| Term | Definition |
| environment | The area around a living thing |
| wetland | An area that is often flooded |
| piedmont | An area with many hills, between the coastal plain and the mountains |
| habitat | The place where a plant or an animal lives |
| mountain | A high, raised part of Earth's surface |
| drought | A long period of time with very little rain |
| ecosystem | All the living and nonliving things that interact in an environment |
| coastal plain | An area of low, flat land near an ocean |
| balance | Not too many and not too few of a kind of living thing |