1. Biogeochemical Cycles
Carbon, Phosphorus, Nitrogen, Hydrologic, and Oxygen

2. The Carbon Cycle

3. Carbon Cycle Description

4. Description cont.

5. Description cont.

6. The Phosphorus Cycle

7. The Nitrogen Cycle

10. The Hydrologic Cycle

11. Description cont.

12. The Oxygen Cycle
Look in your biology book on p The picture is in the bottom right side of the page. The description is just to the left of the picture.
You will have to use the internet to determine three human impacts on the cycle, if you don’t already know.