKS §112.48(c)(1)-(4); FL CPALMS Astronomy 2001350 scientific practices; VA AS.1; MA STE high-school science and engineering practices.

Signal, Noise, Outliers, and Reliability: Which interpretation best distinguishes a meaningful astronomical signal from noise, an outlier, or an artifact and proposes the strongest reliability check?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.013 - Signal, Noise, Outliers, and Reliability: NGSS Science and Engineering Practices; CCC: Patterns, Systems and System Models, Scale/Proportion/Quantity; CCSS RST.9-10.1-10, RST.11-12.1-10, WHST.9-10.1-9, WHST.11-12.1-9; CCSS Math HSN-Q.A.1-3, HSS-ID; ISTE 1.3, 1.5, 1.6; TEKS §112.48(c)(1)-(4); FL CPALMS Astronomy 2001350 scientific practices; VA AS.1; MA STE high-school science and engineering practices.

Statistics and Error Bars: Given repeated measurements, which summary correctly uses mean, median, spread, uncertainty, or error bars to compare astronomical data sets? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.014 - Statistics and Error Bars: NGSS Science and Engineering Practices; CCC: Patterns, Systems and System Models, Scale/Proportion/Quantity; CCSS RST.9-10.1-10, RST.11-12.1-10, WHST.9-10.1-9, WHST.11-12.1-9; CCSS Math HSN-Q.A.1-3, HSS-ID; ISTE 1.3, 1.5, 1.6; TEKS §112.48(c)(1)-(4); FL CPALMS Astronomy 2001350 scientific practices; VA AS.1; MA STE high-school science and engineering practices.

Models, Simulations, Sources, and Reproducibility: Which option best evaluates a model or simulation for assumptions and limits while also selecting credible sources, transparent methods, and reproducible data practices?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.015 - Models, Simulations, Sources, and Reproducibility: NGSS Science and Engineering Practices; CCC: Patterns, Systems and System Models, Scale/Proportion/Quantity; CCSS RST.9-10.1-10, RST.11-12.1-10, WHST.9-10.1-9, WHST.11-12.1-9; CCSS Math HSN-Q.A.1-3, HSS-ID; ISTE 1.3, 1.5, 1.6; TEKS §112.48(c)(1)-(4); FL CPALMS Astronomy 2001350 scientific practices; VA AS.1; MA STE high-school science and engineering practices.

Astronomy Across Ancient Cultures: Which comparison best describes how different ancient cultures recorded celestial patterns for calendars, agriculture, ceremony, prediction, or navigation?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.016 - Astronomy Across Ancient Cultures: NGSS SEP: Obtaining/Evaluating/Communicating Information and Engaging in Argument from Evidence; CCC: Patterns, Systems and System Models; CCSS RST.11-12.1,2,6,8,9; WHST.11-12.2,7,8,9; ISTE 1.3, 1.6; TEKS §112.48(c)(4)-(5); FL SC.912.E.5 / CPALMS 2001350; VA AS.2; MA STE HS-ESS1 connections.

Archaeoastronomical Structures and Alignments: Which evidence best supports the conclusion that a structure or site was intentionally aligned with a solstice, equinox, lunar event, or stellar rising?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.017 - Archaeoastronomical Structures and Alignments: NGSS SEP: Obtaining/Evaluating/Communicating Information and Engaging in Argument from Evidence; CCC: Patterns, Systems and System Models; CCSS RST.11-12.1,2,6,8,9; WHST.11-12.2,7,8,9; ISTE 1.3, 1.6; TEKS §112.48(c)(4)-(5); FL SC.912.E.5 / CPALMS 2001350; VA AS.2; MA STE HS-ESS1 connections.

Early Instruments: Gnomons, Sundials, and Astrolabes: Which instrument best measures the stated solar or stellar quantity, and which limitation affects the resulting observation?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.018 - Early Instruments: Gnomons, Sundials, and Astrolabes: NGSS SEP: Obtaining/Evaluating/Communicating Information and Engaging in Argument from Evidence; CCC: Patterns, Systems and System Models; CCSS RST.11-12.1,2,6,8,9; WHST.11-12.2,7,8,9; ISTE 1.3, 1.6; TEKS §112.48(c)(4)-(5); FL SC.912.E.5 / CPALMS 2001350; VA AS.2; MA STE HS-ESS1 connections.

Measuring Earth: Eratosthenes: Given shadow angles and a baseline distance, which reasoning or calculation correctly estimates Earth’s circumference?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.019 - Measuring Earth: Eratosthenes: NGSS SEP: Obtaining/Evaluating/Communicating Information and Engaging in Argument from Evidence; CCC: Patterns, Systems and System Models; CCSS RST.11-12.1,2,6,8,9; WHST.11-12.2,7,8,9; ISTE 1.3, 1.6; TEKS §112.48(c)(4)-(5); FL SC.912.E.5 / CPALMS 2001350; VA AS.2; MA STE HS-ESS1 connections.

Estimating Earth-Moon-Sun Sizes and Distances: Which geometric observation or proportional argument best explains how early astronomers estimated relative sizes and distances in the Earth-Moon-Sun system?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.020 - Estimating Earth-Moon-Sun Sizes and Distances: NGSS SEP: Obtaining/Evaluating/Communicating Information and Engaging in Argument from Evidence; CCC: Patterns, Systems and System Models; CCSS RST.11-12.1,2,6,8,9; WHST.11-12.2,7,8,9; ISTE 1.3, 1.6; TEKS §112.48(c)(4)-(5); FL SC.912.E.5 / CPALMS 2001350; VA AS.2; MA STE HS-ESS1 connections.

The Geocentric Model and Epicycles: Which feature of the geocentric model was intended to account for observed planetary motion, and where did the model’s predictive complexity arise?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.021 - The Geocentric Model and Epicycles: NGSS SEP: Obtaining/Evaluating/Communicating Information and Engaging in Argument from Evidence; CCC: Patterns, Systems and System Models; CCSS RST.11-12.1,2,6,8,9; WHST.11-12.2,7,8,9; ISTE 1.3, 1.6; TEKS §112.48(c)(4)-(5); FL SC.912.E.5 / CPALMS 2001350; VA AS.2; MA STE HS-ESS1 connections.

The Heliocentric Model: Which observation or pattern is more simply explained by a Sun-centered model than by a basic Earth-centered model?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.022 - The Heliocentric Model: NGSS SEP: Obtaining/Evaluating/Communicating Information and Engaging in Argument from Evidence; CCC: Patterns, Systems and System Models; CCSS RST.11-12.1,2,6,8,9; WHST.11-12.2,7,8,9; ISTE 1.3, 1.6; TEKS §112.48(c)(4)-(5); FL SC.912.E.5 / CPALMS 2001350; VA AS.2; MA STE HS-ESS1 connections.

Tycho Brahe and Precision Observation: Which conclusion best explains why Tycho Brahe’s precise, long-term positional measurements were essential to later orbital models?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.023 - Tycho Brahe and Precision Observation: NGSS SEP: Obtaining/Evaluating/Communicating Information and Engaging in Argument from Evidence; CCC: Patterns, Systems and System Models; CCSS RST.11-12.1,2,6,8,9; WHST.11-12.2,7,8,9; ISTE 1.3, 1.6; TEKS §112.48(c)(4)-(5); FL SC.912.E.5 / CPALMS 2001350; VA AS.2; MA STE HS-ESS1 connections.

Kepler and Elliptical Orbits: Which evidence led Kepler to replace circular planetary paths with ellipses, and how did that change predictive accuracy?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.024 - Kepler and Elliptical Orbits: NGSS SEP: Obtaining/Evaluating/Communicating Information and Engaging in Argument from Evidence; CCC: Patterns, Systems and System Models; CCSS RST.11-12.1,2,6,8,9; WHST.11-12.2,7,8,9; ISTE 1.3, 1.6; TEKS §112.48(c)(4)-(5); FL SC.912.E.5 / CPALMS 2001350; VA AS.2; MA STE HS-ESS1 connections.

Galileo and Telescopic Evidence: Which telescopic observation - such as phases of Venus, moons of Jupiter, sunspots, or lunar terrain - most directly challenged an older cosmological claim?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.025 - Galileo and Telescopic Evidence: NGSS SEP: Obtaining/Evaluating/Communicating Information and Engaging in Argument from Evidence; CCC: Patterns, Systems and System Models; CCSS RST.11-12.1,2,6,8,9; WHST.11-12.2,7,8,9; ISTE 1.3, 1.6; TEKS §112.48(c)(4)-(5); FL SC.912.E.5 / CPALMS 2001350; VA AS.2; MA STE HS-ESS1 connections.

Newton’s Synthesis of Earth and Sky: Which statement best explains how Newton connected falling objects and planetary orbits through the same laws of motion and gravity?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.026 - Newton’s Synthesis of Earth and Sky: NGSS SEP: Obtaining/Evaluating/Communicating Information and Engaging in Argument from Evidence; CCC: Patterns, Systems and System Models; CCSS RST.11-12.1,2,6,8,9; WHST.11-12.2,7,8,9; ISTE 1.3, 1.6; TEKS §112.48(c)(4)-(5); FL SC.912.E.5 / CPALMS 2001350; VA AS.2; MA STE HS-ESS1 connections.

Global and Diverse Contributions to Astronomy: Which pairing correctly matches an astronomer, culture, or scientific community with a contribution to observation, mathematics, instrumentation, or theory? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.027 - Global and Diverse Contributions to Astronomy: NGSS SEP: Obtaining/Evaluating/Communicating Information and Engaging in Argument from Evidence; CCC: Patterns, Systems and System Models; CCSS RST.11-12.1,2,6,8,9; WHST.11-12.2,7,8,9; ISTE 1.3, 1.6; TEKS §112.48(c)(4)-(5); FL SC.912.E.5 / CPALMS 2001350; VA AS.2; MA STE HS-ESS1 connections.

Women and Historically Underrepresented Astronomers: Which contribution correctly illustrates how astronomers from historically excluded groups advanced stellar classification, cosmology, computing, instrumentation, or space science?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.028 - Women and Historically Underrepresented Astronomers: NGSS SEP: Obtaining/Evaluating/Communicating Information and Engaging in Argument from Evidence; CCC: Patterns, Systems and System Models; CCSS RST.11-12.1,2,6,8,9; WHST.11-12.2,7,8,9; ISTE 1.3, 1.6; TEKS §112.48(c)(4)-(5); FL SC.912.E.5 / CPALMS 2001350; VA AS.2; MA STE HS-ESS1 connections.

Astronomy and Astrology: Which criterion best distinguishes astronomy as a testable science from astrology as a belief system lacking reliable predictive evidence?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.029 - Astronomy and Astrology: NGSS SEP: Obtaining/Evaluating/Communicating Information and Engaging in Argument from Evidence; CCC: Patterns, Systems and System Models; CCSS RST.11-12.1,2,6,8,9; WHST.11-12.2,7,8,9; ISTE 1.3, 1.6; TEKS §112.48(c)(4)-(5); FL SC.912.E.5 / CPALMS 2001350; VA AS.2; MA STE HS-ESS1 connections.

Scientific Revolutions, Technology, and Society: Which example best shows how improved instruments, data, or social needs changed an astronomical model and influenced navigation, timekeeping, communication, or culture?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.030 - Scientific Revolutions, Technology, and Society: NGSS SEP: Obtaining/Evaluating/Communicating Information and Engaging in Argument from Evidence; CCC: Patterns, Systems and System Models; CCSS RST.11-12.1,2,6,8,9; WHST.11-12.2,7,8,9; ISTE 1.3, 1.6; TEKS §112.48(c)(4)-(5); FL SC.912.E.5 / CPALMS 2001350; VA AS.2; MA STE HS-ESS1 connections.

The Celestial Sphere Model: Which statement best uses the celestial sphere as a useful positional model while recognizing that stars lie at different distances? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.031 - The Celestial Sphere Model: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; DCI ESS1.A/B; SEP: Developing and Using Models, Analyzing and Interpreting Data; CCC: Patterns; CCSS RST.11-12.7; CCSS Math HSG-SRT, HSN-Q; TEKS §112.48(c)(6)-(7); FL SC.912.E.5.1,3,10; VA AS.5(b-d); MA STE HS-ESS1.

Horizon, Zenith, Nadir, and Meridian: Given a sky diagram, which labels correctly identify the horizon, zenith, nadir, meridian, and cardinal directions? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.032 - Horizon, Zenith, Nadir, and Meridian: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; DCI ESS1.A/B; SEP: Developing and Using Models, Analyzing and Interpreting Data; CCC: Patterns; CCSS RST.11-12.7; CCSS Math HSG-SRT, HSN-Q; TEKS §112.48(c)(6)-(7); FL SC.912.E.5.1,3,10; VA AS.5(b-d); MA STE HS-ESS1.

Angular Measurement in the Sky: Given an apparent separation or angular diameter, which estimate correctly uses degrees, arcminutes, arcseconds, or a hand-at-arm's-length approximation?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.033 - Angular Measurement in the Sky: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; DCI ESS1.A/B; SEP: Developing and Using Models, Analyzing and Interpreting Data; CCC: Patterns; CCSS RST.11-12.7; CCSS Math HSG-SRT, HSN-Q; TEKS §112.48(c)(6)-(7); FL SC.912.E.5.1,3,10; VA AS.5(b-d); MA STE HS-ESS1.

Constellations, Asterisms, and Boundaries: Which statement correctly distinguishes an official constellation region from an asterism and explains why star patterns are viewpoint dependent?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.034 - Constellations, Asterisms, and Boundaries: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; DCI ESS1.A/B; SEP: Developing and Using Models, Analyzing and Interpreting Data; CCC: Patterns; CCSS RST.11-12.7; CCSS Math HSG-SRT, HSN-Q; TEKS §112.48(c)(6)-(7); FL SC.912.E.5.1,3,10; VA AS.5(b-d); MA STE HS-ESS1.

Circumpolar Stars and Latitude: Which sky path is circumpolar for a given latitude, and how would the visible circumpolar region change if the observer moved north or south?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.035 - Circumpolar Stars and Latitude: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; DCI ESS1.A/B; SEP: Developing and Using Models, Analyzing and Interpreting Data; CCC: Patterns; CCSS RST.11-12.7; CCSS Math HSG-SRT, HSN-Q; TEKS §112.48(c)(6)-(7); FL SC.912.E.5.1,3,10; VA AS.5(b-d); MA STE HS-ESS1.

Daily Apparent Motion of the Sky: Which explanation best connects Earth's rotation to the apparent east-to-west motion of the Sun, Moon, planets, and stars? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.036 - Daily Apparent Motion of the Sky: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; DCI ESS1.A/B; SEP: Developing and Using Models, Analyzing and Interpreting Data; CCC: Patterns; CCSS RST.11-12.7; CCSS Math HSG-SRT, HSN-Q; TEKS §112.48(c)(6)-(7); FL SC.912.E.5.1,3,10; VA AS.5(b-d); MA STE HS-ESS1.

The Celestial Poles and Celestial Equator: Which diagram correctly relates Earth’s rotation axis and equator to the celestial poles and celestial equator?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.037 - The Celestial Poles and Celestial Equator: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; DCI ESS1.A/B; SEP: Developing and Using Models, Analyzing and Interpreting Data; CCC: Patterns; CCSS RST.11-12.7; CCSS Math HSG-SRT, HSN-Q; TEKS §112.48(c)(6)-(7); FL SC.912.E.5.1,3,10; VA AS.5(b-d); MA STE HS-ESS1.

Annual Motion of the Sun and the Ecliptic: Which sky pattern results from Earth’s revolution and places the Sun along the ecliptic against changing background constellations?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.038 - Annual Motion of the Sun and the Ecliptic: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; DCI ESS1.A/B; SEP: Developing and Using Models, Analyzing and Interpreting Data; CCC: Patterns; CCSS RST.11-12.7; CCSS Math HSG-SRT, HSN-Q; TEKS §112.48(c)(6)-(7); FL SC.912.E.5.1,3,10; VA AS.5(b-d); MA STE HS-ESS1.

The Zodiac and Planetary Paths: Which statement correctly explains why the Sun, Moon, and planets usually appear near the ecliptic and zodiac constellations?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.039 - The Zodiac and Planetary Paths: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; DCI ESS1.A/B; SEP: Developing and Using Models, Analyzing and Interpreting Data; CCC: Patterns; CCSS RST.11-12.7; CCSS Math HSG-SRT, HSN-Q; TEKS §112.48(c)(6)-(7); FL SC.912.E.5.1,3,10; VA AS.5(b-d); MA STE HS-ESS1.

Apparent Planetary Motion and Retrograde Loops: Which relative-motion explanation best accounts for a planet’s apparent retrograde loop against the background stars?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.040 - Apparent Planetary Motion and Retrograde Loops: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; DCI ESS1.A/B; SEP: Developing and Using Models, Analyzing and Interpreting Data; CCC: Patterns; CCSS RST.11-12.7; CCSS Math HSG-SRT, HSN-Q; TEKS §112.48(c)(6)-(7); FL SC.912.E.5.1,3,10; VA AS.5(b-d); MA STE HS-ESS1.

Brightness and the Apparent-Magnitude Scale: Given apparent magnitudes, which object appears brighter, and which statement correctly describes the reversed and logarithmic nature of the scale?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.041 - Brightness and the Apparent-Magnitude Scale: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; DCI ESS1.A/B; SEP: Developing and Using Models, Analyzing and Interpreting Data; CCC: Patterns; CCSS RST.11-12.7; CCSS Math HSG-SRT, HSN-Q; TEKS §112.48(c)(6)-(7); FL SC.912.E.5.1,3,10; VA AS.5(b-d); MA STE HS-ESS1.

Using Star Charts and Planispheres: Given a date, time, and observing location, which orientation of a star chart or planisphere correctly predicts the visible sky?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.042 - Using Star Charts and Planispheres: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; DCI ESS1.A/B; SEP: Developing and Using Models, Analyzing and Interpreting Data; CCC: Patterns; CCSS RST.11-12.7; CCSS Math HSG-SRT, HSN-Q; TEKS §112.48(c)(6)-(7); FL SC.912.E.5.1,3,10; VA AS.5(b-d); MA STE HS-ESS1.

Seasonal Constellations: Which explanation best accounts for why different constellations are visible at the same clock time in different seasons?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.043 - Seasonal Constellations: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; DCI ESS1.A/B; SEP: Developing and Using Models, Analyzing and Interpreting Data; CCC: Patterns; CCSS RST.11-12.7; CCSS Math HSG-SRT, HSN-Q; TEKS §112.48(c)(6)-(7); FL SC.912.E.5.1,3,10; VA AS.5(b-d); MA STE HS-ESS1.

Atmospheric Seeing, Extinction, and Refraction: Which atmospheric effect best explains twinkling, horizon reddening, apparent displacement, image blur, or reduced brightness?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.044 - Atmospheric Seeing, Extinction, and Refraction: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; DCI ESS1.A/B; SEP: Developing and Using Models, Analyzing and Interpreting Data; CCC: Patterns; CCSS RST.11-12.7; CCSS Math HSG-SRT, HSN-Q; TEKS §112.48(c)(6)-(7); FL SC.912.E.5.1,3,10; VA AS.5(b-d); MA STE HS-ESS1.

Observing Logs and Field Conditions: Which observing record includes the information needed to compare sightings reliably, including time, location, weather, equipment, target, and uncertainty?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.045 - Observing Logs and Field Conditions: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; DCI ESS1.A/B; SEP: Developing and Using Models, Analyzing and Interpreting Data; CCC: Patterns; CCSS RST.11-12.7; CCSS Math HSG-SRT, HSN-Q; TEKS §112.48(c)(6)-(7); FL SC.912.E.5.1,3,10; VA AS.5(b-d); MA STE HS-ESS1.

