Science Crossword

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Across
  1. 4. the sixth planet
  2. 7. the eighth planet
  3. 9. the second planet
  4. 11. the seventh planet
  5. 12. the third planet
  6. 13. earth's natural satellite
  7. 14. all the planets and the sun
Down
  1. 1. when something spins in place
  2. 2. a dirty snowball
  3. 3. the fifth planet
  4. 5. a large space rock
  5. 6. a vaporized comet or asteroid
  6. 8. a dwarf planet
  7. 10. what the planets revolve around
  8. 13. the fourth planet
  9. 15. when something spins around something else
  10. 16. the first planet