Across
- 3. a long, narrow groove that forms where water, lava, or other liquid flows
- 4. any planet with a solid surface, such as Earth or Mars
- 6. having the conditions necessary to support life
- 9. to notice how two or more things are alike or different
- 10. all the liquid water and solid water (ice) on a planet
- 12. an event or series of events that causes changes in the geosphere, such as flowing water or flowing lava
- 13. all living things on a planet
Down
- 1. a feature that forms on the surface of a planet, such as a mountain, channel, or sand dune
- 2. information about the natural world that is used to support or go against (refute) a claim
- 5. a scientist who studies the geospheres of planets in our solar system
- 7. the mixture of gases surrounding a planet
- 8. a claim supported by evidence
- 11. a set of interacting parts forming a complex whole
- 12. the solid part of a rocky planet