| A | B |
|---|
| tundra | a cold dry region where trees cannot grow |
| fall line | place where the land drops sharply and forms waterfalls or rapids |
| drainage basin | the land drained by a river system |
| contiguous | next to each other, share a border |
| arid | dry |
| natural resource | something found in nature that people can use |
| erosion | the gradual wearing away of the earth's surface |
| renewable resources | resources that can be made again by people or nature |
| nonrenewable resources | resources that cannot be made again by people |
| natural vegetation | the plant life that grows naturally in a place |
| inlet | any area of water extending into the land froma larger body of water |
| continents | Earth's seven largest land masses |
