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| A group of various species that live in the same place and interact with one another. |
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| Includes a community of organisms and their physical environment. |
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| A place where organisms live |
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| A variety of organisms in a a given area. |
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| the replacement of one community to another over a time period. |
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| Average weather conditions over a long period of time. |
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| A large region characterized by a specific kind of climate. |
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| Each step in the transfer of energy. |
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| A triangular diagram that shows an ecosystem’s loss of energy, which results as energy passes through the ecosystem’s food chain |
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| the continuous movement of carbon from the nonliving environment into living things and back. |
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| The process of exchanging oxygen and CO2 between organisms and their surroundings |
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| the process in which nitrogen circulates among the air, soil, water, and organisms in an ecosystem. |
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| the movement of phosphorus in different chemical forms from the surroundings to organisms and then back to the surroundings. |
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