2A- Celayna Rivera

5. where organisms use oxygen to generate energy from nutrients and produce carbon as waste.
6. the process of burning something.
9. this is a bacteria that lives in the roots of certain plants.
10. what determines the type of precipitation.
12. rain, sleet, snow, hail, or freezing rain are all forms of _______.
15. largest storage reservoir of carbon on earth.
18. where water vapor is changed back into liquid water.
19. the water on earth is relatively _________.
21. is condensation near the ground.
22. how nitrogen enters the atmosphere.

1. the process which water is converted from it's liquid state to the gaseous state.
2. a purifying process
3. how carbon is removed from the atmosphere.
4. all parts of the ecosystem need an adequate supply of ______.
6. this is required for precipitation.
7. bacteria transforms soil ammonia into nitrates.
8. nitrogen is very ________ with other elements.
11. when water flows along the surface into lakes, rivers, and streams.
13. acts as a part of the earth's thermostat.
14. another word for water cycle.
16. makes up 78% of the earth's atmosphere.
17. how do animals get nitrogen.
20. where liquid fresh water is stored underground.