| Term | Definition |
| aquatic habitat | a habitat in the water such as a pond, marsh, swamp, river, and ocean |
| aquatic organism | animal or plant found in a water habitat |
| carnivore | an animal that eats only other animals |
| consumer | an organism that eats producers other consumers |
| decomposer | an organism that breaks down dead plant and animal material |
| food chain | a series of organisms that depend on one another for food |
| habitat | the home of a living thing |
| herbivore | an animal that only eats plants |
| interdependency | is the relationship between living things that depend on other living things to survive |
| omnivore | an animal that eats both plants and animals |
| organism | another term for a plant or animal |
| predator | an animal that hunts for food |
| prey | an animal that predators eat |
| producer | an organism such as a plant that makes its own food |
| terrestrial | of or relating to land |
| terrestrial organism | an animal or plant found in land habitats such as deserts, grassland, and forests |