Solar System Review

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Across
  1. 3. the only planet inhabited by robots
  2. 6. this planet appears to spin on its side and is very cold and windy
  3. 7. A group of millions or billions of stars.
  4. 8. the hottest planet in the solar system
  5. 10. A model of the solar system in which the Earth is at the center.
  6. 11. the largest planet in the solar system
  7. 12. the only planet inhabited by life
  8. 13. The motion of one object around another because of gravity.
  9. 15. A planet made up mostly of gases like hydrogen and helium.
  10. 16. A planet made up mostly of icy materials.
  11. 17. how much matter is in an object
  12. 19. the sixth planet from the Sun surrounded by rings of ice and rock
  13. 21. An attractive force between any two objects that have mass.
  14. 23. The Sun and all the objects that orbit around it.
  15. 24. A model of the solar system in which the Sun is at the center.
Down
  1. 1. a galaxy in which the solar system is located
  2. 2. Any object that orbits a planet or star.
  3. 4. the gravitational force exerted between the Earth and another object
  4. 5. A large space rock that orbits the Sun.
  5. 9. A planet made up of mostly rock and metal.
  6. 14. the first planet located by using math and the farthest away from the Sun
  7. 18. A ball of gas that releases light and heat.
  8. 20. located between Mars and Jupiter
  9. 22. the smallest planet in the solar system