34Geology On Mars

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Across
  1. 2. a feature that forms on the surface of a planet, such as a mountain, channel, or sand dune
  2. 4. a proposed answer to a question about the natural world
  3. 6. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
  4. 8. an even or series of events that causes changes to the geosphere, such as flowing water or lava
  5. 9. any planet with a solid surface, such as Earth or Mars
  6. 11. information about the natural world that is used to support or refute a claim
  7. 12. all the living things on a planet
  8. 13. the mixture of gases surrounding a planet
  9. 16. all of the liquid water and ice on a planet
  10. 17. a scientist who studies the geospheres of planets in our solar system
Down
  1. 1. a claim supported by evidence and reasoning
  2. 3. having the conditions necessary to support life
  3. 5. the solid rocky part of a planet
  4. 7. a set of interacting parts forming a complex whole
  5. 10. to notice how two things are alike or different
  6. 14. a long, narrow groove that forms where water, lava, or other liquid flows
  7. 15. the process of making clear how your evidence supports your claim