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    Colorado State University
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    In this demonstration, learners can observe a number of small convection cells generated from a mixture of aluminum powder and silicon oil on a hot plate. This demonstration helps learners...

    $5 - $10 per student Ages 8 - 14 5 to 10 minutes
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    The Exploratorium
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    In this hands-on and feet-on excursion, learners take a science walk to visualize the planet's immense size and numerous structures, without the usual scale and ratio dimensions found in most...

    1 cent - $1 per group Ages 11 - 18 45 to 60 minutes
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    American Association for the Advancement of Science
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    Learners model the ocean currents that carry hot water from the tropics to northern latitudes. By placing small containers of hot and cold water inside a larger container of cold water, learners...

    $1 - $5 per group Ages 8 - 11 10 to 30 minutes
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    IEEE
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    In this activity, learners explore how engineers have met the challenge of keeping foods, liquids, and other items cool. Learners learn about heat transfer, vacuums, and insulation and design a...

    $10 - $20 per group Ages 8 - 18 1 to 2 hours
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    The Exploratorium
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    In this activity, learners explore liquid crystals, light and temperature. Using a postcard made of temperature-sensitive liquid crystal material, learners monitor temperature changes. By observing...

    $1 - $5 per student Ages 8 - 18 10 to 30 minutes
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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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    The Exploratorium
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    In this activity, learners investigate convection by using food coloring and water of different temperatures. Through this experiment, learners discover the effect of gravity, density, and...

    1 cent - $1 per group Ages 11 - 18 45 to 60 minutes
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    Learners cover a bottle with a balloon. When they immerse the bottle in warm water, the balloon inflates. When they immerse the bottle in a bowl of ice, the balloon deflates. Learners understand...

    1 cent - $1 per group Ages 8 - 14 5 to 10 minutes
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    Centers for Ocean Sciences Education Excellence
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    In this activity, learners explore density, convection, stratification, and, by inference, the melting of icebergs. Learners make hypotheses, test their hypotheses, and explain their observations.

    1 cent - $1 per group Ages 11 - 18 30 to 45 minutes
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    TERC
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    Based on color photographic images, learners compare geological features on Earth and Mars to understand similarities and differences between the two planets, and consider the forces that created...

    1 cent - $1 per group Ages 11 - 18 45 to 60 minutes

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