Environmental Ch. 3

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Across
  1. 3. the non living parts of an environment
  2. 7. All the ecosystems on Earth are powered by _______
  3. 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
  4. 9. Animals rely on _______ for food and oxygen
  5. 13. An example of a decomposer
  6. 15. An organism that actively hunts and feeds on another organism is called a(n) _______
Down
  1. 1. Trophic levels can be seen in all of the following except _____
  2. 2. A(n) ______ shows many connected feeding relationships in an ecosystem
  3. 4. the living parts of an environment
  4. 5. starts with a producer and ends with a consumer
  5. 6. The process of change in an environment over time is called ________
  6. 10. All animals are considered ________ because they must eat to obtain energy
  7. 11. _____ is not a way that prey defends itself against predators
  8. 12. the role an organism plays in an ecosystem
  9. 14. The study of how organisms interact with each other and their environment
  10. 15. The organism being hunted and fed upon is called the ______