| A | B |
| abiotic | non-living factors |
| autotroph | makes its own food (producer) |
| biodiversity | different kinds of life |
| biosphere | anywhere on earth that supports life |
| biotic | living factors |
| carnivore | eats meat (other animals) |
| carrying capacity | number of organisms that can be supported in an area |
| community | combination of all populations |
| competition | struggle for resources |
| consumer | acquires food by eating other organisms |
| decomposer | recycles materials from dead bodies |
| ecological niche | a species' role in its ecosystem |
| ecological succession | changes in habitat over time |
| ecology | study of living and non-living interaction |
| ecosystem | the living and non-living environment |
| energy pyramid | shows the transfer of energy among organisms |
| environment | living and non-living things around an organism |
| finite | limited; has an end |
| food chain | illustrates the relationship between predator and prey |
| food web | interconnected food chains |
| habitat | where organisms live |
| herbivore | eats only plants |
| heterotroph | eats food someone else made (consumer) |
| host | organism that parasites live off of |
| limiting factors | things that control population size |
| parasite | lives off & sometimes harms another organism |
| population | one species in a given area |
| predator | attacker, kills prey |
| prey | victim, is killed/eaten by predator |
| producer | makes its own food |
| scavenger | lives off already dead organisms |