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Chapter 2

Ecosystems & Biomes

producer an organism that makes its own food
consumer an organism that obtains energy by feeding on other organisms
herbivore consumers that eat only plants
carnivore consumers that eat only animals
omnivore consumers that eat both plants and animals
scavenger a carnivore that feeds on the dead bodies of organisms
decomposers they break down waste and dead organisms and return the raw materials to the ecosystem
food chain a series of events in which one organism eats another and obtains energy
food web it consists of many overlapping food chains in an ecosystem
energy pyramid shows the amount of of energy that moves from one feeding level to another in a food web
water cycle the continuous process by which water moves from the earths surface to the atmosphere and back
evaporation the process by which molecules of liquid water absorb energy and change to gas
condensation the process by which a gas changes to a liquid
precipitation as more water vapor condenses, the drops of water in the cloud grow larger
nitrogen fixation the process of changing free nitrogen into a usable form of nitrogen
Created by: aewing