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    Colorado State University
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    In this quick activity/demonstration about density, learners examine what happens when two cans of root beer--one diet and one regular--are placed in a large container of water. Do they sink or...

    1 cent - $1 per group Ages 4 - 14 Under 5 minutes
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    Colorado State University
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    In this activity about phase change and condensation, learners boil water in an empty pop bottle in the microwave. Then, learners stretch a balloon over the mouth of the bottle and will be...

    1 cent - $1 per group Ages 8 - 14 Under 5 minutes
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    Colorado State University
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    In this activity, learners examine raindrop bottles (prepared ahead of time) to observe in slow motion the behavior of falling droplets and explore concepts such as drag and terminal velocity. As...

    1 cent - $1 per student Ages 8 - 14 5 to 10 minutes
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    Colorado State University
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    In this activity, learners explore how air warms when it condenses water vapor or makes clouds. To see this in action, learners use their hands and breath to examine how evaporation cools things...

    1 cent - $1 per student Ages 8 - 18 5 to 10 minutes
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    Colorado State University
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    This is a quick activity/demonstration that introduces learners to the concept of index of refraction. Learners place stirring rods in a jar of water and notice they can see them clearly. They will...

    1 cent - $1 per group Ages 8 - 18 Under 5 minutes
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    Colorado State University
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    In this activity, learners use an old CD to construct a spectroscope, a device that separates light into its component colors. Learners will hold it up to various light sources to examine how...

    1 cent - $1 per student Ages 8 - 18 10 to 30 minutes