Free Printable WorksheetScienceGrade 9Science CurriculumNGSS HS-PS1-2, HS-PS1-5

9.36 Evidence of Chemical Reactions Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Physical Science with Earth and Science Science worksheet provides structured practice on 9.36 Evidence of Chemical Reactions. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Evidence of Chemical Reactions: MCQ focus: identify evidence such as temperature change, precipitate, gas, color change, odor, or light while avoiding false positives. Aligned to NGSS high school Physical Science, Earth and Space Science, and Engineering Design; NRC/DCI; SEP/CCC; CCSS math/literacy connections; selected CA NGSS, NYSSLS, Florida CPALMS, and Texas TEKS references NGSS HS-PS1-2, HS-PS1-5 - NGSS-aligned Evidence of Chemical Reactions: NGSS: HS-PS1-2; HS-PS1-5; NRC/DCI: PS1.B; SEP/CCC: Analyzing evidence / Cause and effect; Common: RST.9-10.8; State refs: CA/NYSSLS same HS-PS PE family; FL SC.912.P.8; TX IPC matter strand.

Whether you are an educator preparing classroom handouts, a tutor reinforcing weekly topics, or a parent supporting homeschool learning, this printable resource gives students the deliberate practice required to achieve subject fluency and master state standards.

Grade

Physical Science with Earth and Science

Subject

Science

Domain

Science Curriculum

Formats

PDF & DOCX

Sample Practice Problems

Preview the types of problems and questions covered in this worksheet

Below are sample questions representative of the exercises included on this worksheet and related 9.36 Evidence of Chemical Reactions skill assessments:

Problem 1Difficulty: Mastery

Use the final evidence table to answer: Which claim is best supported by the observations?

AClaim B, because dye dilution in the control proves reaction.

BClaim D, because a warmed lamp control is better evidence than products forming.

CClaim A, because the mixture produced gas and a precipitate while controls showed no changes.

DClaim C, because unchanged water proves every mixture reacts.

Solution & Explanation:The strongest claim uses observations that indicate products formed and compares them with controls. Gas and precipitate formation in the test mixture are stronger evidence than dye dilution or external warming.

Problem 2Difficulty: Mastery

Two liquids are mixed in a test tube near a sunny window. The thermometer rises 2 C, but no other changes occur. What is the best conclusion?

AThe 2 C rise definitely proves a precipitate formed.

BA reaction is possible, but the evidence is not conclusive because sunlight could have warmed the tube.

CSunlight cannot affect temperature readings.

DNo chemical reaction can ever produce a small temperature change.

Solution & Explanation:A small temperature change can be meaningful only if outside heating is ruled out. With sunlight as a possible cause and no other evidence, the conclusion should be cautious.

Problem 3Difficulty: Mastery

A candle is observed before and after lighting. Which observation belongs to burning rather than just melting?

AThe flame gives off light and heat as new gases form.

BWax near the wick becomes liquid.

CThe candle surface becomes smoother as wax softens.

DThe wax returns to solid when cooled.

Solution & Explanation:Melting and re-solidifying wax are physical changes. Burning produces light, heat, and new substances such as gases.

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QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Physical Science with Earth and Science Science students. It aligns with educational standard NGSS HS-PS1-2, HS-PS1-5 (NGSS: HS-PS1-2; HS-PS1-5; NRC/DCI: PS1.B; SEP/CCC: Analyzing evidence / Cause and effect; Common: RST.9-10.8; State refs: CA/NYSSLS same HS-PS PE family; FL SC.912.P.8; TX IPC matter strand.).