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any nonliving component of an environment


Pertaining to life; environmental factors created by living organisms


the struggle between organisms to survive in a habitat with limited resources


(ecology) the status of an organism within its environment and community (affecting its survival as a species)


the area in which something exists or lives


An organism that eats only plants


An organism that lives off another organism


an organism that makes its own food


the removal of trees

Global Warming

an increase in the average temperature of the earth's atmosphere (especially a sustained increase that causes climatic changes)

Ozone Shield

the layer of ozone gas in the upper atmosphere that protects Earth from some of the Sun's radiation


to put wastes, garbage, or the like, through a cycle of purification and conversion to useful products


an organism that makes its own food


any animal that feeds on flesh


organism that relies on other organisms for its energy and food supply; also called a heterotroph

Ecological Succession

(ecology) the gradual and orderly process of change in an ecosystem brought about by the progressive replacement of one community by another until a stable climax is established

Food Chain

a series of steps in which organisms transfer energy by eating and being eaten


an organism that cannot make its own food


the people who inhabit a territory or state


any animal that feeds on refuse and other decaying organic matter

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