| A | B |
|---|
| geography | The study of Earth and the things on it |
| environment | The surroundings in which people, plants, or animals live. |
| climate | The pattern of weather of an area over a long period of time |
| conservation | The careful use of natural resources. |
| fuel | Anything that creates heat or energy. |
| pollution | What makes our air, water., or soil dirty |
| nonrenewable resource | A resource of which there is a limited supply. |
| St. Lawrence River | A river shared by the United States and Canada. |
| Mississippi River | The longest river in North America. |
| temperature | A measure of hot or cold the air is. |
| precipitation | The moisture that falls to the ground. |
| Rocky Mountains | These stretch through the western U.S. |
| Appalachian Mountains | These stretch from Maine to Alabama. |
| plateau | A high flat area that risees steeply above the surrounding land. |
| basin | a low, bowl-shaped landform surrounded by higher land. |
| plain | A large area of nearly flat land. |
| landforms | The shapes that make up the Earth's surface. |
| desert | A place where little rain falls |
| elevation | The height of the land above the level of the sea. |
| natural resource | Something in the environment that people can use. |