Solar Day and Sidereal Day: Which comparison correctly explains why a sidereal day is shorter than a solar day and predicts the daily change in stellar rise times?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.046 - Solar Day and Sidereal Day: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; SEP: Using Mathematics and Computational Thinking, Developing and Using Models; CCC: Patterns, Scale/Proportion/Quantity; CCSS Math HSN-Q, HSF-TF, HSG-SRT; ISTE 1.5; TEKS §112.48(c)(5)(A),(6)(A-B),(9); FL SC.912.E.5.10; VA AS.2(d), AS.5(b-e); MA STE HS-ESS1.

Sidereal, Synodic, and Orbital Periods: Which period describes an object’s motion relative to the stars, and which describes the repeating configuration seen from Earth?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.047 - Sidereal, Synodic, and Orbital Periods: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; SEP: Using Mathematics and Computational Thinking, Developing and Using Models; CCC: Patterns, Scale/Proportion/Quantity; CCSS Math HSN-Q, HSF-TF, HSG-SRT; ISTE 1.5; TEKS §112.48(c)(5)(A),(6)(A-B),(9); FL SC.912.E.5.10; VA AS.2(d), AS.5(b-e); MA STE HS-ESS1.

Tropical and Sidereal Years: Which statement best distinguishes the seasonal year from the orbital period measured relative to distant stars?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.048 - Tropical and Sidereal Years: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; SEP: Using Mathematics and Computational Thinking, Developing and Using Models; CCC: Patterns, Scale/Proportion/Quantity; CCSS Math HSN-Q, HSF-TF, HSG-SRT; ISTE 1.5; TEKS §112.48(c)(5)(A),(6)(A-B),(9); FL SC.912.E.5.10; VA AS.2(d), AS.5(b-e); MA STE HS-ESS1.

Local Solar Time, Standard Time, and UTC: Given longitude and time-zone information, which conversion correctly relates local solar time, standard time, and Coordinated Universal Time? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.049 - Local Solar Time, Standard Time, and UTC: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; SEP: Using Mathematics and Computational Thinking, Developing and Using Models; CCC: Patterns, Scale/Proportion/Quantity; CCSS Math HSN-Q, HSF-TF, HSG-SRT; ISTE 1.5; TEKS §112.48(c)(5)(A),(6)(A-B),(9); FL SC.912.E.5.10; VA AS.2(d), AS.5(b-e); MA STE HS-ESS1.

Julian Dates and Elapsed Time: Given two astronomical observation times, which calculation correctly uses Julian dates or decimal dates to determine elapsed time?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.050 - Julian Dates and Elapsed Time: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; SEP: Using Mathematics and Computational Thinking, Developing and Using Models; CCC: Patterns, Scale/Proportion/Quantity; CCSS Math HSN-Q, HSF-TF, HSG-SRT; ISTE 1.5; TEKS §112.48(c)(5)(A),(6)(A-B),(9); FL SC.912.E.5.10; VA AS.2(d), AS.5(b-e); MA STE HS-ESS1.

Calendars and Leap-Year Rules: Which calendar rule best keeps months and years aligned with lunar phases or seasons, and what mismatch is the rule correcting? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.051 - Calendars and Leap-Year Rules: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; SEP: Using Mathematics and Computational Thinking, Developing and Using Models; CCC: Patterns, Scale/Proportion/Quantity; CCSS Math HSN-Q, HSF-TF, HSG-SRT; ISTE 1.5; TEKS §112.48(c)(5)(A),(6)(A-B),(9); FL SC.912.E.5.10; VA AS.2(d), AS.5(b-e); MA STE HS-ESS1.

The Horizontal Coordinate System: Given an observer and sky position, which altitude and azimuth correctly locate the target relative to the local horizon?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.052 - The Horizontal Coordinate System: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; SEP: Using Mathematics and Computational Thinking, Developing and Using Models; CCC: Patterns, Scale/Proportion/Quantity; CCSS Math HSN-Q, HSF-TF, HSG-SRT; ISTE 1.5; TEKS §112.48(c)(5)(A),(6)(A-B),(9); FL SC.912.E.5.10; VA AS.2(d), AS.5(b-e); MA STE HS-ESS1.

The Equatorial Coordinate System: Which right ascension and declination identify a target independently of the observer’s local horizon at a particular moment?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.053 - The Equatorial Coordinate System: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; SEP: Using Mathematics and Computational Thinking, Developing and Using Models; CCC: Patterns, Scale/Proportion/Quantity; CCSS Math HSN-Q, HSF-TF, HSG-SRT; ISTE 1.5; TEKS §112.48(c)(5)(A),(6)(A-B),(9); FL SC.912.E.5.10; VA AS.2(d), AS.5(b-e); MA STE HS-ESS1.

Ecliptic and Galactic Coordinates: Which coordinate system is most useful for locating an object relative to the ecliptic plane or the Milky Way plane?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.054 - Ecliptic and Galactic Coordinates: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; SEP: Using Mathematics and Computational Thinking, Developing and Using Models; CCC: Patterns, Scale/Proportion/Quantity; CCSS Math HSN-Q, HSF-TF, HSG-SRT; ISTE 1.5; TEKS §112.48(c)(5)(A),(6)(A-B),(9); FL SC.912.E.5.10; VA AS.2(d), AS.5(b-e); MA STE HS-ESS1.

Comparing Coordinate Systems: Which coordinate system is best suited to a stated observing, cataloging, spacecraft, or galactic-structure task, and what is its main limitation?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.055 - Comparing Coordinate Systems: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; SEP: Using Mathematics and Computational Thinking, Developing and Using Models; CCC: Patterns, Scale/Proportion/Quantity; CCSS Math HSN-Q, HSF-TF, HSG-SRT; ISTE 1.5; TEKS §112.48(c)(5)(A),(6)(A-B),(9); FL SC.912.E.5.10; VA AS.2(d), AS.5(b-e); MA STE HS-ESS1.

Hour Angle and Local Sidereal Time: Given right ascension and local sidereal time, which hour angle correctly indicates whether an object is east of, west of, or on the meridian?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.056 - Hour Angle and Local Sidereal Time: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; SEP: Using Mathematics and Computational Thinking, Developing and Using Models; CCC: Patterns, Scale/Proportion/Quantity; CCSS Math HSN-Q, HSF-TF, HSG-SRT; ISTE 1.5; TEKS §112.48(c)(5)(A),(6)(A-B),(9); FL SC.912.E.5.10; VA AS.2(d), AS.5(b-e); MA STE HS-ESS1.

Rise, Transit, and Set Predictions: Given an object’s declination, an observer’s latitude, and time information, which prediction about rising, meridian transit, or setting is correct?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.057 - Rise, Transit, and Set Predictions: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; SEP: Using Mathematics and Computational Thinking, Developing and Using Models; CCC: Patterns, Scale/Proportion/Quantity; CCSS Math HSN-Q, HSF-TF, HSG-SRT; ISTE 1.5; TEKS §112.48(c)(5)(A),(6)(A-B),(9); FL SC.912.E.5.10; VA AS.2(d), AS.5(b-e); MA STE HS-ESS1.

Precession, Nutation, and Coordinate Epochs: Which long-term change requires star coordinates to be referenced to a standard epoch, and how does it alter the celestial poles?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.058 - Precession, Nutation, and Coordinate Epochs: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; SEP: Using Mathematics and Computational Thinking, Developing and Using Models; CCC: Patterns, Scale/Proportion/Quantity; CCSS Math HSN-Q, HSF-TF, HSG-SRT; ISTE 1.5; TEKS §112.48(c)(5)(A),(6)(A-B),(9); FL SC.912.E.5.10; VA AS.2(d), AS.5(b-e); MA STE HS-ESS1.

Celestial Navigation and Position: Which observation of the Sun or a known star, combined with accurate time, can be used to infer latitude or longitude?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.059 - Celestial Navigation and Position: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; SEP: Using Mathematics and Computational Thinking, Developing and Using Models; CCC: Patterns, Scale/Proportion/Quantity; CCSS Math HSN-Q, HSF-TF, HSG-SRT; ISTE 1.5; TEKS §112.48(c)(5)(A),(6)(A-B),(9); FL SC.912.E.5.10; VA AS.2(d), AS.5(b-e); MA STE HS-ESS1.

Atomic Time, GPS, and Astronomical Time Standards: Which explanation best connects atomic clocks, relativistic corrections, leap seconds, and satellite timing to modern navigation and astronomy?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.060 - Atomic Time, GPS, and Astronomical Time Standards: NGSS MS-ESS1-1/3 and HS-ESS1-4 connections; SEP: Using Mathematics and Computational Thinking, Developing and Using Models; CCC: Patterns, Scale/Proportion/Quantity; CCSS Math HSN-Q, HSF-TF, HSG-SRT; ISTE 1.5; TEKS §112.48(c)(5)(A),(6)(A-B),(9); FL SC.912.E.5.10; VA AS.2(d), AS.5(b-e); MA STE HS-ESS1.

Light as Waves and Photons: Which phenomenon is best explained by the wave model of light, which by the photon model, and why are both models useful? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.061 - Light as Waves and Photons: NGSS HS-PS4-1/2/4/5; DCI PS4.A/B; SEP: Using Mathematics and Computational Thinking, Analyzing and Interpreting Data; CCC: Energy and Matter, Patterns; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF; ISTE 1.5; TEKS §112.48(c)(10)(A,C-D),(13)(E); FL SC.912.E.5.8; VA AS.3(a-b); MA STE HS-PS4.

The Electromagnetic Spectrum: Which ordering correctly ranks radio, microwave, infrared, visible, ultraviolet, X-ray, and gamma radiation by wavelength, frequency, or energy?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.062 - The Electromagnetic Spectrum: NGSS HS-PS4-1/2/4/5; DCI PS4.A/B; SEP: Using Mathematics and Computational Thinking, Analyzing and Interpreting Data; CCC: Energy and Matter, Patterns; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF; ISTE 1.5; TEKS §112.48(c)(10)(A,C-D),(13)(E); FL SC.912.E.5.8; VA AS.3(a-b); MA STE HS-PS4.

Wave Speed, Frequency, and Wavelength: Given two of the quantities in c = fλ, which calculation correctly determines the third with consistent units?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.063 - Wave Speed, Frequency, and Wavelength: NGSS HS-PS4-1/2/4/5; DCI PS4.A/B; SEP: Using Mathematics and Computational Thinking, Analyzing and Interpreting Data; CCC: Energy and Matter, Patterns; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF; ISTE 1.5; TEKS §112.48(c)(10)(A,C-D),(13)(E); FL SC.912.E.5.8; VA AS.3(a-b); MA STE HS-PS4.

Photon Energy: Given a frequency or wavelength, which comparison correctly identifies the photon with greater energy? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.064 - Photon Energy: NGSS HS-PS4-1/2/4/5; DCI PS4.A/B; SEP: Using Mathematics and Computational Thinking, Analyzing and Interpreting Data; CCC: Energy and Matter, Patterns; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF; ISTE 1.5; TEKS §112.48(c)(10)(A,C-D),(13)(E); FL SC.912.E.5.8; VA AS.3(a-b); MA STE HS-PS4.

Luminosity, Flux, and the Inverse-Square Law: Given luminosity and distance information, which result correctly predicts received flux or apparent brightness?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.065 - Luminosity, Flux, and the Inverse-Square Law: NGSS HS-PS4-1/2/4/5; DCI PS4.A/B; SEP: Using Mathematics and Computational Thinking, Analyzing and Interpreting Data; CCC: Energy and Matter, Patterns; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF; ISTE 1.5; TEKS §112.48(c)(10)(A,C-D),(13)(E); FL SC.912.E.5.8; VA AS.3(a-b); MA STE HS-PS4.

Blackbody Radiation Curves: Which blackbody curve represents the hotter object, and what do the curve's peak and total area indicate?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.066 - Blackbody Radiation Curves: NGSS HS-PS4-1/2/4/5; DCI PS4.A/B; SEP: Using Mathematics and Computational Thinking, Analyzing and Interpreting Data; CCC: Energy and Matter, Patterns; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF; ISTE 1.5; TEKS §112.48(c)(10)(A,C-D),(13)(E); FL SC.912.E.5.8; VA AS.3(a-b); MA STE HS-PS4.

Wien’s Law: Given a peak wavelength, identify the calculation or inference that correctly estimates an object's temperature or color. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.067 - Wien’s Law: NGSS HS-PS4-1/2/4/5; DCI PS4.A/B; SEP: Using Mathematics and Computational Thinking, Analyzing and Interpreting Data; CCC: Energy and Matter, Patterns; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF; ISTE 1.5; TEKS §112.48(c)(10)(A,C-D),(13)(E); FL SC.912.E.5.8; VA AS.3(a-b); MA STE HS-PS4.

Stefan-Boltzmann Law: Given stellar radius and temperature, predict luminosity comparisons using the dependence on surface area and the fourth power of temperature. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.068 - Stefan-Boltzmann Law: NGSS HS-PS4-1/2/4/5; DCI PS4.A/B; SEP: Using Mathematics and Computational Thinking, Analyzing and Interpreting Data; CCC: Energy and Matter, Patterns; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF; ISTE 1.5; TEKS §112.48(c)(10)(A,C-D),(13)(E); FL SC.912.E.5.8; VA AS.3(a-b); MA STE HS-PS4.

Continuous, Emission, and Absorption Spectra: Which source-and-gas arrangement produces a continuous, emission-line, or absorption-line spectrum?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.069 - Continuous, Emission, and Absorption Spectra: NGSS HS-PS4-1/2/4/5; DCI PS4.A/B; SEP: Using Mathematics and Computational Thinking, Analyzing and Interpreting Data; CCC: Energy and Matter, Patterns; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF; ISTE 1.5; TEKS §112.48(c)(10)(A,C-D),(13)(E); FL SC.912.E.5.8; VA AS.3(a-b); MA STE HS-PS4.

Atomic Energy Levels and Spectral Lines: Which explanation correctly connects photon absorption or emission to electron transitions between quantized atomic energy levels?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.070 - Atomic Energy Levels and Spectral Lines: NGSS HS-PS4-1/2/4/5; DCI PS4.A/B; SEP: Using Mathematics and Computational Thinking, Analyzing and Interpreting Data; CCC: Energy and Matter, Patterns; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF; ISTE 1.5; TEKS §112.48(c)(10)(A,C-D),(13)(E); FL SC.912.E.5.8; VA AS.3(a-b); MA STE HS-PS4.

Chemical Composition from Spectra: Which spectral-line pattern best identifies an element or mixture when compared with laboratory reference wavelengths? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.071 - Chemical Composition from Spectra: NGSS HS-PS4-1/2/4/5; DCI PS4.A/B; SEP: Using Mathematics and Computational Thinking, Analyzing and Interpreting Data; CCC: Energy and Matter, Patterns; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF; ISTE 1.5; TEKS §112.48(c)(10)(A,C-D),(13)(E); FL SC.912.E.5.8; VA AS.3(a-b); MA STE HS-PS4.

The Doppler Effect: Given a shifted spectral line, which conclusion correctly identifies motion toward or away from the observer and estimates relative speed? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.072 - The Doppler Effect: NGSS HS-PS4-1/2/4/5; DCI PS4.A/B; SEP: Using Mathematics and Computational Thinking, Analyzing and Interpreting Data; CCC: Energy and Matter, Patterns; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF; ISTE 1.5; TEKS §112.48(c)(10)(A,C-D),(13)(E); FL SC.912.E.5.8; VA AS.3(a-b); MA STE HS-PS4.

Thermal and Nonthermal Radiation: Which emission pattern is most consistent with thermal radiation, synchrotron radiation, or another nonthermal process?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.073 - Thermal and Nonthermal Radiation: NGSS HS-PS4-1/2/4/5; DCI PS4.A/B; SEP: Using Mathematics and Computational Thinking, Analyzing and Interpreting Data; CCC: Energy and Matter, Patterns; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF; ISTE 1.5; TEKS §112.48(c)(10)(A,C-D),(13)(E); FL SC.912.E.5.8; VA AS.3(a-b); MA STE HS-PS4.

Polarization and Scattering: Which observation of polarization or wavelength-dependent scattering best reveals magnetic fields, dust, surfaces, or atmospheric particles?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.074 - Polarization and Scattering: NGSS HS-PS4-1/2/4/5; DCI PS4.A/B; SEP: Using Mathematics and Computational Thinking, Analyzing and Interpreting Data; CCC: Energy and Matter, Patterns; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF; ISTE 1.5; TEKS §112.48(c)(10)(A,C-D),(13)(E); FL SC.912.E.5.8; VA AS.3(a-b); MA STE HS-PS4.

Multiwavelength Astronomy and Color Composites: Which combination of wavelength bands best reveals the stated physical process, and which interpretation of a false-color composite is scientifically valid?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.075 - Multiwavelength Astronomy and Color Composites: NGSS HS-PS4-1/2/4/5; DCI PS4.A/B; SEP: Using Mathematics and Computational Thinking, Analyzing and Interpreting Data; CCC: Energy and Matter, Patterns; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF; ISTE 1.5; TEKS §112.48(c)(10)(A,C-D),(13)(E); FL SC.912.E.5.8; VA AS.3(a-b); MA STE HS-PS4.

Refracting and Reflecting Telescopes: Which telescope design uses lenses or mirrors, and which advantage or limitation follows from that optical design?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.076 - Refracting and Reflecting Telescopes: NGSS HS-PS4-2/4/5, HS-ETS1-1/2/3/4; DCI PS4.B, ETS1.A-C; SEP: Planning Investigations, Evaluating Designs; CCC: Structure and Function; CCSS RST.11-12.3,7; WHST.11-12.2; ISTE 1.4, 1.5; TEKS §112.48(c)(1)(D),(10); FL SC.912.E.5.8; VA AS.2(f), AS.3(a); MA STE HS-PS4/HS-ETS1.

Aperture and Light-Gathering Power: Given two telescope diameters, which calculation correctly compares their light-gathering power?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.077 - Aperture and Light-Gathering Power: NGSS HS-PS4-2/4/5, HS-ETS1-1/2/3/4; DCI PS4.B, ETS1.A-C; SEP: Planning Investigations, Evaluating Designs; CCC: Structure and Function; CCSS RST.11-12.3,7; WHST.11-12.2; ISTE 1.4, 1.5; TEKS §112.48(c)(1)(D),(10); FL SC.912.E.5.8; VA AS.2(f), AS.3(a); MA STE HS-PS4/HS-ETS1.

Angular Resolution and Diffraction: Which telescope can separate two close sources, and how do aperture and wavelength affect the diffraction limit?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.078 - Angular Resolution and Diffraction: NGSS HS-PS4-2/4/5, HS-ETS1-1/2/3/4; DCI PS4.B, ETS1.A-C; SEP: Planning Investigations, Evaluating Designs; CCC: Structure and Function; CCSS RST.11-12.3,7; WHST.11-12.2; ISTE 1.4, 1.5; TEKS §112.48(c)(1)(D),(10); FL SC.912.E.5.8; VA AS.2(f), AS.3(a); MA STE HS-PS4/HS-ETS1.

Focal Length, F-Ratio, and Field of View: Which optical configuration best matches a stated need for image scale, brightness per pixel, magnification, or field of view?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.079 - Focal Length, F-Ratio, and Field of View: NGSS HS-PS4-2/4/5, HS-ETS1-1/2/3/4; DCI PS4.B, ETS1.A-C; SEP: Planning Investigations, Evaluating Designs; CCC: Structure and Function; CCSS RST.11-12.3,7; WHST.11-12.2; ISTE 1.4, 1.5; TEKS §112.48(c)(1)(D),(10); FL SC.912.E.5.8; VA AS.2(f), AS.3(a); MA STE HS-PS4/HS-ETS1.

Magnification and Useful Power: Given telescope and eyepiece focal lengths, which magnification is correct, and which claim about excessive magnification is valid?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.080 - Magnification and Useful Power: NGSS HS-PS4-2/4/5, HS-ETS1-1/2/3/4; DCI PS4.B, ETS1.A-C; SEP: Planning Investigations, Evaluating Designs; CCC: Structure and Function; CCSS RST.11-12.3,7; WHST.11-12.2; ISTE 1.4, 1.5; TEKS §112.48(c)(1)(D),(10); FL SC.912.E.5.8; VA AS.2(f), AS.3(a); MA STE HS-PS4/HS-ETS1.

