mars and earth crossword

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Across
  1. 4. the outermost layer of the earth
  2. 6. what's the nickname for mars?
  3. 7. how many main layers does the earth have?
  4. 11. what's the deepest layer of the earth?
  5. 13. what is the mantle mostly made of?
  6. 14. what layer is after the inner core?
  7. 15. what does Mars have two of?
Down
  1. 1. outside of the upper and bottom mantle?
  2. 2. what is the layer beneath the earths crust?
  3. 3. what is the oceanic crust made of?
  4. 5. can you live on earth
  5. 8. how many moons does the earth have?
  6. 9. are mars´ moons inactive or active?
  7. 10. can you live on mars?
  8. 12. What type of planet is mars?