Geology on Mars/Venus

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Across
  1. 4. the national aeronautical space administration
  2. 6. The first rover sent to Venus
  3. 9. The color of Venus
  4. 11. Saturn, Jupiter, Uranus,
  5. 13. The rock that mostly composes Mars
  6. 14. the third planet from the sun
  7. 16. The innermost layer of Mars
  8. 17. The color of Mars from space
  9. 19. The amount of days in a year on Mars
Down
  1. 1. the amount of days in a year on Venus
  2. 2. The most recent rover sent to Mars
  3. 3. the area around a star in which an organism can live in
  4. 5. The farthest planet to the sun where scientists look for life
  5. 7. are referred to as the ______ planets
  6. 8. the molecule that scienists use to look for life (can only be produced by a living thing)
  7. 10. Caused by the fall of a meteorite
  8. 12. The first rover sent to Mars
  9. 15. The planet closest to the sun where scientists look for life
  10. 17. The machine scientists send to planets to explore for them
  11. 18. Describes Mars' atmosphere
  12. 20. Mars, Earth, Mercury, and Venus are referred to as the _____ planets