Across
- 3. Source of life and heat in our Solar System
- 5. a feature that forms on the surface of a planet, such as a mountain, channel, or sand dune
- 8. planet: any planet with a solid surface, such as Earth or Mars
- 9. 3rd planet from the Sun, also known as "Terra"
- 11. 4th planet from the Sun, also known as "The Red Planet"
- 12. an event or series of events that causes changes in the geosphere, such as flowing water or flowing lava
- 14. having the conditions necessary to support life
Down
- 1. all the living things on a planet
- 2. a scientist who studies the geospheres of planets in our solar system
- 4. all the liquid water and solid water (ice) on a planet
- 6. the solid part of a rocky planet
- 7. a set of interacting parts forming a complex whole
- 10. the mixture of gases surrounding a planet
- 13. a long, narrow groove that forms where water, lava, or other liquid flows