geology on mars

2. to notice how two or more things are alike or different
6. the solid part of a rocky planet
9. they said of interacting parts forming a complex hole
10. a long narrow Groove that forms where water lava or other liquids flow
12. a proposed answer to a question about the natural world
15. having the conditions necessary to support life
16. an object diagram or computer that helps us understand something by making it simpler or easier to see

1. all the liquid water and solid water on a planet
3. information about the natural world that is used to support or go against a claim
4. process of making clear how your evidence support your claim
5. argument a claim supported by evidence
7. the mixture of gases surrounding a planet
8. geologists a scientist who studies the geosphere of planets in our solar system
11. all the living things on a planet
13. a feature that forms on the surface of a planet such as a mountain Channel or sand dune
14. process an event or series of events that causes changes in the geosphere such as flowing water or flowing lava