Mounts, Tracking, and Earth’s Rotation: Which mount or tracking strategy best keeps a celestial target centered and minimizes field rotation during an exposure?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.081 - Mounts, Tracking, and Earth’s Rotation: NGSS HS-PS4-2/4/5, HS-ETS1-1/2/3/4; DCI PS4.B, ETS1.A-C; SEP: Planning Investigations, Evaluating Designs; CCC: Structure and Function; CCSS RST.11-12.3,7; WHST.11-12.2; ISTE 1.4, 1.5; TEKS §112.48(c)(1)(D),(10); FL SC.912.E.5.8; VA AS.2(f), AS.3(a); MA STE HS-PS4/HS-ETS1.

Detectors: Eye, Film, CCD, and CMOS: Which detector property - such as quantum efficiency, linearity, noise, or dynamic range - best explains its suitability for an observation?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.082 - Detectors: Eye, Film, CCD, and CMOS: NGSS HS-PS4-2/4/5, HS-ETS1-1/2/3/4; DCI PS4.B, ETS1.A-C; SEP: Planning Investigations, Evaluating Designs; CCC: Structure and Function; CCSS RST.11-12.3,7; WHST.11-12.2; ISTE 1.4, 1.5; TEKS §112.48(c)(1)(D),(10); FL SC.912.E.5.8; VA AS.2(f), AS.3(a); MA STE HS-PS4/HS-ETS1.

Photometry and Astronomical Filters: Which filter and comparison-star strategy best measures brightness or color while reducing atmospheric and instrumental effects?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.083 - Photometry and Astronomical Filters: NGSS HS-PS4-2/4/5, HS-ETS1-1/2/3/4; DCI PS4.B, ETS1.A-C; SEP: Planning Investigations, Evaluating Designs; CCC: Structure and Function; CCSS RST.11-12.3,7; WHST.11-12.2; ISTE 1.4, 1.5; TEKS §112.48(c)(1)(D),(10); FL SC.912.E.5.8; VA AS.2(f), AS.3(a); MA STE HS-PS4/HS-ETS1.

Spectrographs and Dispersive Elements: Which arrangement of slit, grating or prism, camera, and detector correctly produces a usable astronomical spectrum?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.084 - Spectrographs and Dispersive Elements: NGSS HS-PS4-2/4/5, HS-ETS1-1/2/3/4; DCI PS4.B, ETS1.A-C; SEP: Planning Investigations, Evaluating Designs; CCC: Structure and Function; CCSS RST.11-12.3,7; WHST.11-12.2; ISTE 1.4, 1.5; TEKS §112.48(c)(1)(D),(10); FL SC.912.E.5.8; VA AS.2(f), AS.3(a); MA STE HS-PS4/HS-ETS1.

Radio Telescopes and Interferometry: Which statement best explains dish size, array baselines, interferometric resolution, and the need to combine signals accurately?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.085 - Radio Telescopes and Interferometry: NGSS HS-PS4-2/4/5, HS-ETS1-1/2/3/4; DCI PS4.B, ETS1.A-C; SEP: Planning Investigations, Evaluating Designs; CCC: Structure and Function; CCSS RST.11-12.3,7; WHST.11-12.2; ISTE 1.4, 1.5; TEKS §112.48(c)(1)(D),(10); FL SC.912.E.5.8; VA AS.2(f), AS.3(a); MA STE HS-PS4/HS-ETS1.

Atmospheric Windows and Observatory Wavelengths: Which wavelength can be observed effectively from the ground, and which generally requires a high-altitude or space-based observatory?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.086 - Atmospheric Windows and Observatory Wavelengths: NGSS HS-PS4-2/4/5, HS-ETS1-1/2/3/4; DCI PS4.B, ETS1.A-C; SEP: Planning Investigations, Evaluating Designs; CCC: Structure and Function; CCSS RST.11-12.3,7; WHST.11-12.2; ISTE 1.4, 1.5; TEKS §112.48(c)(1)(D),(10); FL SC.912.E.5.8; VA AS.2(f), AS.3(a); MA STE HS-PS4/HS-ETS1.

Adaptive Optics and Atmospheric Seeing: Which adaptive-optics measurement and correction process most directly sharpens images blurred by atmospheric turbulence?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.087 - Adaptive Optics and Atmospheric Seeing: NGSS HS-PS4-2/4/5, HS-ETS1-1/2/3/4; DCI PS4.B, ETS1.A-C; SEP: Planning Investigations, Evaluating Designs; CCC: Structure and Function; CCSS RST.11-12.3,7; WHST.11-12.2; ISTE 1.4, 1.5; TEKS §112.48(c)(1)(D),(10); FL SC.912.E.5.8; VA AS.2(f), AS.3(a); MA STE HS-PS4/HS-ETS1.

Signal-to-Noise Ratio and Exposure Planning: Which change in aperture, exposure time, background, or number of images most effectively improves signal-to-noise for the stated target?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.088 - Signal-to-Noise Ratio and Exposure Planning: NGSS HS-PS4-2/4/5, HS-ETS1-1/2/3/4; DCI PS4.B, ETS1.A-C; SEP: Planning Investigations, Evaluating Designs; CCC: Structure and Function; CCSS RST.11-12.3,7; WHST.11-12.2; ISTE 1.4, 1.5; TEKS §112.48(c)(1)(D),(10); FL SC.912.E.5.8; VA AS.2(f), AS.3(a); MA STE HS-PS4/HS-ETS1.

Calibration Frames and Image Reduction: Which bias, dark, or flat-field correction addresses a specified detector artifact, and in what sequence should calibration occur?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.089 - Calibration Frames and Image Reduction: NGSS HS-PS4-2/4/5, HS-ETS1-1/2/3/4; DCI PS4.B, ETS1.A-C; SEP: Planning Investigations, Evaluating Designs; CCC: Structure and Function; CCSS RST.11-12.3,7; WHST.11-12.2; ISTE 1.4, 1.5; TEKS §112.48(c)(1)(D),(10); FL SC.912.E.5.8; VA AS.2(f), AS.3(a); MA STE HS-PS4/HS-ETS1.

Observatory Sites, Robotic Telescopes, and Data Archives: Which site or observing platform best meets requirements for darkness, dryness, stability, wavelength access, automation, or public data availability?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.090 - Observatory Sites, Robotic Telescopes, and Data Archives: NGSS HS-PS4-2/4/5, HS-ETS1-1/2/3/4; DCI PS4.B, ETS1.A-C; SEP: Planning Investigations, Evaluating Designs; CCC: Structure and Function; CCSS RST.11-12.3,7; WHST.11-12.2; ISTE 1.4, 1.5; TEKS §112.48(c)(1)(D),(10); FL SC.912.E.5.8; VA AS.2(f), AS.3(a); MA STE HS-PS4/HS-ETS1.

Mass, Weight, and Inertia: Which statement correctly distinguishes mass, weight, and inertia for an object on Earth, the Moon, or in orbit?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.091 - Mass, Weight, and Inertia: NGSS HS-ESS1-4, HS-PS2-1/4, HS-PS3-1/2; DCI ESS1.B, PS2.B, PS3.A/B; SEP: Mathematical and Computational Thinking, Modeling; CCC: Cause and Effect, Systems; CCSS Math HSN-Q, HSA-CED, HSF-IF, HSF-LE; TEKS §112.48(c)(11)(A); FL SC.912.E.5.6; VA AS.2(e), AS.5(f); MA STE HS-ESS1-4/HS-PS2.

Newton’s Law of Universal Gravitation: Given two masses and their separation, which expression or comparison correctly predicts the gravitational force?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.092 - Newton’s Law of Universal Gravitation: NGSS HS-ESS1-4, HS-PS2-1/4, HS-PS3-1/2; DCI ESS1.B, PS2.B, PS3.A/B; SEP: Mathematical and Computational Thinking, Modeling; CCC: Cause and Effect, Systems; CCSS Math HSN-Q, HSA-CED, HSF-IF, HSF-LE; TEKS §112.48(c)(11)(A); FL SC.912.E.5.6; VA AS.2(e), AS.5(f); MA STE HS-ESS1-4/HS-PS2.

Inverse-Square Gravitational Patterns: If distance changes by a stated factor, which result correctly predicts the corresponding change in gravitational force or field strength? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.093 - Inverse-Square Gravitational Patterns: NGSS HS-ESS1-4, HS-PS2-1/4, HS-PS3-1/2; DCI ESS1.B, PS2.B, PS3.A/B; SEP: Mathematical and Computational Thinking, Modeling; CCC: Cause and Effect, Systems; CCSS Math HSN-Q, HSA-CED, HSF-IF, HSF-LE; TEKS §112.48(c)(11)(A); FL SC.912.E.5.6; VA AS.2(e), AS.5(f); MA STE HS-ESS1-4/HS-PS2.

Newton’s Laws and Orbital Motion: Which force-and-motion explanation best describes why an orbiting object continually falls around, rather than directly into, its primary?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.094 - Newton’s Laws and Orbital Motion: NGSS HS-ESS1-4, HS-PS2-1/4, HS-PS3-1/2; DCI ESS1.B, PS2.B, PS3.A/B; SEP: Mathematical and Computational Thinking, Modeling; CCC: Cause and Effect, Systems; CCSS Math HSN-Q, HSA-CED, HSF-IF, HSF-LE; TEKS §112.48(c)(11)(A); FL SC.912.E.5.6; VA AS.2(e), AS.5(f); MA STE HS-ESS1-4/HS-PS2.

Circular-Orbit Speed and Period: Given orbital radius and central mass, which calculation or trend correctly predicts circular speed or period? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.095 - Circular-Orbit Speed and Period: NGSS HS-ESS1-4, HS-PS2-1/4, HS-PS3-1/2; DCI ESS1.B, PS2.B, PS3.A/B; SEP: Mathematical and Computational Thinking, Modeling; CCC: Cause and Effect, Systems; CCSS Math HSN-Q, HSA-CED, HSF-IF, HSF-LE; TEKS §112.48(c)(11)(A); FL SC.912.E.5.6; VA AS.2(e), AS.5(f); MA STE HS-ESS1-4/HS-PS2.

Kepler’s First Law: Which diagram correctly identifies an elliptical orbit, its foci, periapsis, apoapsis, semimajor axis, and eccentricity?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.096 - Kepler’s First Law: NGSS HS-ESS1-4, HS-PS2-1/4, HS-PS3-1/2; DCI ESS1.B, PS2.B, PS3.A/B; SEP: Mathematical and Computational Thinking, Modeling; CCC: Cause and Effect, Systems; CCSS Math HSN-Q, HSA-CED, HSF-IF, HSF-LE; TEKS §112.48(c)(11)(A); FL SC.912.E.5.6; VA AS.2(e), AS.5(f); MA STE HS-ESS1-4/HS-PS2.

Kepler’s Second Law: Which orbital segment is traversed fastest, and which equal-area statement correctly describes motion over equal times? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.097 - Kepler’s Second Law: NGSS HS-ESS1-4, HS-PS2-1/4, HS-PS3-1/2; DCI ESS1.B, PS2.B, PS3.A/B; SEP: Mathematical and Computational Thinking, Modeling; CCC: Cause and Effect, Systems; CCSS Math HSN-Q, HSA-CED, HSF-IF, HSF-LE; TEKS §112.48(c)(11)(A); FL SC.912.E.5.6; VA AS.2(e), AS.5(f); MA STE HS-ESS1-4/HS-PS2.

Kepler’s Third Law: Given semimajor axes or periods, which calculation correctly compares orbital periods for bodies around the same central mass?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.098 - Kepler’s Third Law: NGSS HS-ESS1-4, HS-PS2-1/4, HS-PS3-1/2; DCI ESS1.B, PS2.B, PS3.A/B; SEP: Mathematical and Computational Thinking, Modeling; CCC: Cause and Effect, Systems; CCSS Math HSN-Q, HSA-CED, HSF-IF, HSF-LE; TEKS §112.48(c)(11)(A); FL SC.912.E.5.6; VA AS.2(e), AS.5(f); MA STE HS-ESS1-4/HS-PS2.

Escape Velocity: Given mass and radius, which comparison correctly predicts escape velocity and distinguishes it from the speed needed to remain in orbit?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.099 - Escape Velocity: NGSS HS-ESS1-4, HS-PS2-1/4, HS-PS3-1/2; DCI ESS1.B, PS2.B, PS3.A/B; SEP: Mathematical and Computational Thinking, Modeling; CCC: Cause and Effect, Systems; CCSS Math HSN-Q, HSA-CED, HSF-IF, HSF-LE; TEKS §112.48(c)(11)(A); FL SC.912.E.5.6; VA AS.2(e), AS.5(f); MA STE HS-ESS1-4/HS-PS2.

Orbital Energy and Bound Orbits: Which energy description correctly distinguishes circular, elliptical, parabolic, and hyperbolic trajectories?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.100 - Orbital Energy and Bound Orbits: NGSS HS-ESS1-4, HS-PS2-1/4, HS-PS3-1/2; DCI ESS1.B, PS2.B, PS3.A/B; SEP: Mathematical and Computational Thinking, Modeling; CCC: Cause and Effect, Systems; CCSS Math HSN-Q, HSA-CED, HSF-IF, HSF-LE; TEKS §112.48(c)(11)(A); FL SC.912.E.5.6; VA AS.2(e), AS.5(f); MA STE HS-ESS1-4/HS-PS2.

Barycenters and Two-Body Systems: Which location of the center of mass is correct for a stated pair of bodies, and what observable motion results?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.101 - Barycenters and Two-Body Systems: NGSS HS-ESS1-4, HS-PS2-1/4, HS-PS3-1/2; DCI ESS1.B, PS2.B, PS3.A/B; SEP: Mathematical and Computational Thinking, Modeling; CCC: Cause and Effect, Systems; CCSS Math HSN-Q, HSA-CED, HSF-IF, HSF-LE; TEKS §112.48(c)(11)(A); FL SC.912.E.5.6; VA AS.2(e), AS.5(f); MA STE HS-ESS1-4/HS-PS2.

Tidal Forces, Roche Limits, and Hill Spheres: Which explanation best predicts stretching, disruption, ring formation, or satellite stability from differential gravity?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.102 - Tidal Forces, Roche Limits, and Hill Spheres: NGSS HS-ESS1-4, HS-PS2-1/4, HS-PS3-1/2; DCI ESS1.B, PS2.B, PS3.A/B; SEP: Mathematical and Computational Thinking, Modeling; CCC: Cause and Effect, Systems; CCSS Math HSN-Q, HSA-CED, HSF-IF, HSF-LE; TEKS §112.48(c)(11)(A); FL SC.912.E.5.6; VA AS.2(e), AS.5(f); MA STE HS-ESS1-4/HS-PS2.

Lagrange Points: Which Lagrange point best matches a stated stable or semi-stable observing or spacecraft location in a two-body system? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.103 - Lagrange Points: NGSS HS-ESS1-4, HS-PS2-1/4, HS-PS3-1/2; DCI ESS1.B, PS2.B, PS3.A/B; SEP: Mathematical and Computational Thinking, Modeling; CCC: Cause and Effect, Systems; CCSS Math HSN-Q, HSA-CED, HSF-IF, HSF-LE; TEKS §112.48(c)(11)(A); FL SC.912.E.5.6; VA AS.2(e), AS.5(f); MA STE HS-ESS1-4/HS-PS2.

Orbital Transfers and Gravity Assists: Which maneuver sequence correctly changes orbital energy, inclination, or destination while conserving fuel?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.104 - Orbital Transfers and Gravity Assists: NGSS HS-ESS1-4, HS-PS2-1/4, HS-PS3-1/2; DCI ESS1.B, PS2.B, PS3.A/B; SEP: Mathematical and Computational Thinking, Modeling; CCC: Cause and Effect, Systems; CCSS Math HSN-Q, HSA-CED, HSF-IF, HSF-LE; TEKS §112.48(c)(11)(A); FL SC.912.E.5.6; VA AS.2(e), AS.5(f); MA STE HS-ESS1-4/HS-PS2.

Relativity in Astronomy: Which observation is best explained by special or general relativity, such as time dilation, light bending, gravitational redshift, orbital precession, or gravitational waves?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.105 - Relativity in Astronomy: NGSS HS-ESS1-4, HS-PS2-1/4, HS-PS3-1/2; DCI ESS1.B, PS2.B, PS3.A/B; SEP: Mathematical and Computational Thinking, Modeling; CCC: Cause and Effect, Systems; CCSS Math HSN-Q, HSA-CED, HSF-IF, HSF-LE; TEKS §112.48(c)(11)(A); FL SC.912.E.5.6; VA AS.2(e), AS.5(f); MA STE HS-ESS1-4/HS-PS2.

Earth’s Rotation and Day-Night Cycles: Which observation or model best demonstrates that Earth’s rotation causes day and night and the apparent daily motion of the sky? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.106 - Earth’s Rotation and Day-Night Cycles: NGSS MS-ESS1-1 and HS-ESS1-4 connections; DCI ESS1.B; SEP: Developing and Using Models; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSG-SRT; TEKS §112.48(c)(8)-(9); FL SC.912.E.5.1,5; VA AS.5(a-b,e); MA STE MS-ESS1/HS-ESS1 connections.

Earth’s Revolution and the Annual Sky: Which seasonal change in the nighttime sky is caused primarily by Earth’s changing orbital position around the Sun?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.107 - Earth’s Revolution and the Annual Sky: NGSS MS-ESS1-1 and HS-ESS1-4 connections; DCI ESS1.B; SEP: Developing and Using Models; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSG-SRT; TEKS §112.48(c)(8)-(9); FL SC.912.E.5.1,5; VA AS.5(a-b,e); MA STE MS-ESS1/HS-ESS1 connections.

Axial Tilt and the Cause of Seasons: Which explanation correctly attributes seasons to axial tilt, changing solar angle, and daylight duration rather than Earth-Sun distance?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.108 - Axial Tilt and the Cause of Seasons: NGSS MS-ESS1-1 and HS-ESS1-4 connections; DCI ESS1.B; SEP: Developing and Using Models; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSG-SRT; TEKS §112.48(c)(8)-(9); FL SC.912.E.5.1,5; VA AS.5(a-b,e); MA STE MS-ESS1/HS-ESS1 connections.

Latitude, Solar Altitude, and Day Length: Given latitude and season, which prediction about noon Sun altitude, daylight length, or sunrise direction is correct? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.109 - Latitude, Solar Altitude, and Day Length: NGSS MS-ESS1-1 and HS-ESS1-4 connections; DCI ESS1.B; SEP: Developing and Using Models; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSG-SRT; TEKS §112.48(c)(8)-(9); FL SC.912.E.5.1,5; VA AS.5(a-b,e); MA STE MS-ESS1/HS-ESS1 connections.

Solstices and Equinoxes: Which Earth-Sun geometry correctly identifies a solstice or equinox and predicts the associated daylight pattern?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.110 - Solstices and Equinoxes: NGSS MS-ESS1-1 and HS-ESS1-4 connections; DCI ESS1.B; SEP: Developing and Using Models; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSG-SRT; TEKS §112.48(c)(8)-(9); FL SC.912.E.5.1,5; VA AS.5(a-b,e); MA STE MS-ESS1/HS-ESS1 connections.

Moon Rotation, Revolution, and Synchronous Spin: Which explanation best accounts for why nearly the same lunar hemisphere faces Earth throughout the Moon's orbit?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.111 - Moon Rotation, Revolution, and Synchronous Spin: NGSS MS-ESS1-1 and HS-ESS1-4 connections; DCI ESS1.B; SEP: Developing and Using Models; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSG-SRT; TEKS §112.48(c)(8)-(9); FL SC.912.E.5.1,5; VA AS.5(a-b,e); MA STE MS-ESS1/HS-ESS1 connections.

Lunar Phases: Given a Sun-Earth-Moon diagram, which lunar phase is seen from Earth and what fraction of the Moon is actually illuminated?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.112 - Lunar Phases: NGSS MS-ESS1-1 and HS-ESS1-4 connections; DCI ESS1.B; SEP: Developing and Using Models; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSG-SRT; TEKS §112.48(c)(8)-(9); FL SC.912.E.5.1,5; VA AS.5(a-b,e); MA STE MS-ESS1/HS-ESS1 connections.

