Environmental Ch. 3

3. the non living parts of an environment
7. All the ecosystems on Earth are powered by _______
8. When populations of prey go up, so does the population of predators. When populations of prey go down, the population or predators also goes down. This is the _______ cycle
9. Animals rely on _______ for food and oxygen
13. An example of a decomposer
15. An organism that actively hunts and feeds on another organism is called a(n) _______

1. Trophic levels can be seen in all of the following except _____
2. A(n) ______ shows many connected feeding relationships in an ecosystem
4. the living parts of an environment
5. starts with a producer and ends with a consumer
6. The process of change in an environment over time is called ________
10. All animals are considered ________ because they must eat to obtain energy
11. _____ is not a way that prey defends itself against predators
12. the role an organism plays in an ecosystem
14. The study of how organisms interact with each other and their environment
15. The organism being hunted and fed upon is called the ______