Across
- 2. a feature that forms on the surface of a planet, such as a mountain, channel, or sand dune
- 5. a proposed answer to a question about the natural world
- 7. all the liquid water and solid water (ice) on a planet
- 8. having the conditions necessary to support life
- 9. the solid part of a rocky planet
- 10. information about the natural world that is used to support or go against (refute) a claim
Down
- 1. an object, diagram, or computer program that helps us understand something
- 3. the mixture of gases surrounding a planet
- 4. all the living things on a planet
- 6. a long, narrow groove that forms where water, lava, or other liquid flows