| Term | Definition |
| food chain | how energy is passed from one organism to another in an ecosystem |
| producer | an organism that makes its own food with the envergy from the sun |
| consumer | an organism that must eat another organism to get energy |
| scavenger | an organism that eats dead and decaying matter |
| decomposer | an organism that breaks down dead and decaying material releasing nutrients back into the soil |
| herbivore | organism that eats only plants |
| carnivore | organism that eats only meat |
| omnivore | organism that eats both plants and meat |
| predator | organism that hunts for food |
| prey | organism that is hunted and caught for food |
| food web | shows the interactions or overlapping of many food chains in an ecosystem |