| A | B |
| Ecology | study of interactions between organisms and their environment |
| Biotic | living things in enviroment |
| abiotic | nonliving things in environment |
| Population | group of same species living in same area |
| Community | populations of organisms in a certain area |
| Ecosystem | a community of organisms and the abiotic components that affect them |
| biosphere | part of the earth where all living things exist |
| herbivore | organism that eats plants |
| carnivore | organism that eats animals |
| omnivore | organism that eats both plants and animals |
| food chain | a linear relationship (very simple) showing energy flow from 1 organism to another |
| food web | a complex relationship showing feeding relationships in an ecosystem |
| energy pyramid | shows energy loss/availability in a ecosystem moving from one relationship to another |
| carrying capacity | number of organisms an environment can have due to available resources |
| prey | organism that gets eaten |
| predator | organism that eats the prey |
| symbiosis | Organisms living together for the benefit of both organisms |
| parasitism | organisms living together where one is harmed for the benefit of the other |