| Term | Definition |
| Food Chain | When the 1st order consumer eats the producer, then the consumer gets eaten by the 2nd order consumer, then that gets eaten by the 3rd order consumer and the decomposers finish it off. |
| Ecosystem | A place where animals live and interact. |
| Riparian | An ecosystem along side or with water. |
| Producer | A plant uses the process of photosynthesis to make food. |
| Consumer | An organism that eats the producer. |
| Herbivore | An organism that eats only plants. |
| Carnivore | An organism that eats only meat. |
| Prey | The thing being hunted. |
| Predator | The thing that is hunting. |
| Trophic Level | The organisms that get eaten first, second, third, and then last. |
| Omnivore | An organism that eats both plants and meat. |
| Food Web | A more complicated food chain. |
| Decomposers | Bacteria that break down dead organisms. |
| Biomass | How much one type of organisms put together weighs. |
| Biomagnification | DDD, a harmful chemical used to kill pests. |