Carbon/Nitrogen/Oxygen Cycles Quiz STUDY GUIDE Kingspoint Christian School Life Science

The following questions cover topics that will be on the Carbon/Nitrogen/Oxygen Cycles quiz. Use these questions as a guide for studying for the quiz. 1. Plants consume most of their carbon from where/what? 2. When a human or animal consumes food, the carbon in that food is most likely to be converted into what

elements? 3. What organisms absorb carbon dioxide (CO2)? 4. When a log is burned in a fire it seems like it loses weight; what happens to its physical mass? 5. Where does a tree primarily obtain its physical mass when it is growing? 6. Describe the carbon cycle. 7. How do decomposers affect the carbon cycle? 8. How do photosynthesizing plants affect the carbon cycle? 9. Draw a diagram of the carbon cycle and explain what is happening at each major step? 10. Why is nitrogen essential to life? 11. Where do plants get nitrogen from? 12. What are Nitrogen-fixing bacteria and why are they important? 13. What sort of problems can excess nitrates cause in water systems? 14. Where is the largest store of oxygen on Earth? 15. What are the products and reactants in the photosynthesis process.

16. What are the products and reactants in the burning of fossil fuels? 17. Where is the largest store of carbon on earth? 18. What is the main driving force/factor in the nitrogen cycle? 19. Describe Ozone and how it is formed, and why it is important. 20. Why is nitrogen important to life? 21. Why is bacteria important to the nitrogen cycle? 22. What is the approximate composition of Earth’s atmosphere?