| A | B |
|---|
| Coastal Plain | This is along the Atlantic Ocean and the Gulf of Mexico. It is made up of broad lowlands and good harbors. |
| Appalachian Mountains | It is west of the Coastal Plain and extends from Canada to Alabama. It is old eroded mountains; the oldest in North America. |
| Canadian Shield | It is around the Hudson Bay in a horseshoe shape. It has the oldest rock in North America. |
| Interior Lowlands | They are between the Appalachian Mountains and the Great Plains. It has flat lands with rivers, broad valleys and grassy hills. |
| Great Plains | They are between the Interior Lowlands and the Rocky Mountains. They are very flat grasslands that gradually increase in elevation toward the mountains. |
| Rocky Mountains | They are between the Great Plains and the Basin and Ridge region. They are made up of rugged mountains which stretch from Alaska to Mexico. The Continental Divide is located here. |
| Basin and Ridge | It is between the Rocky Mountains and the Sierra Navadas and the Cascades. It has various elevations and isolated mountain ranges. Death Valley is located here. |
| Coastal Range | Rugged mountains along the Pacific Ocean from California to Canada. It contains fertile valleys. |
