| Term | Definition |
| Shows how energy passes from one living thing to another living thing in a certain area or environment | food chain |
| Place where a living thing's needs are met | habitat |
| Animals that eat other animals to get food energy. | carnivore |
| Animals that eat plants to get food energy | herbivore |
| Animals that eat both plants and animals to get food energy | omnivore |
| Animals that hunt other animals for food | predators |
| Animals that are hunted by other animals | prey |
| What is an organism? | a living thing |
| Organisms that use water, air, and sunlight to make their own food and food energy | producers |
| What are the only living things that can make their own food | plants |
| A living thing that eats(consumes) other living things to get food energy | consumer |
| A consumer that breaks down the bodies of dead plants and animals into smaller pieces. This helps the food energy inside the dead bodies get back into the soil | decomposer |