Across
- 5. nitrogen gas is turned into this
- 7. a part of the water cycle
- 8. not CO2
- 9. an area where water is drained away from
- 10. a mixture of dead organic material that can be used as fertilizer
Down
- 1. see oh too
- 2. water in the ground
- 3. not the water cycle, but CO2 cycle
- 4. a cycle that includes water
- 6. the picture on page 186 and 187 is a _____