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keyterms chapter 22
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producer
organism that makes its own food
consumer
organism that obtains energy by feeding on others
herbivore
consumers that only feed on plants
carnivores
consumers that only feed on animals
omnivores
consumer that feeds on both animals and plants
scavenger
carnivore that feeds on the bodies of dead organism
decomposers
break down wastes and dead organisms and return raw material to the ecosystem
food chain
a series of events in which a organism eats other and obtain energy
food web
many over laping food chain in an ecosystem
energy pyramid
shows the amount of energy that moves from one feeding level to another in a food web
water cycle
process by which water moves from earths atmosphere and back
evaporation
the process by which molecules of liquid water abosorb energy and change to gas
condensation
process by which gas changes into liquid
precipitation
rain, snow, sleet, or hail
nitroge fixation
the process by changing free nitrogen into a usable form of nitrogen
Author
renesimon
ID
17734
Card Set
keyterms chapter 22
Description
science
Updated
2010-05-04T14:56:36Z
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