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2
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Organism in a food chain that represents a feeding step in the passage of energy and materials through an ecosystem
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4
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Factors Living things in an ecosystem
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5
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Non living things in an ecosystem
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7
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Organisms that take in food material and are above producers on the energy pyramid
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8
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A close relationship; both species benefit
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9
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The organic circulation of carbon from the atmosphere into organisms and back again
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10
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All the living and non-living things that interect in an area.
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11
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The relation between two different species of organisms that are interdependent
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12
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A group of organisms of the same species populating a given area
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14
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The cycle in which nitrogen gas is changed into forms of nitrogen that plants can use
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15
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Shows how food chains are related within an ecosystem
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