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    NASA
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    In this activity, learners discover that one way to cool an object in the presence of a heat source is to increase the distance from it or change the angle at which it is faced. Learners perform an...

    1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    Learners work in teams to design and build solar water heating devices that mimic those used in residences to capture energy in the form of solar radiation and convert it to thermal energy. This...

    $10 - $20 per group Ages 14 - 18 1 to 7 days
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    How does a green roof, or roof covered by plants, affect the temperature of the inside and outside of a building? Learners design and build houses to find out the answer. In doing so, they need to...

    $1 - $5 per group Ages 11 - 14 1 to 2 hours
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    Oregon Museum of Science and Industry
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    Learners make a refrigerator that works without electricity. The pot-in-pot refrigerator works by evaporation: a layer of sand is placed between two terra cotta pots and thoroughly soaked with...

    $1 - $5 per group Ages 11 - 14 45 to 60 minutes