keyterms chapter 22

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keyterms chapter 22
2010-05-04 10:56:36
chapter 22

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  1. producer
    organism that makes its own food
  2. consumer
    organism that obtains energy by feeding on others
  3. herbivore
    consumers that only feed on plants
  4. carnivores
    consumers that only feed on animals
  5. omnivores
    consumer that feeds on both animals and plants
  6. scavenger
    carnivore that feeds on the bodies of dead organism
  7. decomposers
    break down wastes and dead organisms and return raw material to the ecosystem
  8. food chain
    a series of events in which a organism eats other and obtain energy
  9. food web
    many over laping food chain in an ecosystem
  10. energy pyramid
    shows the amount of energy that moves from one feeding level to another in a food web
  11. water cycle
    process by which water moves from earths atmosphere and back
  12. evaporation
    the process by which molecules of liquid water abosorb energy and change to gas
  13. condensation
    process by which gas changes into liquid
  14. precipitation
    rain, snow, sleet, or hail
  15. nitroge fixation
    the process by changing free nitrogen into a usable form of nitrogen