Across
- 2. every organism on earth needs this liquid to survive
- 5. The first layer of the earth
- 7. Makes up 71% of earth
- 11. CO2 and other types of human waste that destroy the earth
- 12. The third layer of earth
- 13. The second layer of the earth
- 14. The fourth layer of earth
- 15. We breath this in
Down
- 1. Another word for natural
- 3. to protect or save
- 4. One of the layers of our atmosphere
- 6. Third planet from the sun
- 8. There are seven of these landmasses on earth
- 9. The opposite of artificial
- 10. A florist sells these