Moonrise, Transit, and Moonset by Phase: Given a lunar phase, which approximate rise, transit, and set times are consistent with its position relative to the Sun? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.113 - Moonrise, Transit, and Moonset by Phase: NGSS MS-ESS1-1 and HS-ESS1-4 connections; DCI ESS1.B; SEP: Developing and Using Models; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSG-SRT; TEKS §112.48(c)(8)-(9); FL SC.912.E.5.1,5; VA AS.5(a-b,e); MA STE MS-ESS1/HS-ESS1 connections.

Solar Eclipse Geometry: Which alignment produces a total, partial, or annular solar eclipse, and where would each be visible?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.114 - Solar Eclipse Geometry: NGSS MS-ESS1-1 and HS-ESS1-4 connections; DCI ESS1.B; SEP: Developing and Using Models; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSG-SRT; TEKS §112.48(c)(8)-(9); FL SC.912.E.5.1,5; VA AS.5(a-b,e); MA STE MS-ESS1/HS-ESS1 connections.

Lunar Eclipse Geometry: Which alignment produces a penumbral, partial, or total lunar eclipse, and why can it be seen across a large region of Earth?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.115 - Lunar Eclipse Geometry: NGSS MS-ESS1-1 and HS-ESS1-4 connections; DCI ESS1.B; SEP: Developing and Using Models; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSG-SRT; TEKS §112.48(c)(8)-(9); FL SC.912.E.5.1,5; VA AS.5(a-b,e); MA STE MS-ESS1/HS-ESS1 connections.

Eclipse Seasons and Orbital Nodes: Which explanation best accounts for why eclipses do not occur at every new and full Moon? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.116 - Eclipse Seasons and Orbital Nodes: NGSS MS-ESS1-1 and HS-ESS1-4 connections; DCI ESS1.B; SEP: Developing and Using Models; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSG-SRT; TEKS §112.48(c)(8)-(9); FL SC.912.E.5.1,5; VA AS.5(a-b,e); MA STE MS-ESS1/HS-ESS1 connections.

Eclipse Cycles and Prediction: Which repeated orbital relationship allows eclipses to recur in similar patterns after a long interval?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.117 - Eclipse Cycles and Prediction: NGSS MS-ESS1-1 and HS-ESS1-4 connections; DCI ESS1.B; SEP: Developing and Using Models; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSG-SRT; TEKS §112.48(c)(8)-(9); FL SC.912.E.5.1,5; VA AS.5(a-b,e); MA STE MS-ESS1/HS-ESS1 connections.

Ocean Tides and Spring-Neap Cycles: Which Sun-Earth-Moon arrangement produces spring or neap tides, and which claim correctly distinguishes tidal range from wave height?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.118 - Ocean Tides and Spring-Neap Cycles: NGSS MS-ESS1-1 and HS-ESS1-4 connections; DCI ESS1.B; SEP: Developing and Using Models; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSG-SRT; TEKS §112.48(c)(8)-(9); FL SC.912.E.5.1,5; VA AS.5(a-b,e); MA STE MS-ESS1/HS-ESS1 connections.

Tidal Locking and Long-Term Evolution: Which transfer of angular momentum best explains synchronous rotation, orbital recession, or changes in rotation rate?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.119 - Tidal Locking and Long-Term Evolution: NGSS MS-ESS1-1 and HS-ESS1-4 connections; DCI ESS1.B; SEP: Developing and Using Models; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSG-SRT; TEKS §112.48(c)(8)-(9); FL SC.912.E.5.1,5; VA AS.5(a-b,e); MA STE MS-ESS1/HS-ESS1 connections.

Lunar Geology and the Moon’s Origin: Which evidence from craters, maria, highlands, samples, density, and orbital properties best supports a model of lunar history or giant-impact origin?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.120 - Lunar Geology and the Moon’s Origin: NGSS MS-ESS1-1 and HS-ESS1-4 connections; DCI ESS1.B; SEP: Developing and Using Models; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSG-SRT; TEKS §112.48(c)(8)-(9); FL SC.912.E.5.1,5; VA AS.5(a-b,e); MA STE MS-ESS1/HS-ESS1 connections.

The Solar Nebula Model: Which sequence best describes the collapse of a rotating cloud into the Sun, a disk, planetesimals, and planets?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.121 - The Solar Nebula Model: NGSS HS-ESS1-4/6; DCI ESS1.B/C; SEP: Constructing Explanations, Analyzing and Interpreting Data; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7; CCSS Math HSN-Q; TEKS §112.48(c)(7),(11); FL SC.912.E.5.2,3; VA AS.4(a-d); MA STE HS-ESS1-4/6.

Conservation of Angular Momentum in a Disk: Which change in rotation rate or disk shape is expected as a collapsing cloud becomes smaller and flatter?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.122 - Conservation of Angular Momentum in a Disk: NGSS HS-ESS1-4/6; DCI ESS1.B/C; SEP: Constructing Explanations, Analyzing and Interpreting Data; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7; CCSS Math HSN-Q; TEKS §112.48(c)(7),(11); FL SC.912.E.5.2,3; VA AS.4(a-d); MA STE HS-ESS1-4/6.

Condensation Sequence and the Frost Line: Which materials can condense at a stated disk temperature or distance, and how does the frost line affect planet composition? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.123 - Condensation Sequence and the Frost Line: NGSS HS-ESS1-4/6; DCI ESS1.B/C; SEP: Constructing Explanations, Analyzing and Interpreting Data; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7; CCSS Math HSN-Q; TEKS §112.48(c)(7),(11); FL SC.912.E.5.2,3; VA AS.4(a-d); MA STE HS-ESS1-4/6.

Accretion and Planetesimal Growth: Which collision and growth process best explains the progression from dust grains to planetesimals, protoplanets, and planetary embryos?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.124 - Accretion and Planetesimal Growth: NGSS HS-ESS1-4/6; DCI ESS1.B/C; SEP: Constructing Explanations, Analyzing and Interpreting Data; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7; CCSS Math HSN-Q; TEKS §112.48(c)(7),(11); FL SC.912.E.5.2,3; VA AS.4(a-d); MA STE HS-ESS1-4/6.

Differentiation and Internal Layering: Which heating and density process best explains the formation of metallic cores, rocky mantles, and crusts in young worlds?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.125 - Differentiation and Internal Layering: NGSS HS-ESS1-4/6; DCI ESS1.B/C; SEP: Constructing Explanations, Analyzing and Interpreting Data; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7; CCSS Math HSN-Q; TEKS §112.48(c)(7),(11); FL SC.912.E.5.2,3; VA AS.4(a-d); MA STE HS-ESS1-4/6.

Radiometric Ages and Meteorite Evidence: Which isotopic evidence or age comparison best constrains the formation time of the solar system? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.126 - Radiometric Ages and Meteorite Evidence: NGSS HS-ESS1-4/6; DCI ESS1.B/C; SEP: Constructing Explanations, Analyzing and Interpreting Data; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7; CCSS Math HSN-Q; TEKS §112.48(c)(7),(11); FL SC.912.E.5.2,3; VA AS.4(a-d); MA STE HS-ESS1-4/6.

Protoplanetary Disks as Evidence: Which disk observation best supports ongoing planet formation, dust growth, gaps, rings, or gas dispersal?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.127 - Protoplanetary Disks as Evidence: NGSS HS-ESS1-4/6; DCI ESS1.B/C; SEP: Constructing Explanations, Analyzing and Interpreting Data; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7; CCSS Math HSN-Q; TEKS §112.48(c)(7),(11); FL SC.912.E.5.2,3; VA AS.4(a-d); MA STE HS-ESS1-4/6.

Planet Migration and Orbital Resonance: Which gravitational interaction best explains a planet’s changing orbit or a repeated period ratio among orbiting bodies?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.128 - Planet Migration and Orbital Resonance: NGSS HS-ESS1-4/6; DCI ESS1.B/C; SEP: Constructing Explanations, Analyzing and Interpreting Data; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7; CCSS Math HSN-Q; TEKS §112.48(c)(7),(11); FL SC.912.E.5.2,3; VA AS.4(a-d); MA STE HS-ESS1-4/6.

Planets, Dwarf Planets, and Small-Body Categories: Which object satisfies the defining criteria for a planet, dwarf planet, moon, asteroid, comet, or minor body?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.129 - Planets, Dwarf Planets, and Small-Body Categories: NGSS HS-ESS1-4/6; DCI ESS1.B/C; SEP: Constructing Explanations, Analyzing and Interpreting Data; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7; CCSS Math HSN-Q; TEKS §112.48(c)(7),(11); FL SC.912.E.5.2,3; VA AS.4(a-d); MA STE HS-ESS1-4/6.

Scale of the Solar System: Which model or comparison correctly represents sizes or distances while clearly identifying the limitations of compressing both to one scale?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.130 - Scale of the Solar System: NGSS HS-ESS1-4/6; DCI ESS1.B/C; SEP: Constructing Explanations, Analyzing and Interpreting Data; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7; CCSS Math HSN-Q; TEKS §112.48(c)(7),(11); FL SC.912.E.5.2,3; VA AS.4(a-d); MA STE HS-ESS1-4/6.

Interpreting Planetary Data Tables: Given orbital and physical data, which pattern or classification correctly compares planets or smaller bodies?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.131 - Interpreting Planetary Data Tables: NGSS HS-ESS1-4/6; DCI ESS1.B/C; SEP: Constructing Explanations, Analyzing and Interpreting Data; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7; CCSS Math HSN-Q; TEKS §112.48(c)(7),(11); FL SC.912.E.5.2,3; VA AS.4(a-d); MA STE HS-ESS1-4/6.

Orbital and Physical Trends: Which trend involving distance, period, temperature, density, composition, or satellite number is supported by the data? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.132 - Orbital and Physical Trends: NGSS HS-ESS1-4/6; DCI ESS1.B/C; SEP: Constructing Explanations, Analyzing and Interpreting Data; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7; CCSS Math HSN-Q; TEKS §112.48(c)(7),(11); FL SC.912.E.5.2,3; VA AS.4(a-d); MA STE HS-ESS1-4/6.

Atmospheric Retention and Escape: Which combination of temperature, gravity, molecular mass, and solar radiation best predicts whether a world retains an atmosphere?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.133 - Atmospheric Retention and Escape: NGSS HS-ESS1-4/6; DCI ESS1.B/C; SEP: Constructing Explanations, Analyzing and Interpreting Data; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7; CCSS Math HSN-Q; TEKS §112.48(c)(7),(11); FL SC.912.E.5.2,3; VA AS.4(a-d); MA STE HS-ESS1-4/6.

Magnetic Fields and Planetary Dynamos: Which internal conditions best support a planetary magnetic field, and which evidence reveals that field? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.134 - Magnetic Fields and Planetary Dynamos: NGSS HS-ESS1-4/6; DCI ESS1.B/C; SEP: Constructing Explanations, Analyzing and Interpreting Data; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7; CCSS Math HSN-Q; TEKS §112.48(c)(7),(11); FL SC.912.E.5.2,3; VA AS.4(a-d); MA STE HS-ESS1-4/6.

Comparing Planet-Formation Models: Which observation would favor core accretion, gravitational instability, migration, or another planetary-system formation mechanism?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.135 - Comparing Planet-Formation Models: NGSS HS-ESS1-4/6; DCI ESS1.B/C; SEP: Constructing Explanations, Analyzing and Interpreting Data; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7; CCSS Math HSN-Q; TEKS §112.48(c)(7),(11); FL SC.912.E.5.2,3; VA AS.4(a-d); MA STE HS-ESS1-4/6.

Mercury: Surface, Interior, and Orbit: Which evidence best explains Mercury's large core, heavily cratered surface, temperature extremes, and orbital-spin relationship? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.136 - Mercury: Surface, Interior, and Orbit: NGSS HS-ESS1-6 and HS-ESS2-1/2/3/7 connections; DCI ESS1.C, ESS2.A/B; SEP: Analyzing Data, Modeling; CCC: Systems, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q, HSS-ID; TEKS §112.48(c)(11)(C-D); FL SC.912.E.5.2/3; VA AS.4(a-b,d); MA STE HS-ESS1/HS-ESS2.

Venus: Atmosphere and Runaway Greenhouse: Which atmospheric and surface evidence best explains Venus’s extreme temperature, pressure, clouds, and volcanic landscape?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.137 - Venus: Atmosphere and Runaway Greenhouse: NGSS HS-ESS1-6 and HS-ESS2-1/2/3/7 connections; DCI ESS1.C, ESS2.A/B; SEP: Analyzing Data, Modeling; CCC: Systems, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q, HSS-ID; TEKS §112.48(c)(11)(C-D); FL SC.912.E.5.2/3; VA AS.4(a-b,d); MA STE HS-ESS1/HS-ESS2.

Earth as a Planet: Which combination of internal activity, atmosphere, oceans, biosphere, magnetic field, and orbital conditions distinguishes Earth in comparative planetology? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.138 - Earth as a Planet: NGSS HS-ESS1-6 and HS-ESS2-1/2/3/7 connections; DCI ESS1.C, ESS2.A/B; SEP: Analyzing Data, Modeling; CCC: Systems, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q, HSS-ID; TEKS §112.48(c)(11)(C-D); FL SC.912.E.5.2/3; VA AS.4(a-b,d); MA STE HS-ESS1/HS-ESS2.

The Moon as a Terrestrial World: Which comparison correctly relates lunar density, atmosphere, tectonics, volcanism, cratering, and surface age to those of the planets?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.139 - The Moon as a Terrestrial World: NGSS HS-ESS1-6 and HS-ESS2-1/2/3/7 connections; DCI ESS1.C, ESS2.A/B; SEP: Analyzing Data, Modeling; CCC: Systems, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q, HSS-ID; TEKS §112.48(c)(11)(C-D); FL SC.912.E.5.2/3; VA AS.4(a-b,d); MA STE HS-ESS1/HS-ESS2.

Mars: Water, Climate, and Geology: Which landform, mineral, atmospheric, or ice observation best supports a conclusion about Mars’s past or present environment?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.140 - Mars: Water, Climate, and Geology: NGSS HS-ESS1-6 and HS-ESS2-1/2/3/7 connections; DCI ESS1.C, ESS2.A/B; SEP: Analyzing Data, Modeling; CCC: Systems, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q, HSS-ID; TEKS §112.48(c)(11)(C-D); FL SC.912.E.5.2/3; VA AS.4(a-b,d); MA STE HS-ESS1/HS-ESS2.

Terrestrial-Planet Interiors: Which mass, radius, density, seismic, rotational, or magnetic evidence best constrains the internal layering of a rocky world? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.141 - Terrestrial-Planet Interiors: NGSS HS-ESS1-6 and HS-ESS2-1/2/3/7 connections; DCI ESS1.C, ESS2.A/B; SEP: Analyzing Data, Modeling; CCC: Systems, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q, HSS-ID; TEKS §112.48(c)(11)(C-D); FL SC.912.E.5.2/3; VA AS.4(a-b,d); MA STE HS-ESS1/HS-ESS2.

Planetary Tectonics: Which stress or interior process best explains rifting, folding, faulting, plate motion, or a stagnant-lid surface?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.142 - Planetary Tectonics: NGSS HS-ESS1-6 and HS-ESS2-1/2/3/7 connections; DCI ESS1.C, ESS2.A/B; SEP: Analyzing Data, Modeling; CCC: Systems, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q, HSS-ID; TEKS §112.48(c)(11)(C-D); FL SC.912.E.5.2/3; VA AS.4(a-b,d); MA STE HS-ESS1/HS-ESS2.

Planetary Volcanism: Which magma source, eruption style, or landform is most consistent with the gravity, composition, temperature, and atmosphere of a given world?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.143 - Planetary Volcanism: NGSS HS-ESS1-6 and HS-ESS2-1/2/3/7 connections; DCI ESS1.C, ESS2.A/B; SEP: Analyzing Data, Modeling; CCC: Systems, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q, HSS-ID; TEKS §112.48(c)(11)(C-D); FL SC.912.E.5.2/3; VA AS.4(a-b,d); MA STE HS-ESS1/HS-ESS2.

Impact Cratering and Surface Age: Which crater-density comparison indicates the older surface, and which process could erase or modify craters?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.144 - Impact Cratering and Surface Age: NGSS HS-ESS1-6 and HS-ESS2-1/2/3/7 connections; DCI ESS1.C, ESS2.A/B; SEP: Analyzing Data, Modeling; CCC: Systems, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q, HSS-ID; TEKS §112.48(c)(11)(C-D); FL SC.912.E.5.2/3; VA AS.4(a-b,d); MA STE HS-ESS1/HS-ESS2.

Weathering, Erosion, and Surface Transport: Which agent - wind, liquid, ice, mass movement, or impacts - best explains the observed planetary landform?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.145 - Weathering, Erosion, and Surface Transport: NGSS HS-ESS1-6 and HS-ESS2-1/2/3/7 connections; DCI ESS1.C, ESS2.A/B; SEP: Analyzing Data, Modeling; CCC: Systems, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q, HSS-ID; TEKS §112.48(c)(11)(C-D); FL SC.912.E.5.2/3; VA AS.4(a-b,d); MA STE HS-ESS1/HS-ESS2.

Planetary Atmospheres and Greenhouse Effects: Which gas composition, pressure, cloud cover, or feedback best explains a planet's surface temperature relative to equilibrium expectations?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.146 - Planetary Atmospheres and Greenhouse Effects: NGSS HS-ESS1-6 and HS-ESS2-1/2/3/7 connections; DCI ESS1.C, ESS2.A/B; SEP: Analyzing Data, Modeling; CCC: Systems, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q, HSS-ID; TEKS §112.48(c)(11)(C-D); FL SC.912.E.5.2/3; VA AS.4(a-b,d); MA STE HS-ESS1/HS-ESS2.

Planetary Magnetic Dynamos: Which evidence best indicates an active or extinct dynamo, and what interior motion is required to sustain it?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.147 - Planetary Magnetic Dynamos: NGSS HS-ESS1-6 and HS-ESS2-1/2/3/7 connections; DCI ESS1.C, ESS2.A/B; SEP: Analyzing Data, Modeling; CCC: Systems, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q, HSS-ID; TEKS §112.48(c)(11)(C-D); FL SC.912.E.5.2/3; VA AS.4(a-b,d); MA STE HS-ESS1/HS-ESS2.

Water Histories on Rocky Worlds: Which evidence best distinguishes ancient flowing water, subsurface ice, atmospheric loss, or present liquid stability?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.148 - Water Histories on Rocky Worlds: NGSS HS-ESS1-6 and HS-ESS2-1/2/3/7 connections; DCI ESS1.C, ESS2.A/B; SEP: Analyzing Data, Modeling; CCC: Systems, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q, HSS-ID; TEKS §112.48(c)(11)(C-D); FL SC.912.E.5.2/3; VA AS.4(a-b,d); MA STE HS-ESS1/HS-ESS2.

Remote Sensing of Planetary Surfaces: Which wavelength, spectrum, radar signal, albedo pattern, or thermal map best identifies a surface material or physical property?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.149 - Remote Sensing of Planetary Surfaces: NGSS HS-ESS1-6 and HS-ESS2-1/2/3/7 connections; DCI ESS1.C, ESS2.A/B; SEP: Analyzing Data, Modeling; CCC: Systems, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q, HSS-ID; TEKS §112.48(c)(11)(C-D); FL SC.912.E.5.2/3; VA AS.4(a-b,d); MA STE HS-ESS1/HS-ESS2.

Divergent Climate Evolution: Which feedback or historical event best explains why initially similar rocky planets developed very different climates and surface conditions? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.150 - Divergent Climate Evolution: NGSS HS-ESS1-6 and HS-ESS2-1/2/3/7 connections; DCI ESS1.C, ESS2.A/B; SEP: Analyzing Data, Modeling; CCC: Systems, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q, HSS-ID; TEKS §112.48(c)(11)(C-D); FL SC.912.E.5.2/3; VA AS.4(a-b,d); MA STE HS-ESS1/HS-ESS2.

