| A | B |
|---|
| ecosystem | all the living and nonliving things in a particular area that interact |
| biotic factors | the organisms in an ecosystem |
| abiotic factors | the nonliving things in an ecosystem |
| habitat | a specific environment that provides the things an organism needs to survive |
| species | a group of similar organisms that can mate and produce fertile offspring |
| niche | the role an organism has in the ecosystem in which it lives |
| producer | an organism that can make its own food |
| consumer | an organism that obtains energy by feeding on other organisms |
| herbivores | consumers that eat only plants |
| carnivores | consumers that eat only animals |
| ominvores | consumers that eat both plants and animals |
| scavenger | a carnivore that feeds on the bodies of dead organisms |
| decomposer | an organism that breaks down wastes and dead organisms |
| food chain | a series of events in which one organism eats another and obtains energy |
| food web | many overlapping food chains in a ecosystem showing energy flow |
| energy pyramid | a diagram that sows the amount of energy that moves between levels in a food web |
