Geology on Mars

6. a scientist who studies the geospheres of planets in our solar system
7. information about the natural world that is used to support or go against (refute) a claim
8. a proposed answer to a question about the natural world
10. the process of making clear how your evidence supports your claim
11. the solid part of a rocky planet
14. the mixture of gases surrounding a planet
15. a set of interacting parts forming a complex whole
16. having the conditions necessary to support life
17. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see

1. all the liquid water and solid water (ice) on a planet
2. a claim supported by evidence
3. to notice how two or more things are alike or different
4. an event or series of events that causes changes in the geosphere, such as flowing water or flowing lava
5. a feature that forms on the surface of a planet, such as a mountain, channel, or sand dune
9. all the living things on a planet
12. any planet with a solid surface, such as Earth or Mars
13. a long, narrow groove that forms where water, lava, or other liquid flows