Biogeochemical Cycles
1. What are biogeochemical
cycles?
2. What is the respective
importance of water, carbon
and nitrogen for living beings?
3. What is the water cycle?
4. Why is the sun the “motor”
of the water cycle?
5. What is the carbon cycle?
6. What is the main biological
process that consumes carbon
dioxide?
7. How is carbon dioxide made
by producers and consumers?
8. What are fossil fuels?
9. What is the most abundant
form under which nitrogen is
found in nature?
10. Under which form is
nitrogen fixed by living
beings?
11. What is the nitrogen
cycle?
12. Why is a leguminous crop
rotation used in agriculture?