Across
- 3. a rocky planet
- 7. A feature that forms on the surface of the planet, such as a Mountain,channel or dune.
- 8. An event that causes changes in the geospphere, such as flowing water or flowing lava
- 10. all the water on Earth
- 11. al living things on Earth
- 13. the variable in an experiment that the experimenter changes
- 14. A set of interacting parts forming a whole
Down
- 1. Stands for National Aeronautics and Space Agency
- 2. Having the conditions necessary to support life
- 4. all the gases that surrounds Earth
- 5. A long, narrow groove that forms where water, lava or other liquid flows
- 6. any planet with a solid surface
- 9. all the solid surface on Earth
- 12. the planet that we live on