| Answer | % Correct |
|---|---|
| Appalachian Mountains | 100%
|
| Mississippi River | 100%
|
| Missouri River | 100%
|
| Rocky Mountains | 100%
|
| Great Lakes | 92%
|
| Colorado River | 85%
|
| Sierra Nevada Mountains | 85%
|
| San Andreas Fault | 77%
|
| Ozark Mountains | 62%
|
| Cascadia Subduction Zone / Yellowstone Volcano Chain | 54%
|
| Ogalalla Aquifer | 23%
|
| Devil's Tower | 15%
|