Young scholars draw and label the 15 major rivers in Texas. They then draw and label another map with the major lakes and reservioirs of Texas. Students use the maps and locate and label the location of the following major Texas cities: Austin, Brownsville, Corpus Christi, El Paso, Ft. Worth, Houston, Odessa, and San Antonio. They use the information on the maps, to hypothesize as to what is the water sourcec for each city.