B12 organisms and their environment

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11 Terms

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principal source of energy

the sun

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food chain

showing the transfer of energy

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food web

network of interconnected food chains

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producers

makes its nutrients from sunlight

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consumers

gets its energy by feeding on others

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Herbivore

gets its energy by feeding on plants

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carnivore

gets its energy by feeding on other animals

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decomposer

gets energy from dead or waste organic matter

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Ecosystem

a unit containing all of the organisms and their environment

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trophic level

position of an organism in a food chain

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Why do food chains have less then 5 levels

energy loss - more levels = less energy at the topo