| A | B |
|---|
| inlet | any area of water extending into the land from a larger body of water |
| gulfs | the largest inlets. example: Gulf of Mexico |
| sound | long inlet that separates offshore islands from the mainland |
| Great Lakes | Superior, Michigan, Huron, Erie, Ontario |
| tributary | a stream or river that flows into a larger stream or river |
| river system | a river and its tributaries |
| drainage basin | land drained by a river system |
| Mississippi River | largest river system in the United States |
| fall line | place where the land drops sharply, causing rivers to form waterfalls or rapids |
| Continental Divide | separates rivers that flow into the Atlantic from rivers that flow into the Pacific. |
| elevation | the height of the land in relation to sea level |
| natural vegetation | plant life that grows naturally in a place |
| arid | dry |
| tundra | cold, dry area |
| land use | how the land is used |
| natural resource | something found in nature that people can use |
| renewable resource | resources that can be made again by people or nature |
| nonrenewable resource | resources that cannot be made again by people, or resources that would take thousands of years for nature to replace. |
| modify | change |
| irrigation | the use of canals, ditches or pipes to move water |
| efficiency | using less energy to do the same tasks |
