Ecosystem and Biological Terms

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abiotic matter

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matter that makes up the nonliving parts of an ecosystem, such as air, water, and rocks

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atoms

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the tiny pieces that all matter—all the stuff in the world—is made of

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biotic matter

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matter that makes up the living and dead organisms in an ecosystem

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carbon

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a type of atom (a tiny piece) that makes up molecules such as carbon dioxide and energy storage molecules

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carbon dioxide

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a molecule made of carbon and oxygen atoms

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cellular respiration

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the chemical reaction between oxygen and glucose that releases energy into cells

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chloroplast

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the part of a cell where photosynthesis happens

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consumer

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an organism that needs to eat in order to get energy storage molecules (such as starch and fat)

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decomposer

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an organism that gets energy storage molecules (such as glucose) by breaking down dead matter

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ecosystem

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all the living and nonliving things interacting in a particular area