Competition - the struggle among organisms for the same limited resources, Food Chain - a series of steps by which energy moves from one type of thing to another, Producer - an organism that makes its own food for energy, Pollution - any substance that damages the environment, Food Web - a diagram that combines many food chains into one picture, Consumer - an organism that cannot make its own food, Conservation - an attempt to preserve or protect an environment from harmful changes, Environment - all of the conditions surrounding an organism, Decomposer - an organism that gets its energy by breaking down wastes and dead organisms,

Science Chapter 3: Ecosystems

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