Free Printable WorksheetScienceGrade 8Science CurriculumMS-ESS1-2

8.102 Gravity and Orbital Motion Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Grade 8 Science worksheet provides structured practice on 8.102 Gravity and Orbital Motion. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Gravity and Orbital Motion - Which use best evidence that gravitational interactions are attractive and depend on mass and distance to explain orbital motion of planets and moons? (NGSS MS‑ESS1‑2; TEKS §112.28 Grade 8; FL NGSSS; VA SOL; MA STE)

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

Grade 8

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 8.102 Gravity and Orbital Motion skill assessments:

Problem 1Difficulty: Mastery

Which final claim best uses evidence that gravity is attractive and depends on mass and distance to explain orbital motion?

APlanets and moons orbit because gravity pushes objects outward when they get close

BPlanets and moons orbit because mutual gravity pulls objects inward, with stronger pulls from larger masses and shorter distances, while forward motion keeps paths curved

CPlanets orbit only because they are bright, and moons orbit only because they are cold

DOrbital motion proves mass and distance have no effect on gravity

Solution & Explanation:The best claim includes all key parts of the standard: gravity is mutual and attractive, it depends on mass and distance, and it works with forward motion to produce curved orbits.

Problem 2Difficulty: Mastery

Planet R has mass 2 units and Moon R orbits at distance 2 units. Planet S has mass 8 units and Moon S orbits at distance 4 units. The moons have equal mass. Using mass/distance², which planet pulls more strongly on its moon?

AThe pulls are equal

BPlanet R pulls four times more strongly

CPlanet S pulls two times more strongly

DNeither planet pulls on its moon

Solution & Explanation:Planet R gives 2/2² = 2/4 = 0.5. Planet S gives 8/4² = 8/16 = 0.5, so the modeled pulls are equal.

Problem 3Difficulty: Mastery

A student removes all mass from the central object in a computer model but leaves a moon moving nearby. What is the best prediction?

AThe moon will not orbit that object because the object provides no gravitational attraction

BThe moon will orbit faster because no mass means stronger gravity

CThe moon will be pushed away by gravity

DThe moon will become the central object's atmosphere

Solution & Explanation:Gravity requires mass. If the central object has no mass in the model, it cannot provide the inward gravitational pull needed for an orbit.

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Frequently Asked Questions

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QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Grade 8 Science students. It aligns with educational standard MS-ESS1-2 (Students compare models, data, and evidence showing that gravity is attractive and that stronger or weaker gravitational pulls help explain orbital motion.).