| A | B |
|---|
| Megalopolis | Connected area of urban communities. |
| Prairie | Rolling inland grasslands with fertile soil. |
| Canyon | Grand deep valley with steep sides. |
| Contiguous | Joined together inside a common boundary. |
| Cordillera | Group of mountain ranges that run side by side. |
| Navigable | Wide and deep enough to allow the passage of ships. |
| Glacier | Giant sheets of ice that helped form the Great Lakes. |
| Divide | High point that determines the direction rivers flow. |
| Great Plains | Prairie in the midwest. |
| Continental Divide | Formed by the Rocky Mountains and determines where rivers flow in the US. |
| Tornado Alley | area in the Central US with a low elevation. |
