Chapter 20 - Organism and Their Environment

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Across
  1. 4. primary consumer
  2. 7. a community of organisms interacting with one another and with its non-living environment
  3. 8. total energy at the last tropic level
  4. 9. an animal that is eaten by another animal
  5. 12. when organism move out of the area
  6. 13. average amount of energy lost when it is transferred from one tropic level to the next
  7. 14. an animal that feeds on another animal
  8. 15. dead bodies of organism buried in the earth for million of years
  9. 16. removal of carbondioxide from the environment
  10. 17. secondary consumer
Down
  1. 1. total energy at the first tropic level
  2. 2. the position of an organism in a food chain, food web or ecological pyramid
  3. 3. release carbondioxide into the environment
  4. 5. process removing of nitrogen from the soil
  5. 6. ammonium compound converted to nitrate
  6. 10. rapid increase in population
  7. 11. when organisms of the same species move into the the area