Jupiter: Structure and System: Which observation best explains Jupiter’s composition, internal heat, banded atmosphere, Great Red Spot, magnetic field, or moon system?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.151 - Jupiter: Structure and System: NGSS HS-ESS1-4/6 connections; DCI ESS1.B/C; SEP: Analyzing and Interpreting Data, Modeling; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(11)(B-D); FL SC.912.E.5.2/3; VA AS.4(a,d); MA STE HS-ESS1.

Saturn: Structure and System: Which evidence best explains Saturn's low density, atmospheric features, internal heat, rings, or diverse moons?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.152 - Saturn: Structure and System: NGSS HS-ESS1-4/6 connections; DCI ESS1.B/C; SEP: Analyzing and Interpreting Data, Modeling; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(11)(B-D); FL SC.912.E.5.2/3; VA AS.4(a,d); MA STE HS-ESS1.

Uranus: Tilt and Ice-Giant Properties: Which formation or collision scenario best accounts for Uranus's extreme axial tilt, seasons, ring orientation, and magnetosphere? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.153 - Uranus: Tilt and Ice-Giant Properties: NGSS HS-ESS1-4/6 connections; DCI ESS1.B/C; SEP: Analyzing and Interpreting Data, Modeling; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(11)(B-D); FL SC.912.E.5.2/3; VA AS.4(a,d); MA STE HS-ESS1.

Neptune: Weather and Internal Energy: Which energy source or atmospheric process best explains Neptune's high-speed winds, storms, and emitted heat?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.154 - Neptune: Weather and Internal Energy: NGSS HS-ESS1-4/6 connections; DCI ESS1.B/C; SEP: Analyzing and Interpreting Data, Modeling; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(11)(B-D); FL SC.912.E.5.2/3; VA AS.4(a,d); MA STE HS-ESS1.

Gas Giants and Ice Giants: Which comparison correctly distinguishes gas giants from ice giants by composition, internal structure, formation region, or atmospheric chemistry?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.155 - Gas Giants and Ice Giants: NGSS HS-ESS1-4/6 connections; DCI ESS1.B/C; SEP: Analyzing and Interpreting Data, Modeling; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(11)(B-D); FL SC.912.E.5.2/3; VA AS.4(a,d); MA STE HS-ESS1.

Giant-Planet Interiors and Heat Sources: Which pressure, phase, contraction, differentiation, or helium-rain process best explains a giant planet’s interior or excess heat?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.156 - Giant-Planet Interiors and Heat Sources: NGSS HS-ESS1-4/6 connections; DCI ESS1.B/C; SEP: Analyzing and Interpreting Data, Modeling; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(11)(B-D); FL SC.912.E.5.2/3; VA AS.4(a,d); MA STE HS-ESS1.

Bands, Zones, Storms, and Atmospheric Circulation: Which rotation, convection, chemistry, or wind pattern best explains a giant planet’s visible atmospheric structures?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.157 - Bands, Zones, Storms, and Atmospheric Circulation: NGSS HS-ESS1-4/6 connections; DCI ESS1.B/C; SEP: Analyzing and Interpreting Data, Modeling; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(11)(B-D); FL SC.912.E.5.2/3; VA AS.4(a,d); MA STE HS-ESS1.

Magnetospheres and Auroras: Which interaction among magnetic fields, charged particles, rotation, and the solar wind best explains an observed giant-planet aurora?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.158 - Magnetospheres and Auroras: NGSS HS-ESS1-4/6 connections; DCI ESS1.B/C; SEP: Analyzing and Interpreting Data, Modeling; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(11)(B-D); FL SC.912.E.5.2/3; VA AS.4(a,d); MA STE HS-ESS1.

Planetary Rings: Which particle behavior, resonance, shepherd-moon interaction, or Roche-limit condition best explains ring structure and persistence?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.159 - Planetary Rings: NGSS HS-ESS1-4/6 connections; DCI ESS1.B/C; SEP: Analyzing and Interpreting Data, Modeling; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(11)(B-D); FL SC.912.E.5.2/3; VA AS.4(a,d); MA STE HS-ESS1.

Regular and Irregular Moons: Which orbital and compositional evidence best distinguishes a moon formed in a circumplanetary disk from one likely captured later?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.160 - Regular and Irregular Moons: NGSS HS-ESS1-4/6 connections; DCI ESS1.B/C; SEP: Analyzing and Interpreting Data, Modeling; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(11)(B-D); FL SC.912.E.5.2/3; VA AS.4(a,d); MA STE HS-ESS1.

The Galilean Moons: Which evidence correctly matches Io, Europa, Ganymede, or Callisto with tidal heating, ocean potential, magnetic behavior, or crater history? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.161 - The Galilean Moons: NGSS HS-ESS1-4/6 connections; DCI ESS1.B/C; SEP: Analyzing and Interpreting Data, Modeling; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(11)(B-D); FL SC.912.E.5.2/3; VA AS.4(a,d); MA STE HS-ESS1.

Titan, Enceladus, and Ocean Worlds: Which atmospheric, plume, chemistry, or geophysical evidence best supports an inference about habitability or subsurface oceans? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.162 - Titan, Enceladus, and Ocean Worlds: NGSS HS-ESS1-4/6 connections; DCI ESS1.B/C; SEP: Analyzing and Interpreting Data, Modeling; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(11)(B-D); FL SC.912.E.5.2/3; VA AS.4(a,d); MA STE HS-ESS1.

Asteroids and the Asteroid Belt: Which orbit, spectrum, composition, family relationship, or meteorite link best classifies an asteroid or explains belt structure?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.163 - Asteroids and the Asteroid Belt: NGSS HS-ESS1-4/6 connections; DCI ESS1.B/C; SEP: Analyzing and Interpreting Data, Modeling; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(11)(B-D); FL SC.912.E.5.2/3; VA AS.4(a,d); MA STE HS-ESS1.

Comets, the Kuiper Belt, and the Oort Cloud: Which orbit and activity pattern best distinguishes a short-period comet, long-period comet, Kuiper Belt object, or Oort Cloud source?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.164 - Comets, the Kuiper Belt, and the Oort Cloud: NGSS HS-ESS1-4/6 connections; DCI ESS1.B/C; SEP: Analyzing and Interpreting Data, Modeling; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(11)(B-D); FL SC.912.E.5.2/3; VA AS.4(a,d); MA STE HS-ESS1.

Meteoroids, Meteors, Meteorites, and Near-Earth Objects: Which term correctly describes the object at each stage, and which data best assess an impact threat or meteorite origin?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.165 - Meteoroids, Meteors, Meteorites, and Near-Earth Objects: NGSS HS-ESS1-4/6 connections; DCI ESS1.B/C; SEP: Analyzing and Interpreting Data, Modeling; CCC: Patterns, Systems; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(11)(B-D); FL SC.912.E.5.2/3; VA AS.4(a,d); MA STE HS-ESS1.

Fundamental Properties of the Sun: Which values or comparisons correctly describe the Sun's mass, radius, luminosity, temperature, composition, rotation, and place among stars?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.166 - Fundamental Properties of the Sun: NGSS HS-ESS1-1, HS-PS1-8, HS-PS4-5; DCI ESS1.A, PS1.C, PS4.B; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q; TEKS §112.48(c)(12); FL SC.912.E.5.4/8; VA AS.4(e-f); MA STE HS-ESS1-1/HS-PS1-8.

Solar Interior Structure: Which layer - core, radiative zone, or convective zone - best matches a stated temperature, density, energy-production, or transport process? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.167 - Solar Interior Structure: NGSS HS-ESS1-1, HS-PS1-8, HS-PS4-5; DCI ESS1.A, PS1.C, PS4.B; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q; TEKS §112.48(c)(12); FL SC.912.E.5.4/8; VA AS.4(e-f); MA STE HS-ESS1-1/HS-PS1-8.

Hydrogen Fusion in the Sun: Which description correctly identifies proton-proton fusion as the source of solar energy and accounts for the mass-energy difference? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.168 - Hydrogen Fusion in the Sun: NGSS HS-ESS1-1, HS-PS1-8, HS-PS4-5; DCI ESS1.A, PS1.C, PS4.B; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q; TEKS §112.48(c)(12); FL SC.912.E.5.4/8; VA AS.4(e-f); MA STE HS-ESS1-1/HS-PS1-8.

Hydrostatic Equilibrium: Which balance between inward gravity and outward pressure keeps the Sun stable over most of its lifetime? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.169 - Hydrostatic Equilibrium: NGSS HS-ESS1-1, HS-PS1-8, HS-PS4-5; DCI ESS1.A, PS1.C, PS4.B; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q; TEKS §112.48(c)(12); FL SC.912.E.5.4/8; VA AS.4(e-f); MA STE HS-ESS1-1/HS-PS1-8.

Energy Transport Through the Sun: Which sequence correctly traces energy from nuclear reactions through radiation, convection, and escape from the photosphere?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.170 - Energy Transport Through the Sun: NGSS HS-ESS1-1, HS-PS1-8, HS-PS4-5; DCI ESS1.A, PS1.C, PS4.B; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q; TEKS §112.48(c)(12); FL SC.912.E.5.4/8; VA AS.4(e-f); MA STE HS-ESS1-1/HS-PS1-8.

Photosphere, Chromosphere, and Corona: Which solar atmospheric layer best matches an observed spectrum, temperature, eclipse appearance, or feature? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.171 - Photosphere, Chromosphere, and Corona: NGSS HS-ESS1-1, HS-PS1-8, HS-PS4-5; DCI ESS1.A, PS1.C, PS4.B; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q; TEKS §112.48(c)(12); FL SC.912.E.5.4/8; VA AS.4(e-f); MA STE HS-ESS1-1/HS-PS1-8.

Sunspots and Magnetic Fields: Which magnetic and thermal explanation best accounts for the dark appearance, paired polarity, or motion of sunspots?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.172 - Sunspots and Magnetic Fields: NGSS HS-ESS1-1, HS-PS1-8, HS-PS4-5; DCI ESS1.A, PS1.C, PS4.B; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q; TEKS §112.48(c)(12); FL SC.912.E.5.4/8; VA AS.4(e-f); MA STE HS-ESS1-1/HS-PS1-8.

The Solar Activity Cycle: Which graph or observation correctly identifies the approximately 11-year sunspot cycle and the associated magnetic reversal pattern? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.173 - The Solar Activity Cycle: NGSS HS-ESS1-1, HS-PS1-8, HS-PS4-5; DCI ESS1.A, PS1.C, PS4.B; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q; TEKS §112.48(c)(12); FL SC.912.E.5.4/8; VA AS.4(e-f); MA STE HS-ESS1-1/HS-PS1-8.

Prominences, Flares, and Coronal Mass Ejections: Which solar event best matches a stated energy release, plasma structure, radiation burst, or ejected cloud?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.174 - Prominences, Flares, and Coronal Mass Ejections: NGSS HS-ESS1-1, HS-PS1-8, HS-PS4-5; DCI ESS1.A, PS1.C, PS4.B; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q; TEKS §112.48(c)(12); FL SC.912.E.5.4/8; VA AS.4(e-f); MA STE HS-ESS1-1/HS-PS1-8.

Solar Wind and the Heliosphere: Which statement best describes the origin of the solar wind and the boundary between the heliosphere and interstellar space?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.175 - Solar Wind and the Heliosphere: NGSS HS-ESS1-1, HS-PS1-8, HS-PS4-5; DCI ESS1.A, PS1.C, PS4.B; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q; TEKS §112.48(c)(12); FL SC.912.E.5.4/8; VA AS.4(e-f); MA STE HS-ESS1-1/HS-PS1-8.

Space Weather Effects on Earth: Which solar event is most likely to disrupt satellites, radio, navigation, power systems, or astronaut safety, and why?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.176 - Space Weather Effects on Earth: NGSS HS-ESS1-1, HS-PS1-8, HS-PS4-5; DCI ESS1.A, PS1.C, PS4.B; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q; TEKS §112.48(c)(12); FL SC.912.E.5.4/8; VA AS.4(e-f); MA STE HS-ESS1-1/HS-PS1-8.

Auroras and Magnetospheric Interaction: Which path of charged particles and magnetic-field interaction best explains auroral location, color, and intensity?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.177 - Auroras and Magnetospheric Interaction: NGSS HS-ESS1-1, HS-PS1-8, HS-PS4-5; DCI ESS1.A, PS1.C, PS4.B; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q; TEKS §112.48(c)(12); FL SC.912.E.5.4/8; VA AS.4(e-f); MA STE HS-ESS1-1/HS-PS1-8.

Helioseismology and Solar Neutrinos: Which measurement of oscillations or neutrinos provides evidence about otherwise hidden processes in the solar interior?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.178 - Helioseismology and Solar Neutrinos: NGSS HS-ESS1-1, HS-PS1-8, HS-PS4-5; DCI ESS1.A, PS1.C, PS4.B; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q; TEKS §112.48(c)(12); FL SC.912.E.5.4/8; VA AS.4(e-f); MA STE HS-ESS1-1/HS-PS1-8.

Differential Rotation: Which observation correctly shows that the Sun's equatorial regions rotate at a different rate from higher latitudes? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.179 - Differential Rotation: NGSS HS-ESS1-1, HS-PS1-8, HS-PS4-5; DCI ESS1.A, PS1.C, PS4.B; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q; TEKS §112.48(c)(12); FL SC.912.E.5.4/8; VA AS.4(e-f); MA STE HS-ESS1-1/HS-PS1-8.

Solar History, Future, and Safe Monitoring: Which model best describes the Sun’s changing luminosity and future evolution, and which observing method monitors it safely?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.180 - Solar History, Future, and Safe Monitoring: NGSS HS-ESS1-1, HS-PS1-8, HS-PS4-5; DCI ESS1.A, PS1.C, PS4.B; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.7; CCSS Math HSN-Q; TEKS §112.48(c)(12); FL SC.912.E.5.4/8; VA AS.4(e-f); MA STE HS-ESS1-1/HS-PS1-8.

Apparent and Absolute Magnitude: Which comparison correctly distinguishes how bright a star appears from how bright it would appear at a standard distance?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.181 - Apparent and Absolute Magnitude: NGSS HS-ESS1-1/3, HS-PS4-1/2; DCI ESS1.A, PS4.A/B; SEP: Analyzing Data, Using Mathematics; CCC: Patterns, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF/LE; TEKS §112.48(c)(13)(A,E-H); FL SC.912.E.5.5/8/11; VA AS.3(b,d,i); MA STE HS-ESS1-1/3.

Magnitude Differences and Brightness Ratios: Given a magnitude difference, which brightness ratio or ranking is correct?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.182 - Magnitude Differences and Brightness Ratios: NGSS HS-ESS1-1/3, HS-PS4-1/2; DCI ESS1.A, PS4.A/B; SEP: Analyzing Data, Using Mathematics; CCC: Patterns, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF/LE; TEKS §112.48(c)(13)(A,E-H); FL SC.912.E.5.5/8/11; VA AS.3(b,d,i); MA STE HS-ESS1-1/3.

Luminosity, Flux, and Distance: Given two of luminosity, flux, and distance, which calculation or inference correctly determines the third? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.183 - Luminosity, Flux, and Distance: NGSS HS-ESS1-1/3, HS-PS4-1/2; DCI ESS1.A, PS4.A/B; SEP: Analyzing Data, Using Mathematics; CCC: Patterns, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF/LE; TEKS §112.48(c)(13)(A,E-H); FL SC.912.E.5.5/8/11; VA AS.3(b,d,i); MA STE HS-ESS1-1/3.

Stellar Color and Surface Temperature: Which color index or visible color corresponds to the hotter surface, and why can dust alter the observed color?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.184 - Stellar Color and Surface Temperature: NGSS HS-ESS1-1/3, HS-PS4-1/2; DCI ESS1.A, PS4.A/B; SEP: Analyzing Data, Using Mathematics; CCC: Patterns, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF/LE; TEKS §112.48(c)(13)(A,E-H); FL SC.912.E.5.5/8/11; VA AS.3(b,d,i); MA STE HS-ESS1-1/3.

Spectral Classes OBAFGKM: Which spectral class correctly matches a stated temperature, color, absorption-line pattern, or common stellar property? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.185 - Spectral Classes OBAFGKM: NGSS HS-ESS1-1/3, HS-PS4-1/2; DCI ESS1.A, PS4.A/B; SEP: Analyzing Data, Using Mathematics; CCC: Patterns, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF/LE; TEKS §112.48(c)(13)(A,E-H); FL SC.912.E.5.5/8/11; VA AS.3(b,d,i); MA STE HS-ESS1-1/3.

Stellar Composition from Absorption Lines: Which set of lines identifies the stated element or ion and distinguishes abundance from temperature effects?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.186 - Stellar Composition from Absorption Lines: NGSS HS-ESS1-1/3, HS-PS4-1/2; DCI ESS1.A, PS4.A/B; SEP: Analyzing Data, Using Mathematics; CCC: Patterns, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF/LE; TEKS §112.48(c)(13)(A,E-H); FL SC.912.E.5.5/8/11; VA AS.3(b,d,i); MA STE HS-ESS1-1/3.

Radial Velocity from Doppler Shift: Given a shifted stellar line, which radial speed and direction are consistent with the data?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.187 - Radial Velocity from Doppler Shift: NGSS HS-ESS1-1/3, HS-PS4-1/2; DCI ESS1.A, PS4.A/B; SEP: Analyzing Data, Using Mathematics; CCC: Patterns, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF/LE; TEKS §112.48(c)(13)(A,E-H); FL SC.912.E.5.5/8/11; VA AS.3(b,d,i); MA STE HS-ESS1-1/3.

Proper Motion and Transverse Velocity: Given angular motion and distance, which inference correctly describes a star’s motion across the sky?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.188 - Proper Motion and Transverse Velocity: NGSS HS-ESS1-1/3, HS-PS4-1/2; DCI ESS1.A, PS4.A/B; SEP: Analyzing Data, Using Mathematics; CCC: Patterns, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF/LE; TEKS §112.48(c)(13)(A,E-H); FL SC.912.E.5.5/8/11; VA AS.3(b,d,i); MA STE HS-ESS1-1/3.

Stellar Space Velocity: Which combination of radial velocity, proper motion, and distance is needed to determine a star’s three-dimensional motion?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.189 - Stellar Space Velocity: NGSS HS-ESS1-1/3, HS-PS4-1/2; DCI ESS1.A, PS4.A/B; SEP: Analyzing Data, Using Mathematics; CCC: Patterns, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF/LE; TEKS §112.48(c)(13)(A,E-H); FL SC.912.E.5.5/8/11; VA AS.3(b,d,i); MA STE HS-ESS1-1/3.

Geometric Parallax: Given a parallax angle, which distance in parsecs or light-years is correct, and what limits the method?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.190 - Geometric Parallax: NGSS HS-ESS1-1/3, HS-PS4-1/2; DCI ESS1.A, PS4.A/B; SEP: Analyzing Data, Using Mathematics; CCC: Patterns, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF/LE; TEKS §112.48(c)(13)(A,E-H); FL SC.912.E.5.5/8/11; VA AS.3(b,d,i); MA STE HS-ESS1-1/3.

Main-Sequence Fitting and Spectroscopic Parallax: Which comparison of spectral type, luminosity class, or cluster sequence yields a reasonable distance estimate?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.191 - Main-Sequence Fitting and Spectroscopic Parallax: NGSS HS-ESS1-1/3, HS-PS4-1/2; DCI ESS1.A, PS4.A/B; SEP: Analyzing Data, Using Mathematics; CCC: Patterns, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF/LE; TEKS §112.48(c)(13)(A,E-H); FL SC.912.E.5.5/8/11; VA AS.3(b,d,i); MA STE HS-ESS1-1/3.

