Ms Roos 7th Grade Science
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Created by:
willowgrove on September 7, 2011
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29 terms
Terms | Definitions |
|---|---|
 ecology | study of living things and their environments |
| environment | everything that surrounds an organism |
| interact | to act upon each other |
| community | all the populations that live in a certain place |
| ecosystem | living and nonliving things in an environment, together with their interactions |
| population | group of the same kind of organsim living in a certain place |
| habitat | place where and organism lives |
| niche | organism's role, or job, in its habitat |
| carrying capacity | largest amount of a population that can be supported by an area |
| limiting factors | conditions in the environment that put limits on where an organism can live |
| range | area where a type of animal or plant population is found |
| cycle | something that happens over and over in the same way |
| nitrogen-fixing bacteria | bacteria that can use nitrogen in soil to make nitrogen compounds |
| consumer | organism that obtains food by eating other organisms |
| decomposer | organism that breaks down the wastes or remains of other organisms |
| producer | organism that makes its own food |
| scavenger | animal that eats only dead organisms |
| energy pyramid | way of showing how energy moves through a food chain |
| food chain | way of showing the food relationships among a group of organisms |
| food web | way of showing how food chains are related |
| climax community | last community in a succession |
| succession | gradual change in organisms that occurs when the environment changes |
| biome | large region of the earth with particular plant and animal communities |
| climate | overall weather in an area over a long period of time |
| conservation | wise use of natural resources |
| natural resources | materials found in nature that are used by living things |
| renewable resources | natural resources that can be renewed or replaced |
| endangered species | kinds of living things that are in danger of dying out |
| pollution | release of harmful materials into the environment |
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