1. Draw/insert pic of a basic diagram to the right of the phosphorus cycle. 2. Why is phosphorus important? 3. How does it "enter" and "exit" parts of the system? 4: What can it do to an ecosystem if there is an overabundance? What if there is a deficiency? 5. How do humans affect the phosphorus cycle? 6. What is one major difference between this cycle and all of the others? 7. Draw/insert pic of a basic diagram of the carbon eycle. 8 Why is carbon important? 9. How does carbon "enter" and "exit" parts of an ecosystem? 10. How do humans affect the carbon cycle? 11. What are problems that can come about due to too much carbon in a system? 17. Draw/insert a pic of a basic diagram of the nitrogen cycle. 18. Why do all organisms need nitrogen? 19. What % of the atmosphere is made up of nitrogen? 20. Since most organisms can't use this nitrogen directly, explain the 2 ways nitrogen gets into the system in a usable form. 21. What are problems that can arise from too much nitrogen? 22. How does nitrogen return to the atmosphere? 23. Be sure to look at the hydrologic cycle and know the basics of it! 24. Insert a picture/pictures of your "master" cycle in the space below before turning this in on Canvas.