| A | B |
|---|
| predator | animal that kills and eats another animal |
| immigrants | animals that move into a population and increase the population |
| community | biotic parts of an ecosystem |
| limiting factor | anything that keeps the size of a population from increasing |
| energy pyramid | diagram that shows energy loss |
| food web | food chains connected together |
| population | group of the same kind of living things in an area |
| biotic | living parts of an ecosystem |
| decomposer | living thing that gets its food from dead matter |
| emigration | movement of animals out of an area |
| parasitism | relationship in which one member is harmed |
| prey | animal a predator kills and eats |
| mutualism | relationship in which two organisms live together and depend on each other |
| commensalism | relationship in which tow organisms live together; one benefits while the other is unaffected |
| ecology | study of organisms interacting with each other and their environment |
