Across
- 3. a long, narrow groove that forms where water, lava, or other liquid flows
- 5. a feature that forms on the surface of a planet, such as a mountain, channel, or sand dune
- 7. any planet with a solid surface, such as Earth or Mars
- 8. an event or series of events that causes changes in the geosphere, such as flowing water or flowing lava
- 10. the mixture of gasses surrounding a planet
- 11. the solid part of a rocky planet
Down
- 1. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
- 2. having the conditions necessary to support life
- 4. all the liquid water and solid water (ice) on a planet
- 6. all the living things on a planet
- 9. a set of interacting parts forming a complex whole