| A | B |
|---|
| Gulf of Mexico | part of the Atlantic Ocean. It is almost completely surrounded by Mexico and the U.S. |
| Mississippi River | longest river in the U.S. |
| Colorado River | one of the major rivers in the U.S. |
| Great Plains | broad, high plains of central U.S. |
| Pacific Ocean | largest group of fresh water lakes in the world. |
| Rocky Mountains | largest mountain range in North Amercia. |
| Death Valley | the lowest point in the U.S. |
| Sierra Nevada Mountains | high mountains found in California. |
| Atlantic Ocean | second largest body of water. |
| Mount McKinley | the hight point in the U.S. |
| Great Lakes | largest group of fresh water lakes in the world. |
| Appalachian Mountains | oldest moutnains in the U.S. |
| Urban | densely populated. |
| Megalopolis | super city made up of connected urban areas. |
| Rural | sparsely populated. |
