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In this activity, learners add food coloring to hot and cold water to see whether heating or cooling affects the speed of water molecules.

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

$5 - $10 per group Ages 11 - 14 45 to 60 minutes
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In this activity, learners explore how hot and cold water move. Learners observe that temperature and density affect how liquids rise and fall.

$1 - $5 per student Ages 4 - 11 45 to 60 minutes
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In this activity, learners examine the parts of a thermometer. After placing a thermometer in hot and cold water, learners look at molecular model animations of the liquid in a thermometer.

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