| A | B |
|---|
| contiguous. | Next to each other. |
| region. | An area in which many features are similar. |
| relative region. | The position of one place compared to other places. |
| continent. | One of Earth's seven largest land masses. |
| population. | The number of people who live in an area. |
| landform region. | A region that has similar landforms throughout. |
| climate. | The kind of weather a place have over a long time. |
| mountain range. | A group of connected mountains. |
| erosion. | The gradual wearing away of the Earth's surface. |
| prairie. | An area of flat or rolling land covered mostly by grasses. |
| environment. | The surroundings in which people,plants,and animals live. |
| inlet. | Any area of water extending into the land from a larger body of water. |
| gulf. | A large inlet. |
| sound. | A long inlet that separates offshore islands from the mainland. |
| tributary. | A stream or river that flows into a large stream or river. |
| river system. | A river and its tributaries, |
| drainage basin. | The land drained by a river system. |
| fall lime. | A place where the land drops sharply,causing rivers to form waterfalls or rapids. |
| elevation. | The height of land in relation to sea level. |
| natural vegetation. | The plant life that grows naturally in a place. |
| arid. | Dry. |
| tundra. | A cold dry region where trees cannot grow. |
| land use. | How the land is used. |
| natural resource. | Something found in nature,such as soil,plants,water,or minerals that people can use to meet their needs. |
| renewable resource. | Resource that can be made again by people or nature. |
| nonrenewable resource. | Resource that cannot be made again by people or nature. |
| modify. | To change. |
| irrigation. | The use of cannals,ditches,or pipes to move water. |
| efficiency. | Using less energy to do the same tasks. |
