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Savvas Topic 5-Dupli
Ecosystems
Term | Definition |
---|---|
organism | A living thing. |
biotic factor | A living or once living part of an organism's habitat. |
abiotic factor | A nonliving part of an organism's habitat. |
ecosystem | The community of organisms that live in a particular area, along with their nonliving environment. |
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 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 a food web. |