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<br />. <br /> <br />4. The lessons on change of state were extended into <br /> <br />an exercise on the water cycle. The students were told to <br /> <br />imagine they were a crystal of ice in the mountains near <br /> <br />Leadville, Colorado, the headwaters of the Arkansas River. <br /> <br />They were then led through the process of that single <br /> <br />crystal melting (change of state) and moving from the <br /> <br />mountains through the Colorado Springs water system, through <br /> <br />the Colorado Springs waste treatment system and, through <br /> <br />evaporation and precipitation (change of state) back into <br /> <br />the crystal of ice. The students then had to write a paper <br /> <br />explaining this process. <br /> <br />. <br /> <br />5. Students were next taken to the Fountain, Colorado <br /> <br />Waste Water Treatment Plant for a tour and detailed <br /> <br />explanation of the processes of that plant. Later a tour of <br /> <br />the WWSD water and waste treatment plants will be <br /> <br />incorporated into this part of the curriculum. <br /> <br />. <br /> <br />6. From this part of the curriculum students should <br /> <br />understand the states of matter, the finite quantity of <br /> <br />water in the world, the complexity of the water cycle, and <br /> <br /> <br />the cost associated with water treatment and waste <br /> <br />14 <br />