Trip to Mars

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Across
  1. 3. nauseous
  2. 5. not enough
  3. 9. easily broken
  4. 10. able to maintain
  5. 11. dizzy
  6. 12. keeping clean
Down
  1. 1. large in size
  2. 2. find one's way around
  3. 4. protection
  4. 6. related to earth
  5. 7. people who work closely together
  6. 8. hard to hear