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    NOAA
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    In this quick and easy activity and/or demonstration, learners use two empty 2-liter bottles and hot tap water to illustrate the effect of heat on pressure. Learners will be surprised to see what...

    free Ages 6 - 18 5 to 10 minutes
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    American Chemical Society
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    This lesson focuses on molecular motion in gases. Learners compare the mass of a basketball when it is deflated and after it has been inflated. The inflated ball has the greater mass so learners...

    $5 - $10 per group Ages 11 - 14 45 to 60 minutes
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    NOAA
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    In this activity and/or demonstration, learners illustrate visually and physically that air has weight. Learners balance two equally-inflated balloons hanging from string on a yard stick. Learners...

    1 cent - $1 per group Ages 8 - 18 5 to 10 minutes
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    Institute of Physics
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    In this indoor or outdoor demonstration, use a large and small ball to illustrate conservation of energy and momentum. Learners will compare how high the balls bounce when bounced individually or...

    free Ages 4 - adult Under 5 minutes
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    COSI
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    In this physics activity (page 8 of the PDF), learners will explore the concept of inertia by attempting to run and stop quickly. Although this activity was created as a previsit for a workshop...

    1 cent - $1 per group Ages 11 - 14 10 to 30 minutes
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    Children's Museum Of Houston
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    In this activity, learners explore why humans sweat. Learners compare the effects of heat on a balloon filled with air and a balloon filled water. This simulation demonstrates how water in sweat...

    1 cent - $1 per group Ages 6 - 14 5 to 10 minutes