mars and earth crossword puzzle

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Across
  1. 6. what is a robotic spacecraft that leaves Earth orbit and explores space.
  2. 7. mars has 2 ____
  3. 8. how far is mars from the sun?(in killometers)
  4. 12. what is mars half the size of?
  5. 14. mars is knon as the red planet because?
  6. 15. how many earth days are in a year on earth?
Down
  1. 1. in order to live on mars we need to _________
  2. 2. true or false? mars is a gas planet
  3. 3. mars is known as wha
  4. 4. what happens once every 26 months?
  5. 5. what type of planet is mars NOT?
  6. 9. how long does mars's axis rotation take?
  7. 10. mars is named after the god of ___
  8. 11. how many earth days are in a year on mars?
  9. 13. what is the fourth planet from the sun?