Geology on Mars

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Across
  1. 3. A landform made by sediment deposited by a river.
  2. 4. Loose dust and rocky material covering Mars.
  3. 7. Mars’s massive canyon system.
  4. 8. The ability of an environment to support life.
  5. 9. The science of studying a planet’s rocks and surface.
  6. 12. A dent in a planet caused by an impact.
  7. 13. The blanket of gases around a planet.
  8. 14. The iron compound responsible for Mars’s red color.
  9. 16. The breaking down of rocks into smaller pieces.
  10. 17. A natural solid with a specific chemical structure.
  11. 20. A planet’s hard outer layer.
  12. 21. A large Martian area known for its giant volcanoes.
Down
  1. 1. Frozen areas near Mars’s north and south poles.
  2. 2. The story of how a planet has changed over time.
  3. 5. A groove carved by flowing water.
  4. 6. Rock made from layers of compacted or cemented material.
  5. 10. A natural surface feature, such as a mountain or valley
  6. 11. Tiny pieces of rock and other material.
  7. 15. Mars’s enormous volcano, the largest known in the solar system.
  8. 18. A robotic vehicle that explores Mars.
  9. 19. The movement of rock and soil from one place to another.