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| part of the Earth that supports life, including the top portion of Earth's crust, atmoshphere and all the water on the Earth's surface |
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| all the living organisms that live in an area and the nonliving features of their environment |
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| the study of interactions that take place among organisms and their environment |
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| all the organisms that belong to the same species living in a community |
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| all the populations of different species that live in an ecosystem |
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| place where an organism lives and that provides the types of food, shelter, moisture, and temperature needed for survival |
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| anything that can restrict the size of a population, including living and nonliving features of an ecosystem, such as predators or drought |
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| largest number of individuals of a particular species that an ecosystem can support over time |
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| organism, such as a green plant or alga, that uses an outside source of energy like the Sun to create energy-rich food molecules |
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| organism that cannot create energy-rich molecules but obtains its food by eating other organsims |
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| any close relationship between species, including mutualism, commensalism, and prasitism |
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| a type of symbiotic relationship in which both organisms benefit |
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| a type of symbiotic relationship in which one organism benefits and the other organism is not affected |
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| a type of symbiotic relationship in which one organism benefits and the other organism is harmed |
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| in an ecosystem, refers to the unique ways an organism survives, obtains food and shelter, and avoids danger |
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