The Martian Crossword

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Across
  1. 4. 1 day on Mars
  2. 6. single-celled organisms found in soil
  3. 8. approximately 39 inches
  4. 9. seeds sprout into plants
  5. 10. National Aeronautics and Space Administration
  6. 12. scientist who studies plants
  7. 14. Greek god of messengers
  8. 15. extra-vehicular activity
Down
  1. 1. 80% of Earth's atmosphere
  2. 2. H20
  3. 3. approximately 0.6 miles
  4. 5. gas necessary for life
  5. 7. Mars Ascent Vehicle
  6. 8. 4th planet from the Sun
  7. 11. gas layer that surrounds a planet
  8. 13. Greek god of war