| A | B |
| organism | any living thing |
| population | all the members of a single type of organism in an ecosystem |
| community | all the living things in an ecosystem |
| producer | an organism such as a plant that makes its own food |
| consumer | an organism that eats producers or other consumers |
| decomposer | an organism that breaks down dead plant and animal material |
| predator | an animal that hunts for food |
| prey | the animals that predators eat |
| herbivore | an animal that eats only plants |
| carnivore | an animal that eats only other animals |
| omnivore | an animal that eats both plants and animals |
| food chain | a series of organisms that depend on one another for food |