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    Colorado State University
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    The demonstration/experiment provides quick proof that air has mass. Learners measure the mass of a 2-liter bottle attached with special "Fizzkeeper" cap before and after extra air...

    $1 - $5 per group Ages 8 - 14 5 to 10 minutes
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    Colorado State University
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    This demonstration/activity helps learners understand why higher elevations are not always warm simply because "hot air rises." Learners use a tire pump to increase the pressure and...

    $1 - $5 per group Ages 8 - 18 10 to 30 minutes

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