Across
- 1. a set of interacting parts forming a complex whole
- 3. an event or series of events that causes changes in the geosphere, such as flowing water or flowing lava
- 5. having the conditions necessary to support life
- 9. all the liquid water and solid water (ice) on a planet
- 10. a long, narrow groove that forms where water, lava, or other liquid flows
Down
- 2. a claim supported by evidence
- 4. a feature that forms on the surface of a planet, such as a mountain, channel, or sand dune
- 6. the mixture of gases surrounding a planet
- 7. all the living things on a planet
- 8. the solid part of a rocky planet