| Answer | % Correct |
|---|---|
| Appalachian Mountains | 100%
|
| Mississippi River | 100%
|
| Missouri River | 100%
|
| Rocky Mountains | 100%
|
| Great Lakes | 93%
|
| Colorado River | 86%
|
| Sierra Nevada Mountains | 86%
|
| San Andreas Fault | 79%
|
| Ozark Mountains | 57%
|
| Cascadia Subduction Zone / Yellowstone Volcano Chain | 50%
|
| Ogalalla Aquifer | 21%
|
| Devil's Tower | 14%
|