| A | B |
|---|
| Abiotic | Pertaining to non-living parts of the environment |
| Autotroph | Producer; any organism that can produce its own energy molecules |
| Biome | Level of Organization; areas with similar precipitation and temperature |
| Biosphere | Level of Organization; the portion of Earth in which life exists |
| Biotic | Pertaining to living parts of the environment |
| Carrying Capacity | Maximum number of organisms a population can support without stress |
| Community | Level of Organization; multiple species interacting with each other |
| Conservation | Study of how human interactions affect and destroy or preserve their environments |
| Density-dependent | Factors in a population that have less/greater impact based on population size |
| Density-independent | Factors in a population that have no change in impact based on population size |
| Ecology | Study of all interactions between organisms and external environments |
| Ecosystem | Level of Organization; concerned with how abiotic and biotic factors interact |
| Endangered | Species that shows a continuous downward trend in population |
| Extinction | Species that is not longer present and/or able to reproduce |
| Fragmentation | Separating sections of a habitat with an artificial barrier |
| Habitat | Location where an organism shelters/lives |
| Heterotroph | Consumer; any organism that must obtain energy from outside biotic sources |
| K-selection | Organisms who follow a birth plan requiring constant care of few offspring |
| Matter | Nutrients and elements that the planet cycles through ecosystems |
| Niche | A way an organism lives that reduces its competition and increases survivability |
| Population | Level of Organization; multiple members of the same species interacting |
| R-selection | Organisms who follow a birth plan requiring little care over many offspring |
| Succession | The process of an ecosystem recovering from a disaster |
| Symbiosis | When two species must share a relationship in order for at least one to survive |
| Trophic Level | A hierarchy in an ecosystem showing the flow of matter and energy between organisms |