Standard Candles and Variable Stars: Which variable-star period or calibrated luminosity relation can be used to infer distance, and what assumption is required?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.192 - Standard Candles and Variable Stars: NGSS HS-ESS1-1/3, HS-PS4-1/2; DCI ESS1.A, PS4.A/B; SEP: Analyzing Data, Using Mathematics; CCC: Patterns, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF/LE; TEKS §112.48(c)(13)(A,E-H); FL SC.912.E.5.5/8/11; VA AS.3(b,d,i); MA STE HS-ESS1-1/3.

Stellar Radius from Luminosity and Temperature: Given luminosity and temperature, which comparison or calculation correctly predicts stellar radius?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.193 - Stellar Radius from Luminosity and Temperature: NGSS HS-ESS1-1/3, HS-PS4-1/2; DCI ESS1.A, PS4.A/B; SEP: Analyzing Data, Using Mathematics; CCC: Patterns, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF/LE; TEKS §112.48(c)(13)(A,E-H); FL SC.912.E.5.5/8/11; VA AS.3(b,d,i); MA STE HS-ESS1-1/3.

Stellar Masses from Binary Orbits: Given a binary period and separation, which conclusion about total mass follows from orbital dynamics?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.194 - Stellar Masses from Binary Orbits: NGSS HS-ESS1-1/3, HS-PS4-1/2; DCI ESS1.A, PS4.A/B; SEP: Analyzing Data, Using Mathematics; CCC: Patterns, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF/LE; TEKS §112.48(c)(13)(A,E-H); FL SC.912.E.5.5/8/11; VA AS.3(b,d,i); MA STE HS-ESS1-1/3.

The Hertzsprung-Russell Diagram: Given a star's luminosity and temperature, which region, size class, or evolutionary interpretation on an H-R diagram is correct?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.195 - The Hertzsprung-Russell Diagram: NGSS HS-ESS1-1/3, HS-PS4-1/2; DCI ESS1.A, PS4.A/B; SEP: Analyzing Data, Using Mathematics; CCC: Patterns, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSN-Q, HSF-IF/LE; TEKS §112.48(c)(13)(A,E-H); FL SC.912.E.5.5/8/11; VA AS.3(b,d,i); MA STE HS-ESS1-1/3.

Molecular Clouds and Gravitational Collapse: Which combination of low temperature, high density, compression, and gravity most favors the collapse of a star-forming cloud?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.196 - Molecular Clouds and Gravitational Collapse: NGSS HS-ESS1-1/3, HS-PS1-8; DCI ESS1.A, PS1.C; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.2,7; TEKS §112.48(c)(13)(B-D,F); FL SC.912.E.5.5/11; VA AS.3(c,e-f); MA STE HS-ESS1-1/3.

Protostars and Pre-Main-Sequence Evolution: Which observation best identifies a protostar or young star, including infrared excess, disks, jets, or variability? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.197 - Protostars and Pre-Main-Sequence Evolution: NGSS HS-ESS1-1/3, HS-PS1-8; DCI ESS1.A, PS1.C; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.2,7; TEKS §112.48(c)(13)(B-D,F); FL SC.912.E.5.5/11; VA AS.3(c,e-f); MA STE HS-ESS1-1/3.

The Main Sequence and Stellar Mass: Which statement correctly relates a main-sequence star's mass to its luminosity, temperature, fuel-use rate, and lifetime? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.198 - The Main Sequence and Stellar Mass: NGSS HS-ESS1-1/3, HS-PS1-8; DCI ESS1.A, PS1.C; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.2,7; TEKS §112.48(c)(13)(B-D,F); FL SC.912.E.5.5/11; VA AS.3(c,e-f); MA STE HS-ESS1-1/3.

Fusion Stages in Stellar Cores: Which fuel and product are expected at a stated stage of stellar evolution, and what temperature trend enables later fusion?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.199 - Fusion Stages in Stellar Cores: NGSS HS-ESS1-1/3, HS-PS1-8; DCI ESS1.A, PS1.C; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.2,7; TEKS §112.48(c)(13)(B-D,F); FL SC.912.E.5.5/11; VA AS.3(c,e-f); MA STE HS-ESS1-1/3.

Low-Mass Red-Giant Evolution: Which sequence correctly traces a Sun-like star from hydrogen exhaustion through red-giant and helium-burning stages?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.200 - Low-Mass Red-Giant Evolution: NGSS HS-ESS1-1/3, HS-PS1-8; DCI ESS1.A, PS1.C; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.2,7; TEKS §112.48(c)(13)(B-D,F); FL SC.912.E.5.5/11; VA AS.3(c,e-f); MA STE HS-ESS1-1/3.

Planetary Nebulae and White Dwarfs: Which process best explains envelope ejection, planetary-nebula emission, and the hot degenerate core left behind? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.201 - Planetary Nebulae and White Dwarfs: NGSS HS-ESS1-1/3, HS-PS1-8; DCI ESS1.A, PS1.C; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.2,7; TEKS §112.48(c)(13)(B-D,F); FL SC.912.E.5.5/11; VA AS.3(c,e-f); MA STE HS-ESS1-1/3.

White-Dwarf Properties and Degeneracy Pressure: Which statement correctly describes a white dwarf's size, density, cooling, and support against gravity? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.202 - White-Dwarf Properties and Degeneracy Pressure: NGSS HS-ESS1-1/3, HS-PS1-8; DCI ESS1.A, PS1.C; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.2,7; TEKS §112.48(c)(13)(B-D,F); FL SC.912.E.5.5/11; VA AS.3(c,e-f); MA STE HS-ESS1-1/3.

High-Mass Stars and Supergiants: Which sequence of fusion shells and structural changes is expected in a high-mass star approaching core collapse?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.203 - High-Mass Stars and Supergiants: NGSS HS-ESS1-1/3, HS-PS1-8; DCI ESS1.A, PS1.C; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.2,7; TEKS §112.48(c)(13)(B-D,F); FL SC.912.E.5.5/11; VA AS.3(c,e-f); MA STE HS-ESS1-1/3.

Core-Collapse Supernovae: Which observation or internal event best explains a massive star's collapse, neutrino burst, explosion, and remnant? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.204 - Core-Collapse Supernovae: NGSS HS-ESS1-1/3, HS-PS1-8; DCI ESS1.A, PS1.C; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.2,7; TEKS §112.48(c)(13)(B-D,F); FL SC.912.E.5.5/11; VA AS.3(c,e-f); MA STE HS-ESS1-1/3.

Type Ia Supernovae and Novae: Which binary-system process distinguishes a nova from a Type Ia supernova, and which is useful as a distance indicator?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.205 - Type Ia Supernovae and Novae: NGSS HS-ESS1-1/3, HS-PS1-8; DCI ESS1.A, PS1.C; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.2,7; TEKS §112.48(c)(13)(B-D,F); FL SC.912.E.5.5/11; VA AS.3(c,e-f); MA STE HS-ESS1-1/3.

Neutron Stars and Pulsars: Which combination of density, rotation, magnetic field, and beam geometry best explains pulsar signals?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.206 - Neutron Stars and Pulsars: NGSS HS-ESS1-1/3, HS-PS1-8; DCI ESS1.A, PS1.C; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.2,7; TEKS §112.48(c)(13)(B-D,F); FL SC.912.E.5.5/11; VA AS.3(c,e-f); MA STE HS-ESS1-1/3.

Magnetars and High-Energy Transients: Which extreme magnetic-field process best explains repeated X-ray or gamma-ray bursts from a compact object?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.207 - Magnetars and High-Energy Transients: NGSS HS-ESS1-1/3, HS-PS1-8; DCI ESS1.A, PS1.C; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.2,7; TEKS §112.48(c)(13)(B-D,F); FL SC.912.E.5.5/11; VA AS.3(c,e-f); MA STE HS-ESS1-1/3.

Black Holes and Event Horizons: Which evidence best supports the presence of a black hole, and which statement correctly describes the event horizon?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.208 - Black Holes and Event Horizons: NGSS HS-ESS1-1/3, HS-PS1-8; DCI ESS1.A, PS1.C; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.2,7; TEKS §112.48(c)(13)(B-D,F); FL SC.912.E.5.5/11; VA AS.3(c,e-f); MA STE HS-ESS1-1/3.

Accretion Disks and X-Ray Binaries: Which energy-conversion process best explains intense X-ray emission from matter orbiting a neutron star or black hole?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.209 - Accretion Disks and X-Ray Binaries: NGSS HS-ESS1-1/3, HS-PS1-8; DCI ESS1.A, PS1.C; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.2,7; TEKS §112.48(c)(13)(B-D,F); FL SC.912.E.5.5/11; VA AS.3(c,e-f); MA STE HS-ESS1-1/3.

Nucleosynthesis and Stellar Feedback: Which elements or enrichment process are associated with stellar fusion, supernovae, neutron-capture events, and the recycling of matter into new stars? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.210 - Nucleosynthesis and Stellar Feedback: NGSS HS-ESS1-1/3, HS-PS1-8; DCI ESS1.A, PS1.C; SEP: Developing Models, Communicating Information; CCC: Energy and Matter, Stability and Change; CCSS RST.11-12.2,7; TEKS §112.48(c)(13)(B-D,F); FL SC.912.E.5.5/11; VA AS.3(c,e-f); MA STE HS-ESS1-1/3.

Phases of the Interstellar Medium: Which temperature, density, ionization state, or observation best identifies cold molecular gas, neutral atomic gas, warm ionized gas, or hot plasma?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.211 - Phases of the Interstellar Medium: NGSS HS-ESS1-2/3/4; DCI ESS1.A/B; SEP: Analyzing Data, Developing Models; CCC: Systems, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14)(A,D-E); FL SC.912.E.5.3/9/11; VA AS.3(g,k); MA STE HS-ESS1-2/3.

Emission, Reflection, and Dark Nebulae: Which interaction between gas, dust, and starlight produces the observed nebular appearance?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.212 - Emission, Reflection, and Dark Nebulae: NGSS HS-ESS1-2/3/4; DCI ESS1.A/B; SEP: Analyzing Data, Developing Models; CCC: Systems, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14)(A,D-E); FL SC.912.E.5.3/9/11; VA AS.3(g,k); MA STE HS-ESS1-2/3.

Interstellar Extinction and Reddening: Which wavelength-dependent effect best explains why a distant object appears dimmer and redder than expected? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.213 - Interstellar Extinction and Reddening: NGSS HS-ESS1-2/3/4; DCI ESS1.A/B; SEP: Analyzing Data, Developing Models; CCC: Systems, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14)(A,D-E); FL SC.912.E.5.3/9/11; VA AS.3(g,k); MA STE HS-ESS1-2/3.

H II Regions and Stellar Nurseries: Which source of ionizing radiation and gas response best explains an H II region around young massive stars? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.214 - H II Regions and Stellar Nurseries: NGSS HS-ESS1-2/3/4; DCI ESS1.A/B; SEP: Analyzing Data, Developing Models; CCC: Systems, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14)(A,D-E); FL SC.912.E.5.3/9/11; VA AS.3(g,k); MA STE HS-ESS1-2/3.

Cosmic Rays and Galactic Magnetic Fields: Which evidence best reveals energetic particles or large-scale magnetic fields within the galaxy?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.215 - Cosmic Rays and Galactic Magnetic Fields: NGSS HS-ESS1-2/3/4; DCI ESS1.A/B; SEP: Analyzing Data, Developing Models; CCC: Systems, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14)(A,D-E); FL SC.912.E.5.3/9/11; VA AS.3(g,k); MA STE HS-ESS1-2/3.

Milky Way Components: Which stars, gas, dust, and motions are most characteristic of the thin disk, thick disk, bulge, bar, or halo?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.216 - Milky Way Components: NGSS HS-ESS1-2/3/4; DCI ESS1.A/B; SEP: Analyzing Data, Developing Models; CCC: Systems, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14)(A,D-E); FL SC.912.E.5.3/9/11; VA AS.3(g,k); MA STE HS-ESS1-2/3.

The Sun’s Location in the Milky Way: Which model correctly places the solar system within the galactic disk and describes its orbit around the center?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.217 - The Sun’s Location in the Milky Way: NGSS HS-ESS1-2/3/4; DCI ESS1.A/B; SEP: Analyzing Data, Developing Models; CCC: Systems, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14)(A,D-E); FL SC.912.E.5.3/9/11; VA AS.3(g,k); MA STE HS-ESS1-2/3.

Milky Way Rotation and Dark Matter: Which rotation-curve pattern suggests that visible matter alone cannot account for the galaxy's gravitational field?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.218 - Milky Way Rotation and Dark Matter: NGSS HS-ESS1-2/3/4; DCI ESS1.A/B; SEP: Analyzing Data, Developing Models; CCC: Systems, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14)(A,D-E); FL SC.912.E.5.3/9/11; VA AS.3(g,k); MA STE HS-ESS1-2/3.

Spiral Structure and Density Waves: Which observation or model best explains spiral arms as regions of enhanced star formation rather than permanently fixed groups of stars?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.219 - Spiral Structure and Density Waves: NGSS HS-ESS1-2/3/4; DCI ESS1.A/B; SEP: Analyzing Data, Developing Models; CCC: Systems, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14)(A,D-E); FL SC.912.E.5.3/9/11; VA AS.3(g,k); MA STE HS-ESS1-2/3.

Stellar Populations and Metallicity: Which age, orbit, location, and elemental abundance best distinguishes Population I, Population II, or very early stars?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.220 - Stellar Populations and Metallicity: NGSS HS-ESS1-2/3/4; DCI ESS1.A/B; SEP: Analyzing Data, Developing Models; CCC: Systems, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14)(A,D-E); FL SC.912.E.5.3/9/11; VA AS.3(g,k); MA STE HS-ESS1-2/3.

Open and Globular Clusters: Which age, location, shape, metallicity, and stellar population correctly identifies an open or globular cluster?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.221 - Open and Globular Clusters: NGSS HS-ESS1-2/3/4; DCI ESS1.A/B; SEP: Analyzing Data, Developing Models; CCC: Systems, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14)(A,D-E); FL SC.912.E.5.3/9/11; VA AS.3(g,k); MA STE HS-ESS1-2/3.

The Galactic Center and Sagittarius A*: Which stellar-orbit, radio, infrared, or X-ray evidence supports a supermassive black hole at the Milky Way's center?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.222 - The Galactic Center and Sagittarius A*: NGSS HS-ESS1-2/3/4; DCI ESS1.A/B; SEP: Analyzing Data, Developing Models; CCC: Systems, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14)(A,D-E); FL SC.912.E.5.3/9/11; VA AS.3(g,k); MA STE HS-ESS1-2/3.

Mapping the Galaxy with 21-Centimeter and Molecular Lines: Which spectral observation best traces neutral hydrogen, molecular clouds, or galactic rotation through obscuring dust?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.223 - Mapping the Galaxy with 21-Centimeter and Molecular Lines: NGSS HS-ESS1-2/3/4; DCI ESS1.A/B; SEP: Analyzing Data, Developing Models; CCC: Systems, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14)(A,D-E); FL SC.912.E.5.3/9/11; VA AS.3(g,k); MA STE HS-ESS1-2/3.

Milky Way Satellites and the Local Group: Which object is a satellite galaxy, and which gravitational interaction best explains streams, mergers, or Local Group motion? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.224 - Milky Way Satellites and the Local Group: NGSS HS-ESS1-2/3/4; DCI ESS1.A/B; SEP: Analyzing Data, Developing Models; CCC: Systems, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14)(A,D-E); FL SC.912.E.5.3/9/11; VA AS.3(g,k); MA STE HS-ESS1-2/3.

Galactic Chemical Evolution and Archaeology: Which abundance pattern or stellar population best preserves evidence of earlier generations of stars and galaxy assembly?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.225 - Galactic Chemical Evolution and Archaeology: NGSS HS-ESS1-2/3/4; DCI ESS1.A/B; SEP: Analyzing Data, Developing Models; CCC: Systems, Scale/Proportion/Quantity; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14)(A,D-E); FL SC.912.E.5.3/9/11; VA AS.3(g,k); MA STE HS-ESS1-2/3.

Galaxy Classification: Which visible structure correctly classifies a galaxy as spiral, barred spiral, elliptical, lenticular, irregular, or dwarf?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.226 - Galaxy Classification: NGSS HS-ESS1-2/4; DCI ESS1.A/B; SEP: Analyzing Data, Modeling; CCC: Patterns, Scale, Stability and Change; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14); FL SC.912.E.5.3/9; VA AS.3(g-h,k); MA STE HS-ESS1-2.

Spiral-Galaxy Structure: Which component - disk, bulge, halo, bar, arm, gas, or dust - best matches the stated stellar population or star-formation activity?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.227 - Spiral-Galaxy Structure: NGSS HS-ESS1-2/4; DCI ESS1.A/B; SEP: Analyzing Data, Modeling; CCC: Patterns, Scale, Stability and Change; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14); FL SC.912.E.5.3/9; VA AS.3(g-h,k); MA STE HS-ESS1-2.

Elliptical Galaxies: Which property best distinguishes a typical elliptical galaxy in shape, gas content, stellar age, motion, or star-formation rate?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.228 - Elliptical Galaxies: NGSS HS-ESS1-2/4; DCI ESS1.A/B; SEP: Analyzing Data, Modeling; CCC: Patterns, Scale, Stability and Change; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14); FL SC.912.E.5.3/9; VA AS.3(g-h,k); MA STE HS-ESS1-2.

Irregular and Dwarf Galaxies: Which feature or evolutionary influence best explains an irregular or dwarf galaxy's structure, gas content, or star formation?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.229 - Irregular and Dwarf Galaxies: NGSS HS-ESS1-2/4; DCI ESS1.A/B; SEP: Analyzing Data, Modeling; CCC: Patterns, Scale, Stability and Change; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14); FL SC.912.E.5.3/9; VA AS.3(g-h,k); MA STE HS-ESS1-2.

Galaxy Mass, Luminosity, Color, and Gas: Given a galaxy data set, which relationship or classification correctly connects mass, color, gas fraction, and star formation?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.230 - Galaxy Mass, Luminosity, Color, and Gas: NGSS HS-ESS1-2/4; DCI ESS1.A/B; SEP: Analyzing Data, Modeling; CCC: Patterns, Scale, Stability and Change; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14); FL SC.912.E.5.3/9; VA AS.3(g-h,k); MA STE HS-ESS1-2.

Galaxy Distances and Redshifts: Which distance method or redshift interpretation is appropriate for a galaxy at the stated scale?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.231 - Galaxy Distances and Redshifts: NGSS HS-ESS1-2/4; DCI ESS1.A/B; SEP: Analyzing Data, Modeling; CCC: Patterns, Scale, Stability and Change; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14); FL SC.912.E.5.3/9; VA AS.3(g-h,k); MA STE HS-ESS1-2.

Galaxy Rotation Curves: Which comparison between observed and predicted orbital speeds provides evidence for an extended dark-matter halo?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.232 - Galaxy Rotation Curves: NGSS HS-ESS1-2/4; DCI ESS1.A/B; SEP: Analyzing Data, Modeling; CCC: Patterns, Scale, Stability and Change; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14); FL SC.912.E.5.3/9; VA AS.3(g-h,k); MA STE HS-ESS1-2.

Galaxy Groups and Clusters: Which gravitational, X-ray, lensing, or velocity evidence best estimates cluster mass or identifies intracluster gas?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.233 - Galaxy Groups and Clusters: NGSS HS-ESS1-2/4; DCI ESS1.A/B; SEP: Analyzing Data, Modeling; CCC: Patterns, Scale, Stability and Change; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14); FL SC.912.E.5.3/9; VA AS.3(g-h,k); MA STE HS-ESS1-2.

Galaxy Mergers and Tidal Interactions: Which tail, bridge, distortion, starburst, or orbital feature best indicates a past or ongoing galaxy interaction?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.234 - Galaxy Mergers and Tidal Interactions: NGSS HS-ESS1-2/4; DCI ESS1.A/B; SEP: Analyzing Data, Modeling; CCC: Patterns, Scale, Stability and Change; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14); FL SC.912.E.5.3/9; VA AS.3(g-h,k); MA STE HS-ESS1-2.

