Across
- 2. a structure made out of the geosphere
- 5. all the water on a planet
- 9. all the gas on a planet
- 10. having what is needed to support life
- 11. planets Mercury, Venus, Earth, and Mars are
- 13. what the channel on Mars was made by
- 14. planet closets to the Sun
Down
- 1. the landform we studied on Mars
- 3. the other habitable planet
- 4. planet farthest from the Sun (not Pluto)
- 6. planet we live on
- 7. all the living things on a planet
- 8. all the rock on a planet
- 12. acronym to support a claim in science