mars and earth crossworddd

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Across
  1. 1. it is mostly what temperature on mars?
  2. 5. 687 days on mars is a?
  3. 8. mars is known as what?
  4. 11. mars has no what that we need like here on earth to survive?
  5. 12. mars has a moon named P?
  6. 14. what is hard to grow on mars?
  7. 15. mars atmosphere is what?
Down
  1. 2. earth is about 4.54 years?
  2. 3. 24 hours and 37 minutes On mars is what?
  3. 4. what layer on earth do we stand on?
  4. 6. mars has a moon named D?
  5. 7. 4th planet from the sun?
  6. 9. mars has what gravity?
  7. 10. how many moons does mars have?
  8. 13. earth has what gravity?