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In this activity learners compare the bounciness of warm and cold racquetballs to see if temperature makes a difference in how well they bounce.

$1 - $5 per student Ages 8 - 14 10 to 30 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 on page 8 of the PDF, learners make a slimy substance very similar to mucus, and sprinkle it with glitter to imitate the way that allergens are trapped.

$5 - $10 per student Ages 6 - 18 10 to 30 minutes