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Ecosystem
| Term | Definition |
|---|---|
| Organism | A living thing |
| Habitat | An environment that a specific organism needs to live, grow, and reproduce |
| Biotic factor | The part of a habitat that are or were once alive |
| Abiotic factors | Non living thing |
| Species | A group of organisms that can mate with each other and produce offspring |
| Population | All the members of one species living in a particular area |
| Community | All the different populations that living together in an area |
| Ecosystem | Living and non living things living in a particular area. |
| Ecology | The study of how organisms interact with each other and with their environment |
| Population density | The number of individuals in an area of a specific size |
| Limited factor | An environmental factor that causes a population to stop growing or to decrease |
| Carrying capacity | The largest population that an area can support |
| Producer | An organism that can make its own food |
| Consumer | Feeds on other organisms to obtain energy |
| Decomposer | Breaks down biotic wastes and dead organisms |
| Food chain | A series of events in which one organism eats another and obtains energy |
| Food web | Consists of many overlapping food chains |
| Energy pyramid | Shows the amount of energy that moves from one feeding level to another |
| Photosynthesis | The set of chemical reactions plants use to turn light, water, and nutrients into oxygen and energy |
| Chlorophyll | Absorbs light |
| Autotroph | An organism that makes its own food |
| Heterotroph | An organism that has to get its food from a source and unable to make it’s own food |
| Niche | How an organism obtains it’s food, the type of food the organism eats and what other organisms eat it. |
| Competition | The struggle between organisms to survive as they use the same limited resources |
| Predation | An interaction in which one organism kills another for food or nutrients |
| Symbiosis | Any relationship in which two species live closely together |
| Commensalism | A relationship in which one species benefits and the other species is neither helped nor harmed |
| Mutualism | A relationship in which both species benefit |
| Parasitism | A relationship that involves one organism with, on, or inside another organism and harming it |
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