Planets and Gravity

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Across
  1. 6. Mercury, Venus, Earth and Mars
  2. 9. the inner planet furthest from the sun
  3. 10. A synonym for how big or how much space something takes up. Is not related to gravity
  4. 11. Studied the solar system
  5. 13. the planet that is the furthest out
  6. 14. system a sun or star and the planets around it.
  7. 17. the largest planet
  8. 18. when a planet spins on its axis, responsible for day and night
Down
  1. 1. a nearly circular oval
  2. 2. Jupiter, Saturn, Uranus and Neptune
  3. 3. the imaginary line that passes through the center of the planet
  4. 4. Means to get bigger or further
  5. 5. when ____ gets bigger or increases, the gravity also gets bigger
  6. 7. a property of matter that pulls things together
  7. 8. when distance increases the gravity will
  8. 12. Planet closest to the sun
  9. 15. when one object travels around another object
  10. 16. the label or unit for gravity