| A | B |
|---|
| landform region | a geographic area with similiar landforms throughout |
| Coastal Plain | area of low, flat land along the Atlantic and Gulf coasts of the United States |
| Appalachian Mountains | oldest mountain range in North America |
| erosion | the gradual wearing away of the Earth's surface by wind and water |
| Piedmont | the region of low hills and broad valleys located between the Atlantic Coastal Plain and the Appalachian Mountains |
| elevation | the height of the land |
| fall line | the point where the elevation of the land drops suddenly |
| Central Plains | the eastern part of the Interior Plains |
| Great Plains | the western part of the Interior Plains |
| plateau | a broad area of high, mostly flat land |
| Rocky Mountains | the Great Plains extend westward to this mountain range |
| Intermountain Region | large area of land between the Rockies and the western mountain ranges |
| basin | low, bowl-shaped area with higher ground all around it |
| Cascade Range | Mountain range located along the eastern border of northern California, Oregon and Washington |
| Sierra Nevada | mountain range running along the eastern border of California |
| Coast Ranges | mountains which run along the western coast of the United States |
| Denali | also known as Mt. McKinley |
