| A | B |
|---|
| Ogallala Aquifer | The largest groundwater source in Texas |
| Edwards Plateau | The major Plateau area of Texas |
| tornadoes | Violent storms with funnel- shaped clouds |
| hurricanes | Storms of high wind and heavy rain |
| erosion | The wearing away of the soil |
| technology | A way of using resources |
| Red | A border river of Texas |
| Rio Grande | A border river of Texas |
| Sabine | A border river of Texas |
| Brazos | A main interior river of Texas |
| Trinity | A main interior river of Texas |
| Colorado | A main interior river of Texas |
| economy | A system of producing goods |
