Earth and Mars

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Across
  1. 4. Earth has a _________ field that protects us from solar radiation
  2. 6. Mars is covered in ______ giving it a red appearance
  3. 8. Colorful light displays caused by solar wind reacting with Earth's magnetic field
  4. 11. Mars has the largest ________ in the solar system
  5. 12. Earth is the largest of the __________ planets
  6. 13. Martian days are called _________
  7. 17. On top of the inner core sits the ___________
Down
  1. 1. Mars is about _____ the size of Earth
  2. 2. The layer of Earth in the very center is called the ________ core
  3. 3. Earth's crust moves about the same rate as your __________ grow
  4. 5. The outermost layer of Earth is called the ________
  5. 7. Earth is the only planet that we know of that can sustain ________
  6. 9. Earth is the only planet not named after __________
  7. 10. The word "Earth" comes from the germanic word for ________
  8. 14. Outside of the inner core is the __________ core
  9. 15. Earth is the only planet that has _________ on its surface
  10. 16. Mars is named after the Roman god of _____