Across
- 1. All of the gasses surrounding Earth
- 3. Plates under the earth that can cause earthquakes
- 4. Water flowing down land's surface
- 10. Process where carbon is used in the environment and by organisms
- 11. System where matter can go in and out of
- 12. Process where nitrogen is converted through fixation and decomposition
- 14. The type of system that Earth is
- 17. Solid innermost layer of Earth's interior
- 18. All of the landmass that makes up Earth
- 19. Part of earth where all life exists
Down
- 2. All of the water on Earth's surface
- 5. Large aquifer in the Midwest
- 6. Allows a planet to maintain an atmosphere
- 7. Other name for the water cycle
- 8. Gas layer that protects us from UV rays
- 9. Outermost layer of Earth where all life is
- 13. Liquid layer surrounding the inner core
- 15. Layer that consists of the crust and part of the mantle
- 16. Solid layer of Earth's interior
- 20. Ancient landmass of every continent combined