| A | B |
| environment | all nonliving things in the area |
| ecosystem | all living and nonliving things in the area |
| basic need | the needs that must be met for a thing to survive |
| resource | anything in an ecosystem that can meet the need of a living thing |
| competition | occurs when living things are trying to use the same resources |
| adaptation | a change in a characteristic of a living thing that allows it to survive in its environment |
| camouflage | a coloring or pattern that allows a living thing to blend into its surroundings |
| mimicry | the ability of a living thing to imitate another living thing |
| migration | the movement of a group of animals from one ecosytem to another |
| hibernate | a deep sleep that some animals go into in the winter months |
| pollution | anything that makes the water, air, or land dirty |
| hypothesis | an idea of the answer to a problem |