Geology on Mars

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Across
  1. 4. all the living things on a planet
  2. 5. to notice how two or more things are alike or different
  3. 6. a long, narrow groove that forms where water, lava, or other liquid flows
  4. 7. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
  5. 9. a feature that forms on the surface of a planet, such as a mountain, channel, or sand dune
  6. 10. the process of making clear how your evidence supports your claim
  7. 11. information about the natural world that is used to support or go against (refute) a claim
  8. 12. the mixture of gasses surrounding a planet
Down
  1. 1. having the conditions necessary to support life
  2. 2. all the liquid water and solid water (ice) on a planet
  3. 3. a set of interacting parts forming a complex whole
  4. 5. a proposed answer to a question about the natural world
  5. 8. the solid part of a rocky planet