Martian Metropolis

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Across
  1. 2. a Martian day
  2. 4. a specific diet of plant-based foods
  3. 5. place to grow plants
  4. 6. skill and job needed on Mars
  5. 7. grammar expectation for an abbreviation
  6. 10. how people on earth protect their skin from damaging rays
  7. 13. waters of the earth's surface
  8. 14. force or weight on a planet
  9. 17. structure which organizes ideas and information
  10. 18. to repurpose and reuse, especially on Mars
  11. 19. layer of the surface of the earth
Down
  1. 1. a group of people creating a new environment
  2. 3. internal heat of the earth
  3. 8. the vapors and gasses surrounding earth
  4. 9. reddish coating formed over iron over a period of time
  5. 11. dangerous energy of high energy particles
  6. 12. half of the earth
  7. 15. the Red Planet
  8. 16. element or feature of informational text