Space Review 6.2abcd

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Across
  1. 1. This is at the center of our solar system.
  2. 4. Large chunks of rock left over from the formation of the planets.
  3. 6. Where does the source of gravity come from that holds the moon in place and causes it to keep revolving around the Earth?
  4. 11. The _________ planets have rocky surfaces.
  5. 13. The name of the first man to walk on the moon.
  6. 16. The _____ belt is located between Mars and Jupiter.
  7. 17. The planet that is farthest from our sun in our solar system.
Down
  1. 1. The name of the first artificial satellite sent into orbit around the Earth.
  2. 2. The first human to go into space.
  3. 3. The Red Planet
  4. 5. When an astronaut goes to the moon, the astronaut's _____ changes.
  5. 7. Means the sun is the center of the solar system.
  6. 8. ________ keeps the Earth in orbit around the sun.
  7. 9. A natural or artificial object that revolves around the Earth.
  8. 10. The planet that has the great red spot.
  9. 12. What two factors keep the planets in orbit? _____ and gravity
  10. 14. The ______ ______ have deep, gaseous atmospheres.
  11. 15. Means the Earth is the center of the solar system