Eccentricity, Gravity & Orbital Motion Quiz – Earth & Space Science (HS-ESS1-4)This quiz checks students’ understanding of how gravity, distance, mass, and orbital shape influence the motion of planets, comets, and stars. Students analyze diagrams, compare eccentricities, explain changes in gravitational force, and apply the inverse-square relationship to real orbital scenarios. Topics include: • How changing the distance between foci affects eccentricity • Comparing comet and planet orbits •