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unit 11
ecosystems/food chains
| Term | Definition |
|---|---|
| environment | all the living and the nonliving things that surround and affect an organism |
| ecosystem | a community of organisms and the environment in which they live |
| population | a group of organisms of the same species in an ecosystem |
| community | a group of organisms that live in the same area and interact with one another |
| biotic | living |
| abiotic | nonliving |
| habitat | The place where an organism lives; its home |
| niche | The role a plant or an animal plays in its habitat |
| narrow niche | when an organisms has a very specific way of living and eats only specific things |
| broad niche | when an organism can eat many different kinds of foods and can live in many different places |
| tropical | most diverse climate zone |
| polar | least diverse climate zone |
| limiting factors (4 things needed to survive) | food, shelter, water, space |
| consumer | organism that cannot make its own food |
| herbivore | eats only producers |
| producer | organism that can make its own food |
| carnivore | eats only meat |
| omnivore | eats both plants and animals |
| food chain | transfer of energy from one organism to the next in ecological order |
| photosynthesis | process in which plant and plantlike organisms make their own food |
| food web | overlapping food chains |
| extinction | plant or animal species that no longer exists |
| succession | a gradual change of organisms in an ecosystem |
| decomposer | organism that breaks down dead plants and animals |
| scavenger | organism that eats dead plants and animals |
Created by:
southeaglestudent
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