| A | B |
|---|
| Texas | The largest Southwestern state |
| plateau | A large area of flat land |
| Colorado Plateau | A region west of the Rockies that has smaller mountain ranges and plateaus |
| canyon | A deep, narrow valley |
| Grand Canyon | The biggest canyon in the Colorado Plateau |
| erosion | The slow wearng away of soil by water, wind, or ice |
| Rio Grande | The river that forms the border between Texas and Mexico |
| mesa | A small, flat-topped hill |
| Painted Desert | Colorful desert in Arizona |
| Colorado River | The river that has eroded the Grand Canyon |
