Chapter 18 Study Guide
1. What is Interdependence? Please provide an example?
2. What is an ecological model?
3. What is a Biosphere?
4. What is an ecosystem?
5. What is a community?
6. What is a population?
7. What are Fossil Fuels made of?
8. How are Fossil Fuels made?
9. Please provide some examples of common Fossil Fuels?
10. How are Ecological models useful?
11. What is the Carbon Cycle (Explain step by step)?
12. How do humans affect the Carbon Cycle?
13. What is the Nitrogen Cycle (Explain step by step)?
14. What do plants use nitrates and nitrites for?
15. Why is Nitrogen so important?
16. Organisms that manufacture organic nutrients for an ecosystem are called?
17. What is the Water Cycle (Explain step by step)?
18. What are the differences between a FOOD WEB and a FOOD CHAIN? What are their similarities?
19. What is the specific physical location in which a given species lives?
20. What is Organic material in an ecosystem called?
21. What are the limiting factors of trophic levels?
22. What is a niche?
23. What do the Carbon cycle, nitrogen cycle and water cycle have in common?
24. Water and minerals needed by all organisms on Earth pass back and forth between the biotic and abiotic portions of the environment in processes called?
25. What happens to the Nitrogen in an organism’s body when it dies?
26. On the food web above and to the left which type of organism receives energy from EVERY OTHER type of organism?
27. In going from one trophic level to the next higher level what happens to the amount of useable energy?
28. On the food web, which organism is at the highest trophic level?
29. How much energy is transferred from one trophic level to the next?
30. Imagine a grassland ecosystem what would the primary producers most likely be?