Geology on Mars

2. a long, narrow groove that forms where water, lava, or other liquid flows
4. the solid part of a rocky planet
6. having the conditions necessary to support life
7. a proposed answer to a question about the natural world
12. a scientist who studies the geospheres of planets in our solar system
13. planet any planet with a solid surface, such as Earth or Mars
14. the mixture of gases surrounding a planet
16. an event or series of events that causes changes in the geosphere, such as flowing water or flowing lava

1. the process of making clear how your evidence supports your claim
2. to notice how two or more things are alike or different
3. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
5. a claim supported by evidence
8. information about the natural world that is used to support or go against (refute) a claim
9. a feature that forms on the surface of a planet, such as a mountain, channel, or sand dune
10. a set of interacting parts forming a complex whole
11. all the liquid water and solid water (ice) on a planet
15. all the living things on a planet