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1
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The role of a species in its community
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2
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The place in which an organism lives
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3
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Prevents harmful ultraviolet radiation from reaching Earth's surface
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4
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Groups of populations that interact with each other in the same area
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5
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Any practice that reduces, eliminates, or prevents pollution at its source
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6
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An area that, due to geography, weather patterns, and climate, shares the same air
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7
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The region draining into a river, river system, or other body of water
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12
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The part of the Earth that contains and supports living things
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14
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'living together' a mutually beneficial relationship
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15
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The relationships between the living community and the nonliving factors that affect it
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17
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Electricity produced through a chemical reaction usually Hydrogen and Oxygen
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