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7th Topic 9 Lesson 2
Term | Definition |
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producer | an organism that can make its own food |
consumer | an organism that obtains energy by feeding on other organisms |
decomposer | an organism that gets its energy by breaking down biotic wastes and dead organisms and returns raw materials to the soil and water |
food chain | a series of events in an ecosystem in which organisms transfer energy by eating and by being eaten |
food web | the pattern of overlapping feeding relationships or food chains among the various organisms in an ecosystem |
energy pyramid | a diagram that shows the amount of energy that moves from one feeding level to another in the food web |
role | a function played by a person or thing in a particular situation |