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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    In a class demonstration, learners observe a simple water cycle model to better understand its role in pollutant transport. When polluted water evaporates, the pollutants remain behind, becoming...

    $5 - $10 per group Ages 8 - 14 30 to 45 minutes
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    American Chemical Society
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    What causes frost to form on the outside of a cold container? In this activity, learners discover that liquid water can change states and freeze to become ice. This can be used as a follow-up...

    1 cent - $1 per group Ages 8 - 14 10 to 30 minutes