Across
- 1. Smallest organism on a habitable planet
- 7. Needed to support a claim
- 8. Main CCC in Mars Unit
- 10. Name for the gas giant planets
- 11. One type of landform
- 14. One way to form a channel
- 15. All water on Earth
- 17. One type of landform
- 18. Breaking down of rock
- 19. Dropping off of sediment
- 20. Main SEP in Mars Unit
- 21. One type of landform
Down
- 2. landform on both Mars and Earth
- 3. Closest terrestrial planet to the sun
- 4. Type of rock formed by moving water
- 5. Living part of the Earth system
- 6. All land on Earth
- 9. One way to form a channel
- 10. Closest Jovian planet to the sun
- 12. Gases surrounding the Earth
- 13. One type of landform
- 15. Able to support life
- 16. Moving of sediment by moving liquids