Starburst Galaxies: Which gas supply, merger, infrared output, or emission-line signature best explains an unusually high star-formation rate? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.235 - Starburst Galaxies: NGSS HS-ESS1-2/4; DCI ESS1.A/B; SEP: Analyzing Data, Modeling; CCC: Patterns, Scale, Stability and Change; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14); FL SC.912.E.5.3/9; VA AS.3(g-h,k); MA STE HS-ESS1-2.

Active Galactic Nuclei and Quasars: Which compact, variable, luminous, or spectral feature best indicates accretion onto a supermassive black hole?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.236 - Active Galactic Nuclei and Quasars: NGSS HS-ESS1-2/4; DCI ESS1.A/B; SEP: Analyzing Data, Modeling; CCC: Patterns, Scale, Stability and Change; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14); FL SC.912.E.5.3/9; VA AS.3(g-h,k); MA STE HS-ESS1-2.

Jets, Radio Lobes, and Black-Hole Feedback: Which magnetic and accretion process best explains relativistic jets and their effects on surrounding gas?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.237 - Jets, Radio Lobes, and Black-Hole Feedback: NGSS HS-ESS1-2/4; DCI ESS1.A/B; SEP: Analyzing Data, Modeling; CCC: Patterns, Scale, Stability and Change; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14); FL SC.912.E.5.3/9; VA AS.3(g-h,k); MA STE HS-ESS1-2.

Gravitational Lensing by Galaxies and Clusters: Which image pattern or time delay is consistent with strong, weak, or microlensing by intervening mass?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.238 - Gravitational Lensing by Galaxies and Clusters: NGSS HS-ESS1-2/4; DCI ESS1.A/B; SEP: Analyzing Data, Modeling; CCC: Patterns, Scale, Stability and Change; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14); FL SC.912.E.5.3/9; VA AS.3(g-h,k); MA STE HS-ESS1-2.

The Cosmic Web: Which distribution of galaxies best illustrates filaments, walls, clusters, and voids produced by gravitational growth? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.239 - The Cosmic Web: NGSS HS-ESS1-2/4; DCI ESS1.A/B; SEP: Analyzing Data, Modeling; CCC: Patterns, Scale, Stability and Change; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14); FL SC.912.E.5.3/9; VA AS.3(g-h,k); MA STE HS-ESS1-2.

Galaxy Evolution and Lookback Time: Which observation of a distant galaxy should be interpreted as an earlier evolutionary stage because of light-travel time?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.240 - Galaxy Evolution and Lookback Time: NGSS HS-ESS1-2/4; DCI ESS1.A/B; SEP: Analyzing Data, Modeling; CCC: Patterns, Scale, Stability and Change; CCSS RST.11-12.7; CCSS Math HSS-ID; TEKS §112.48(c)(14); FL SC.912.E.5.3/9; VA AS.3(g-h,k); MA STE HS-ESS1-2.

The Cosmological Principle: Which large-scale observation is consistent with a universe that is approximately homogeneous and isotropic when viewed on sufficiently large scales?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.241 - The Cosmological Principle: NGSS HS-ESS1-2; DCI ESS1.A; SEP: Constructing Explanations, Analyzing Evidence; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7,8; CCSS Math HSN-Q, HSF-LE; TEKS §112.48(c)(15); FL SC.912.E.5.9/11; VA AS.3(i-k); MA STE HS-ESS1-2.

The Hubble-Lemaître Law: Given galaxy distances and recession speeds, which graph, slope, or inference correctly represents cosmic expansion? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.242 - The Hubble-Lemaître Law: NGSS HS-ESS1-2; DCI ESS1.A; SEP: Constructing Explanations, Analyzing Evidence; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7,8; CCSS Math HSN-Q, HSF-LE; TEKS §112.48(c)(15); FL SC.912.E.5.9/11; VA AS.3(i-k); MA STE HS-ESS1-2.

Expansion of Space: Which analogy or statement correctly distinguishes expansion of space from an explosion into preexisting empty space?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.243 - Expansion of Space: NGSS HS-ESS1-2; DCI ESS1.A; SEP: Constructing Explanations, Analyzing Evidence; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7,8; CCSS Math HSN-Q, HSF-LE; TEKS §112.48(c)(15); FL SC.912.E.5.9/11; VA AS.3(i-k); MA STE HS-ESS1-2.

Cosmological Redshift and Scale Factor: Which interpretation correctly connects observed wavelength stretching to the expansion of the universe?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.244 - Cosmological Redshift and Scale Factor: NGSS HS-ESS1-2; DCI ESS1.A; SEP: Constructing Explanations, Analyzing Evidence; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7,8; CCSS Math HSN-Q, HSF-LE; TEKS §112.48(c)(15); FL SC.912.E.5.9/11; VA AS.3(i-k); MA STE HS-ESS1-2.

Evidence for the Big Bang Model: Which combination of expansion, cosmic background radiation, light-element abundance, and large-scale structure most strongly supports the Big Bang model?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.245 - Evidence for the Big Bang Model: NGSS HS-ESS1-2; DCI ESS1.A; SEP: Constructing Explanations, Analyzing Evidence; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7,8; CCSS Math HSN-Q, HSF-LE; TEKS §112.48(c)(15); FL SC.912.E.5.9/11; VA AS.3(i-k); MA STE HS-ESS1-2.

The Cosmic Microwave Background: Which temperature, spectrum, anisotropy, or origin statement correctly describes the cosmic microwave background?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.246 - The Cosmic Microwave Background: NGSS HS-ESS1-2; DCI ESS1.A; SEP: Constructing Explanations, Analyzing Evidence; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7,8; CCSS Math HSN-Q, HSF-LE; TEKS §112.48(c)(15); FL SC.912.E.5.9/11; VA AS.3(i-k); MA STE HS-ESS1-2.

Primordial Nucleosynthesis: Which early-universe conditions and predicted abundances best explain the cosmic amounts of hydrogen, helium, and trace light elements? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.247 - Primordial Nucleosynthesis: NGSS HS-ESS1-2; DCI ESS1.A; SEP: Constructing Explanations, Analyzing Evidence; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7,8; CCSS Math HSN-Q, HSF-LE; TEKS §112.48(c)(15); FL SC.912.E.5.9/11; VA AS.3(i-k); MA STE HS-ESS1-2.

Estimating the Age of the Universe: Which measurement or model parameter best constrains cosmic age, and why is a simple reciprocal of the Hubble constant only an approximation?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.248 - Estimating the Age of the Universe: NGSS HS-ESS1-2; DCI ESS1.A; SEP: Constructing Explanations, Analyzing Evidence; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7,8; CCSS Math HSN-Q, HSF-LE; TEKS §112.48(c)(15); FL SC.912.E.5.9/11; VA AS.3(i-k); MA STE HS-ESS1-2.

Dark Matter Evidence: Which observation - rotation curves, lensing, cluster dynamics, structure formation, or background anisotropy - provides indirect evidence for dark matter?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.249 - Dark Matter Evidence: NGSS HS-ESS1-2; DCI ESS1.A; SEP: Constructing Explanations, Analyzing Evidence; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7,8; CCSS Math HSN-Q, HSF-LE; TEKS §112.48(c)(15); FL SC.912.E.5.9/11; VA AS.3(i-k); MA STE HS-ESS1-2.

Dark Energy and Accelerated Expansion: Which supernova or expansion-history result best supports the conclusion that cosmic expansion is accelerating?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.250 - Dark Energy and Accelerated Expansion: NGSS HS-ESS1-2; DCI ESS1.A; SEP: Constructing Explanations, Analyzing Evidence; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7,8; CCSS Math HSN-Q, HSF-LE; TEKS §112.48(c)(15); FL SC.912.E.5.9/11; VA AS.3(i-k); MA STE HS-ESS1-2.

Cosmic Density and Spatial Geometry: Which density comparison corresponds to open, flat, or closed spatial geometry in a simplified cosmological model?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.251 - Cosmic Density and Spatial Geometry: NGSS HS-ESS1-2; DCI ESS1.A; SEP: Constructing Explanations, Analyzing Evidence; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7,8; CCSS Math HSN-Q, HSF-LE; TEKS §112.48(c)(15); FL SC.912.E.5.9/11; VA AS.3(i-k); MA STE HS-ESS1-2.

Possible Futures of the Universe: Which future scenario is consistent with the stated matter density, dark-energy behavior, and expansion rate?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.252 - Possible Futures of the Universe: NGSS HS-ESS1-2; DCI ESS1.A; SEP: Constructing Explanations, Analyzing Evidence; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7,8; CCSS Math HSN-Q, HSF-LE; TEKS §112.48(c)(15); FL SC.912.E.5.9/11; VA AS.3(i-k); MA STE HS-ESS1-2.

Inflation and Early-Universe Problems: Which qualitative claim best explains how a brief period of inflation addresses horizon, flatness, or relic problems?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.253 - Inflation and Early-Universe Problems: NGSS HS-ESS1-2; DCI ESS1.A; SEP: Constructing Explanations, Analyzing Evidence; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7,8; CCSS Math HSN-Q, HSF-LE; TEKS §112.48(c)(15); FL SC.912.E.5.9/11; VA AS.3(i-k); MA STE HS-ESS1-2.

Recombination, Dark Ages, and First Light: Which sequence correctly orders recombination, photon decoupling, the dark ages, first stars, and reionization?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.254 - Recombination, Dark Ages, and First Light: NGSS HS-ESS1-2; DCI ESS1.A; SEP: Constructing Explanations, Analyzing Evidence; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7,8; CCSS Math HSN-Q, HSF-LE; TEKS §112.48(c)(15); FL SC.912.E.5.9/11; VA AS.3(i-k); MA STE HS-ESS1-2.

Observable-Universe Limits and Model Uncertainty: Which statement correctly distinguishes the observable universe from the entire universe and identifies an important uncertainty or limit in cosmological inference?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.255 - Observable-Universe Limits and Model Uncertainty: NGSS HS-ESS1-2; DCI ESS1.A; SEP: Constructing Explanations, Analyzing Evidence; CCC: Scale/Proportion/Quantity, Stability and Change; CCSS RST.11-12.1,7,8; CCSS Math HSN-Q, HSF-LE; TEKS §112.48(c)(15); FL SC.912.E.5.9/11; VA AS.3(i-k); MA STE HS-ESS1-2.

Exoplanet Types and System Architectures: Which mass, radius, temperature, orbit, or composition best classifies an exoplanet or planetary system?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.256 - Exoplanet Types and System Architectures: NGSS HS-ESS1-4/6 and HS-LS connections; DCI ESS1.B/C; SEP: Analyzing Data, Argument from Evidence; CCC: Patterns, Systems; CCSS RST.11-12.7,8; CCSS Math HSN-Q, HSS-ID; ISTE 1.5; TEKS §112.48(c)(11)(D),(16)(C); FL SC.912.E.5.2/3/7; VA AS.4(g); MA STE HS-ESS1.

The Transit Method: Which periodic light-curve pattern is most consistent with a planetary transit rather than stellar variability or an eclipsing binary? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.257 - The Transit Method: NGSS HS-ESS1-4/6 and HS-LS connections; DCI ESS1.B/C; SEP: Analyzing Data, Argument from Evidence; CCC: Patterns, Systems; CCSS RST.11-12.7,8; CCSS Math HSN-Q, HSS-ID; ISTE 1.5; TEKS §112.48(c)(11)(D),(16)(C); FL SC.912.E.5.2/3/7; VA AS.4(g); MA STE HS-ESS1.

The Radial-Velocity Method: Which periodic spectral shift indicates a planet-induced stellar wobble, and what minimum property of the planet can be inferred?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.258 - The Radial-Velocity Method: NGSS HS-ESS1-4/6 and HS-LS connections; DCI ESS1.B/C; SEP: Analyzing Data, Argument from Evidence; CCC: Patterns, Systems; CCSS RST.11-12.7,8; CCSS Math HSN-Q, HSS-ID; ISTE 1.5; TEKS §112.48(c)(11)(D),(16)(C); FL SC.912.E.5.2/3/7; VA AS.4(g); MA STE HS-ESS1.

Direct Imaging: Which combination of wide separation, youth, infrared brightness, coronagraphy, or wavefront control most favors direct detection?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.259 - Direct Imaging: NGSS HS-ESS1-4/6 and HS-LS connections; DCI ESS1.B/C; SEP: Analyzing Data, Argument from Evidence; CCC: Patterns, Systems; CCSS RST.11-12.7,8; CCSS Math HSN-Q, HSS-ID; ISTE 1.5; TEKS §112.48(c)(11)(D),(16)(C); FL SC.912.E.5.2/3/7; VA AS.4(g); MA STE HS-ESS1.

Gravitational Microlensing: Which temporary brightening pattern best indicates a planet around a foreground lens star, and what limits follow-up?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.260 - Gravitational Microlensing: NGSS HS-ESS1-4/6 and HS-LS connections; DCI ESS1.B/C; SEP: Analyzing Data, Argument from Evidence; CCC: Patterns, Systems; CCSS RST.11-12.7,8; CCSS Math HSN-Q, HSS-ID; ISTE 1.5; TEKS §112.48(c)(11)(D),(16)(C); FL SC.912.E.5.2/3/7; VA AS.4(g); MA STE HS-ESS1.

Astrometry and Timing Methods: Which positional wobble or timing variation best supports an unseen companion?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.261 - Astrometry and Timing Methods: NGSS HS-ESS1-4/6 and HS-LS connections; DCI ESS1.B/C; SEP: Analyzing Data, Argument from Evidence; CCC: Patterns, Systems; CCSS RST.11-12.7,8; CCSS Math HSN-Q, HSS-ID; ISTE 1.5; TEKS §112.48(c)(11)(D),(16)(C); FL SC.912.E.5.2/3/7; VA AS.4(g); MA STE HS-ESS1.

Planetary Radius from Transit Depth: Given a transit depth and stellar radius, which calculation correctly estimates the planet’s radius?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.262 - Planetary Radius from Transit Depth: NGSS HS-ESS1-4/6 and HS-LS connections; DCI ESS1.B/C; SEP: Analyzing Data, Argument from Evidence; CCC: Patterns, Systems; CCSS RST.11-12.7,8; CCSS Math HSN-Q, HSS-ID; ISTE 1.5; TEKS §112.48(c)(11)(D),(16)(C); FL SC.912.E.5.2/3/7; VA AS.4(g); MA STE HS-ESS1.

Planetary Mass and Orbit from Radial Velocity: Given velocity amplitude, stellar mass, period, or inclination information, which inference about planet mass or orbit is justified?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.263 - Planetary Mass and Orbit from Radial Velocity: NGSS HS-ESS1-4/6 and HS-LS connections; DCI ESS1.B/C; SEP: Analyzing Data, Argument from Evidence; CCC: Patterns, Systems; CCSS RST.11-12.7,8; CCSS Math HSN-Q, HSS-ID; ISTE 1.5; TEKS §112.48(c)(11)(D),(16)(C); FL SC.912.E.5.2/3/7; VA AS.4(g); MA STE HS-ESS1.

Bulk Density and Composition: Given mass and radius, which density and likely composition - rocky, water-rich, gas-dominated, or ambiguous - are most reasonable?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.264 - Bulk Density and Composition: NGSS HS-ESS1-4/6 and HS-LS connections; DCI ESS1.B/C; SEP: Analyzing Data, Argument from Evidence; CCC: Patterns, Systems; CCSS RST.11-12.7,8; CCSS Math HSN-Q, HSS-ID; ISTE 1.5; TEKS §112.48(c)(11)(D),(16)(C); FL SC.912.E.5.2/3/7; VA AS.4(g); MA STE HS-ESS1.

Equilibrium Temperature and Habitable Zones: Which orbit, albedo, stellar luminosity, or greenhouse assumption best predicts equilibrium temperature or habitable-zone placement?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.265 - Equilibrium Temperature and Habitable Zones: NGSS HS-ESS1-4/6 and HS-LS connections; DCI ESS1.B/C; SEP: Analyzing Data, Argument from Evidence; CCC: Patterns, Systems; CCSS RST.11-12.7,8; CCSS Math HSN-Q, HSS-ID; ISTE 1.5; TEKS §112.48(c)(11)(D),(16)(C); FL SC.912.E.5.2/3/7; VA AS.4(g); MA STE HS-ESS1.

Exoplanet Atmospheres: Which transit, eclipse, phase-curve, or direct spectrum best reveals atmospheric composition, clouds, temperature, or circulation?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.266 - Exoplanet Atmospheres: NGSS HS-ESS1-4/6 and HS-LS connections; DCI ESS1.B/C; SEP: Analyzing Data, Argument from Evidence; CCC: Patterns, Systems; CCSS RST.11-12.7,8; CCSS Math HSN-Q, HSS-ID; ISTE 1.5; TEKS §112.48(c)(11)(D),(16)(C); FL SC.912.E.5.2/3/7; VA AS.4(g); MA STE HS-ESS1.

Biosignatures and False Positives: Which combination of gases or surface signals is most persuasive as a biosignature, and which abiotic process could imitate it?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.267 - Biosignatures and False Positives: NGSS HS-ESS1-4/6 and HS-LS connections; DCI ESS1.B/C; SEP: Analyzing Data, Argument from Evidence; CCC: Patterns, Systems; CCSS RST.11-12.7,8; CCSS Math HSN-Q, HSS-ID; ISTE 1.5; TEKS §112.48(c)(11)(D),(16)(C); FL SC.912.E.5.2/3/7; VA AS.4(g); MA STE HS-ESS1.

Requirements for Life and Extremophiles: Which environmental condition is essential, favorable, or merely Earth-specific when evaluating potential habitability?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.268 - Requirements for Life and Extremophiles: NGSS HS-ESS1-4/6 and HS-LS connections; DCI ESS1.B/C; SEP: Analyzing Data, Argument from Evidence; CCC: Patterns, Systems; CCSS RST.11-12.7,8; CCSS Math HSN-Q, HSS-ID; ISTE 1.5; TEKS §112.48(c)(11)(D),(16)(C); FL SC.912.E.5.2/3/7; VA AS.4(g); MA STE HS-ESS1.

The Drake Equation, SETI, and Technosignatures: Which factor or observation changes an estimate of communicative civilizations, and which signal would require careful natural-source exclusion? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.269 - The Drake Equation, SETI, and Technosignatures: NGSS HS-ESS1-4/6 and HS-LS connections; DCI ESS1.B/C; SEP: Analyzing Data, Argument from Evidence; CCC: Patterns, Systems; CCSS RST.11-12.7,8; CCSS Math HSN-Q, HSS-ID; ISTE 1.5; TEKS §112.48(c)(11)(D),(16)(C); FL SC.912.E.5.2/3/7; VA AS.4(g); MA STE HS-ESS1.

Planetary Protection and Life-Detection Ethics: Which policy best prevents forward or back contamination and supports responsible communication of a possible life-detection claim? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.270 - Planetary Protection and Life-Detection Ethics: NGSS HS-ESS1-4/6 and HS-LS connections; DCI ESS1.B/C; SEP: Analyzing Data, Argument from Evidence; CCC: Patterns, Systems; CCSS RST.11-12.7,8; CCSS Math HSN-Q, HSS-ID; ISTE 1.5; TEKS §112.48(c)(11)(D),(16)(C); FL SC.912.E.5.2/3/7; VA AS.4(g); MA STE HS-ESS1.

Rocket Propulsion and Newton’s Third Law: Which momentum exchange best explains rocket thrust in an atmosphere or vacuum?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.271 - Rocket Propulsion and Newton’s Third Law: NGSS HS-ETS1-1/2/3/4, HS-PS2-1/4, HS-PS3-3; DCI ETS1.A-C, PS2.A/B; SEP: Designing Solutions, Using Mathematics; CCC: Systems, Structure and Function; CCSS Math HSN-Q, HSA-CED; WHST.11-12.7; ISTE 1.4, 1.5, 1.7; TEKS §112.48(c)(16)(A-B,D); FL SC.912.E.5.7; VA AS.1, AS.2(f); MA STE HS-ETS1.

