Across
- 4. nature recycles matter through
- 6. the Earth is mostly made of
- 7. carbon moves from plants to animals.
- 9. all living organisms on Earth
- 10. water on Earth is
- 14. water stored under the Earth
- 15. where most of the nitrogen on Earth is
- 17. carbon moves from living things to the atmosphere air that surrounds the Earth
- 18. all water on the Earth
- 19. makes up 78% of the atmosphere
Down
- 1. process where water moves above,on, and b
- 2. causes cloud formation
- 3. carbon moves from the air to the plants
- 5. used to fuel cars, power plants, and factories
- 8. bacteria that lives in the roots ofplants
- 11. a form used by plants
- 12. rocks, minerals and the ground
- 13. has always been on the Earth
- 16. a purifying process