Geology on Mars

1234567891011121314151617
Across
  1. 2. The number of rocky planets in are solar system
  2. 4. any planet with a rocky surface
  3. 6. The star in the middle of our solar system
  4. 10. studies rocks on other planets
  5. 13. planet that supports life
  6. 14. closest planet to the Sun
  7. 15. the only habitable planet
  8. 17. considered to be Earth's sister planet
Down
  1. 1. an event or series of events that causes change to the surface of a planet
  2. 3. Initials for National Aeronatics and Space Administration
  3. 5. a feature that forms on the surface of a planet
  4. 7. all the living things on a planet
  5. 8. necessary for human survival
  6. 9. mixture of gases surrounding a planet
  7. 11. Our solor system is located in the
  8. 12. The red planet
  9. 16. all the liquid water on a planet