Rocket Performance and Mass Fraction: Which design change best increases achievable velocity while accounting for propellant mass, exhaust speed, and staging?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.272 - Rocket Performance and Mass Fraction: NGSS HS-ETS1-1/2/3/4, HS-PS2-1/4, HS-PS3-3; DCI ETS1.A-C, PS2.A/B; SEP: Designing Solutions, Using Mathematics; CCC: Systems, Structure and Function; CCSS Math HSN-Q, HSA-CED; WHST.11-12.7; ISTE 1.4, 1.5, 1.7; TEKS §112.48(c)(16)(A-B,D); FL SC.912.E.5.7; VA AS.1, AS.2(f); MA STE HS-ETS1.

Launch, Parking Orbits, and Inclination: Which launch direction, site, or maneuver best reaches the desired orbit while using Earth’s rotation effectively?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.273 - Launch, Parking Orbits, and Inclination: NGSS HS-ETS1-1/2/3/4, HS-PS2-1/4, HS-PS3-3; DCI ETS1.A-C, PS2.A/B; SEP: Designing Solutions, Using Mathematics; CCC: Systems, Structure and Function; CCSS Math HSN-Q, HSA-CED; WHST.11-12.7; ISTE 1.4, 1.5, 1.7; TEKS §112.48(c)(16)(A-B,D); FL SC.912.E.5.7; VA AS.1, AS.2(f); MA STE HS-ETS1.

Satellite Orbits and Applications: Which low-Earth, medium-Earth, geostationary, polar, or highly elliptical orbit best serves the stated mission?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.274 - Satellite Orbits and Applications: NGSS HS-ETS1-1/2/3/4, HS-PS2-1/4, HS-PS3-3; DCI ETS1.A-C, PS2.A/B; SEP: Designing Solutions, Using Mathematics; CCC: Systems, Structure and Function; CCSS Math HSN-Q, HSA-CED; WHST.11-12.7; ISTE 1.4, 1.5, 1.7; TEKS §112.48(c)(16)(A-B,D); FL SC.912.E.5.7; VA AS.1, AS.2(f); MA STE HS-ETS1.

Robotic Mission Types: Which flyby, orbiter, lander, rover, penetrator, balloon, or sample-return design best addresses the science objective? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.275 - Robotic Mission Types: NGSS HS-ETS1-1/2/3/4, HS-PS2-1/4, HS-PS3-3; DCI ETS1.A-C, PS2.A/B; SEP: Designing Solutions, Using Mathematics; CCC: Systems, Structure and Function; CCSS Math HSN-Q, HSA-CED; WHST.11-12.7; ISTE 1.4, 1.5, 1.7; TEKS §112.48(c)(16)(A-B,D); FL SC.912.E.5.7; VA AS.1, AS.2(f); MA STE HS-ETS1.

Human Spaceflight Systems: Which combination of propulsion, habitat, power, communication, navigation, and thermal control best satisfies a crewed mission requirement?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.276 - Human Spaceflight Systems: NGSS HS-ETS1-1/2/3/4, HS-PS2-1/4, HS-PS3-3; DCI ETS1.A-C, PS2.A/B; SEP: Designing Solutions, Using Mathematics; CCC: Systems, Structure and Function; CCSS Math HSN-Q, HSA-CED; WHST.11-12.7; ISTE 1.4, 1.5, 1.7; TEKS §112.48(c)(16)(A-B,D); FL SC.912.E.5.7; VA AS.1, AS.2(f); MA STE HS-ETS1.

Life Support, Radiation, and Microgravity: Which hazard and mitigation correctly pair for closed-loop life support, radiation exposure, bone loss, muscle loss, or isolation?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.277 - Life Support, Radiation, and Microgravity: NGSS HS-ETS1-1/2/3/4, HS-PS2-1/4, HS-PS3-3; DCI ETS1.A-C, PS2.A/B; SEP: Designing Solutions, Using Mathematics; CCC: Systems, Structure and Function; CCSS Math HSN-Q, HSA-CED; WHST.11-12.7; ISTE 1.4, 1.5, 1.7; TEKS §112.48(c)(16)(A-B,D); FL SC.912.E.5.7; VA AS.1, AS.2(f); MA STE HS-ETS1.

Remote Sensing, In Situ Analysis, and Sample Return: Which measurement approach provides the strongest evidence for the stated planetary question, and what trade-off does it impose?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.278 - Remote Sensing, In Situ Analysis, and Sample Return: NGSS HS-ETS1-1/2/3/4, HS-PS2-1/4, HS-PS3-3; DCI ETS1.A-C, PS2.A/B; SEP: Designing Solutions, Using Mathematics; CCC: Systems, Structure and Function; CCSS Math HSN-Q, HSA-CED; WHST.11-12.7; ISTE 1.4, 1.5, 1.7; TEKS §112.48(c)(16)(A-B,D); FL SC.912.E.5.7; VA AS.1, AS.2(f); MA STE HS-ETS1.

Launch Windows, Trajectories, and Communication Delay: Which timing or trajectory best uses planetary alignment, and which operational consequence follows from signal travel time?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.279 - Launch Windows, Trajectories, and Communication Delay: NGSS HS-ETS1-1/2/3/4, HS-PS2-1/4, HS-PS3-3; DCI ETS1.A-C, PS2.A/B; SEP: Designing Solutions, Using Mathematics; CCC: Systems, Structure and Function; CCSS Math HSN-Q, HSA-CED; WHST.11-12.7; ISTE 1.4, 1.5, 1.7; TEKS §112.48(c)(16)(A-B,D); FL SC.912.E.5.7; VA AS.1, AS.2(f); MA STE HS-ETS1.

Mission Design Criteria and Constraints: Which design best satisfies stated science goals, mass, cost, power, reliability, safety, and schedule constraints?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.280 - Mission Design Criteria and Constraints: NGSS HS-ETS1-1/2/3/4, HS-PS2-1/4, HS-PS3-3; DCI ETS1.A-C, PS2.A/B; SEP: Designing Solutions, Using Mathematics; CCC: Systems, Structure and Function; CCSS Math HSN-Q, HSA-CED; WHST.11-12.7; ISTE 1.4, 1.5, 1.7; TEKS §112.48(c)(16)(A-B,D); FL SC.912.E.5.7; VA AS.1, AS.2(f); MA STE HS-ETS1.

Space Telescope Mission Architecture: Which orbit, shielding, cooling, aperture, serviceability, or wavelength choice best matches a proposed space observatory?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.281 - Space Telescope Mission Architecture: NGSS HS-ETS1-1/2/3/4, HS-PS2-1/4, HS-PS3-3; DCI ETS1.A-C, PS2.A/B; SEP: Designing Solutions, Using Mathematics; CCC: Systems, Structure and Function; CCSS Math HSN-Q, HSA-CED; WHST.11-12.7; ISTE 1.4, 1.5, 1.7; TEKS §112.48(c)(16)(A-B,D); FL SC.912.E.5.7; VA AS.1, AS.2(f); MA STE HS-ETS1.

Near-Earth Object Detection and Characterization: Which survey cadence, orbit determination, size estimate, or composition measurement most improves impact-risk assessment?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.282 - Near-Earth Object Detection and Characterization: NGSS HS-ETS1-1/2/3/4, HS-PS2-1/4, HS-PS3-3; DCI ETS1.A-C, PS2.A/B; SEP: Designing Solutions, Using Mathematics; CCC: Systems, Structure and Function; CCSS Math HSN-Q, HSA-CED; WHST.11-12.7; ISTE 1.4, 1.5, 1.7; TEKS §112.48(c)(16)(A-B,D); FL SC.912.E.5.7; VA AS.1, AS.2(f); MA STE HS-ETS1.

Planetary-Defense Risk and Probability: Which interpretation correctly combines impact probability, object size, warning time, and consequence without overstating certainty?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.283 - Planetary-Defense Risk and Probability: NGSS HS-ETS1-1/2/3/4, HS-PS2-1/4, HS-PS3-3; DCI ETS1.A-C, PS2.A/B; SEP: Designing Solutions, Using Mathematics; CCC: Systems, Structure and Function; CCSS Math HSN-Q, HSA-CED; WHST.11-12.7; ISTE 1.4, 1.5, 1.7; TEKS §112.48(c)(16)(A-B,D); FL SC.912.E.5.7; VA AS.1, AS.2(f); MA STE HS-ETS1.

Deflection and Mitigation Strategies: Which kinetic impactor, gravity tractor, reconnaissance, evacuation, or other response best fits the stated object and warning time?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.284 - Deflection and Mitigation Strategies: NGSS HS-ETS1-1/2/3/4, HS-PS2-1/4, HS-PS3-3; DCI ETS1.A-C, PS2.A/B; SEP: Designing Solutions, Using Mathematics; CCC: Systems, Structure and Function; CCSS Math HSN-Q, HSA-CED; WHST.11-12.7; ISTE 1.4, 1.5, 1.7; TEKS §112.48(c)(16)(A-B,D); FL SC.912.E.5.7; VA AS.1, AS.2(f); MA STE HS-ETS1.

Space Debris, Sustainability, and Resource Use: Which engineering or policy choice best reduces collision risk, protects orbital environments, and weighs benefits and costs of space-resource activity? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.285 - Space Debris, Sustainability, and Resource Use: NGSS HS-ETS1-1/2/3/4, HS-PS2-1/4, HS-PS3-3; DCI ETS1.A-C, PS2.A/B; SEP: Designing Solutions, Using Mathematics; CCC: Systems, Structure and Function; CCSS Math HSN-Q, HSA-CED; WHST.11-12.7; ISTE 1.4, 1.5, 1.7; TEKS §112.48(c)(16)(A-B,D); FL SC.912.E.5.7; VA AS.1, AS.2(f); MA STE HS-ETS1.

Light Pollution and Dark-Sky Protection: Which lighting design or policy best reduces skyglow, glare, light trespass, energy waste, and ecological impact while preserving safety?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.286 - Light Pollution and Dark-Sky Protection: NGSS HS-ESS3-4/6 connections and SEPs; SEP: Obtaining/Evaluating/Communicating Information, Argument from Evidence; CCC: Cause and Effect, Systems; CCSS RST.11-12.6/8/9; WHST.11-12.1/7/8; ISTE 1.2, 1.3, 1.6, 1.7; TEKS §112.48(c)(4),(16)(D-F); FL SC.912.E.5.7; VA AS.1(f), AS.2(f); MA STE HS-ESS3/HS-ETS1.

Radio-Frequency Interference: Which source, frequency-management practice, or protected zone best preserves sensitive radio-astronomy observations?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.287 - Radio-Frequency Interference: NGSS HS-ESS3-4/6 connections and SEPs; SEP: Obtaining/Evaluating/Communicating Information, Argument from Evidence; CCC: Cause and Effect, Systems; CCSS RST.11-12.6/8/9; WHST.11-12.1/7/8; ISTE 1.2, 1.3, 1.6, 1.7; TEKS §112.48(c)(4),(16)(D-F); FL SC.912.E.5.7; VA AS.1(f), AS.2(f); MA STE HS-ESS3/HS-ETS1.

Satellite Constellations and Optical Astronomy: Which evidence-based mitigation best reduces streaks, brightness, data loss, or scheduling conflicts caused by large satellite constellations?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.288 - Satellite Constellations and Optical Astronomy: NGSS HS-ESS3-4/6 connections and SEPs; SEP: Obtaining/Evaluating/Communicating Information, Argument from Evidence; CCC: Cause and Effect, Systems; CCSS RST.11-12.6/8/9; WHST.11-12.1/7/8; ISTE 1.2, 1.3, 1.6, 1.7; TEKS §112.48(c)(4),(16)(D-F); FL SC.912.E.5.7; VA AS.1(f), AS.2(f); MA STE HS-ESS3/HS-ETS1.

Astronomy and Earth Monitoring: Which astronomical or space-based technology best supports climate, weather, hazard, navigation, or environmental observation?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.289 - Astronomy and Earth Monitoring: NGSS HS-ESS3-4/6 connections and SEPs; SEP: Obtaining/Evaluating/Communicating Information, Argument from Evidence; CCC: Cause and Effect, Systems; CCSS RST.11-12.6/8/9; WHST.11-12.1/7/8; ISTE 1.2, 1.3, 1.6, 1.7; TEKS §112.48(c)(4),(16)(D-F); FL SC.912.E.5.7; VA AS.1(f), AS.2(f); MA STE HS-ESS3/HS-ETS1.

Open Data, Citizen Science, and Amateur Astronomy: Which project design best uses public data or volunteer observations while maintaining training, validation, attribution, and data quality?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.290 - Open Data, Citizen Science, and Amateur Astronomy: NGSS HS-ESS3-4/6 connections and SEPs; SEP: Obtaining/Evaluating/Communicating Information, Argument from Evidence; CCC: Cause and Effect, Systems; CCSS RST.11-12.6/8/9; WHST.11-12.1/7/8; ISTE 1.2, 1.3, 1.6, 1.7; TEKS §112.48(c)(4),(16)(D-F); FL SC.912.E.5.7; VA AS.1(f), AS.2(f); MA STE HS-ESS3/HS-ETS1.

Evaluating Astronomy News and Press Releases: Which source or claim is most credible based on methods, evidence, uncertainty, peer review, and independent confirmation? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.291 - Evaluating Astronomy News and Press Releases: NGSS HS-ESS3-4/6 connections and SEPs; SEP: Obtaining/Evaluating/Communicating Information, Argument from Evidence; CCC: Cause and Effect, Systems; CCSS RST.11-12.6/8/9; WHST.11-12.1/7/8; ISTE 1.2, 1.3, 1.6, 1.7; TEKS §112.48(c)(4),(16)(D-F); FL SC.912.E.5.7; VA AS.1(f), AS.2(f); MA STE HS-ESS3/HS-ETS1.

Preprints, Peer Review, and Scientific Consensus: Which statement correctly distinguishes a preliminary result, a peer-reviewed finding, and a conclusion supported by converging evidence?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.292 - Preprints, Peer Review, and Scientific Consensus: NGSS HS-ESS3-4/6 connections and SEPs; SEP: Obtaining/Evaluating/Communicating Information, Argument from Evidence; CCC: Cause and Effect, Systems; CCSS RST.11-12.6/8/9; WHST.11-12.1/7/8; ISTE 1.2, 1.3, 1.6, 1.7; TEKS §112.48(c)(4),(16)(D-F); FL SC.912.E.5.7; VA AS.1(f), AS.2(f); MA STE HS-ESS3/HS-ETS1.

Uncertainty, Probability, and Responsible Communication: Which wording most accurately communicates confidence, limitations, and alternative explanations without exaggeration? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.293 - Uncertainty, Probability, and Responsible Communication: NGSS HS-ESS3-4/6 connections and SEPs; SEP: Obtaining/Evaluating/Communicating Information, Argument from Evidence; CCC: Cause and Effect, Systems; CCSS RST.11-12.6/8/9; WHST.11-12.1/7/8; ISTE 1.2, 1.3, 1.6, 1.7; TEKS §112.48(c)(4),(16)(D-F); FL SC.912.E.5.7; VA AS.1(f), AS.2(f); MA STE HS-ESS3/HS-ETS1.

Misinformation, Images, and Data Authenticity: Which check best detects a misleading scale, altered image, false color interpretation, fabricated citation, or unsupported astronomical claim?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.294 - Misinformation, Images, and Data Authenticity: NGSS HS-ESS3-4/6 connections and SEPs; SEP: Obtaining/Evaluating/Communicating Information, Argument from Evidence; CCC: Cause and Effect, Systems; CCSS RST.11-12.6/8/9; WHST.11-12.1/7/8; ISTE 1.2, 1.3, 1.6, 1.7; TEKS §112.48(c)(4),(16)(D-F); FL SC.912.E.5.7; VA AS.1(f), AS.2(f); MA STE HS-ESS3/HS-ETS1.

Ethics, Inclusion, and Credit in Astronomy: Which practice best supports fair authorship, respectful collaboration, accessibility, research integrity, and inclusion?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.295 - Ethics, Inclusion, and Credit in Astronomy: NGSS HS-ESS3-4/6 connections and SEPs; SEP: Obtaining/Evaluating/Communicating Information, Argument from Evidence; CCC: Cause and Effect, Systems; CCSS RST.11-12.6/8/9; WHST.11-12.1/7/8; ISTE 1.2, 1.3, 1.6, 1.7; TEKS §112.48(c)(4),(16)(D-F); FL SC.912.E.5.7; VA AS.1(f), AS.2(f); MA STE HS-ESS3/HS-ETS1.

Astronomy Careers and Educational Pathways: Which career best matches the stated interests in observation, theory, computing, engineering, education, communication, or mission operations?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.296 - Astronomy Careers and Educational Pathways: NGSS HS-ESS3-4/6 connections and SEPs; SEP: Obtaining/Evaluating/Communicating Information, Argument from Evidence; CCC: Cause and Effect, Systems; CCSS RST.11-12.6/8/9; WHST.11-12.1/7/8; ISTE 1.2, 1.3, 1.6, 1.7; TEKS §112.48(c)(4),(16)(D-F); FL SC.912.E.5.7; VA AS.1(f), AS.2(f); MA STE HS-ESS3/HS-ETS1.

Computational Astronomy and Data Science: Which algorithmic, statistical, visualization, database, or machine-learning approach best addresses the stated astronomical data problem? Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.297 - Computational Astronomy and Data Science: NGSS HS-ESS3-4/6 connections and SEPs; SEP: Obtaining/Evaluating/Communicating Information, Argument from Evidence; CCC: Cause and Effect, Systems; CCSS RST.11-12.6/8/9; WHST.11-12.1/7/8; ISTE 1.2, 1.3, 1.6, 1.7; TEKS §112.48(c)(4),(16)(D-F); FL SC.912.E.5.7; VA AS.1(f), AS.2(f); MA STE HS-ESS3/HS-ETS1.

Current Missions and Discoveries: Which comparison best evaluates a recent mission or discovery using its instrument, evidence, limitations, and relationship to prior knowledge?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.298 - Current Missions and Discoveries: NGSS HS-ESS3-4/6 connections and SEPs; SEP: Obtaining/Evaluating/Communicating Information, Argument from Evidence; CCC: Cause and Effect, Systems; CCSS RST.11-12.6/8/9; WHST.11-12.1/7/8; ISTE 1.2, 1.3, 1.6, 1.7; TEKS §112.48(c)(4),(16)(D-F); FL SC.912.E.5.7; VA AS.1(f), AS.2(f); MA STE HS-ESS3/HS-ETS1.

Research Priorities and Cost-Benefit Decisions: Which funding or mission choice best balances scientific return, technical readiness, risk, cost, access, and broader societal value?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.299 - Research Priorities and Cost-Benefit Decisions: NGSS HS-ESS3-4/6 connections and SEPs; SEP: Obtaining/Evaluating/Communicating Information, Argument from Evidence; CCC: Cause and Effect, Systems; CCSS RST.11-12.6/8/9; WHST.11-12.1/7/8; ISTE 1.2, 1.3, 1.6, 1.7; TEKS §112.48(c)(4),(16)(D-F); FL SC.912.E.5.7; VA AS.1(f), AS.2(f); MA STE HS-ESS3/HS-ETS1.

International Cooperation, Cultural Heritage, and Synthesis: Which decision best combines international law, shared scientific goals, cultural-site respect, environmental stewardship, and multiple lines of astronomical evidence?. Aligned to High School Astronomy Standards Crosswalk (NGSS, CCSS, ISTE, TEKS, FL CPALMS, VA AS, MA STE) AST.300 - International Cooperation, Cultural Heritage, and Synthesis: NGSS HS-ESS3-4/6 connections and SEPs; SEP: Obtaining/Evaluating/Communicating Information, Argument from Evidence; CCC: Cause and Effect, Systems; CCSS RST.11-12.6/8/9; WHST.11-12.1/7/8; ISTE 1.2, 1.3, 1.6, 1.7; TEKS §112.48(c)(4),(16)(D-F); FL SC.912.E.5.7; VA AS.1(f), AS.2(f); MA STE HS-ESS3/HS-ETS1.