| A | B |
|---|
| Coastal Plain | Broad lowland providing many excellent harbors |
| Appalchian Highlands | Old, eroded mountains (oldest mountain range in North America) |
| Interior Lowlands | Rolling flatlands with many rivers, broad river valleys, and grassy hills |
| Great Plains | Flat land that gradually increases in elevation westward; grasslands |
| Rocky Mountains | Rugged mountains from Alska almost to Mexico |
| Basin and Range | Has varying elevations including isolated mountain ranges and fertile valleys |
| Coastal Range | Rugged mountains stretching from California to Canada, contains fertile valleys |
| Death Valley | Lowest point in North America |
| Canadian Shield | Wrapped around Hudson Bay in a horseshoe shape, Hills worn by erosion and hundreds of lakes carved by glaciers |
| Atlantic Ocean | Used by European explorers to reach the New World |
| Columbia River | explored by Lewis and Clark |
| Great Lakes | Midwest, inland ports grew up near these waterways. |
| Ohio River | Gateway to the West |
| Mississippi River | North-South river that was a transportation artery for farm and industrial products and linked to ports and other parts of the world. |
| Missouri River | Westward flowing river that was a transportation artery for farm and industrial products and linked to ports and other parts of the world. |
| Continetal Divide | Determines the directional flow of rivers |
| Pacific Ocean | Ocean that borders the United States on the west. |
