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In this chemistry activity, learners will explore the concept of entropy. When learners stretch and unstretch a balloon, they will notice a change in temperature.

1 cent - $1 per student Ages 8 - 11 5 to 10 minutes
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This is an activity about waves. Using marbles, paper clips and rubber bands, learners explore how waves behave.

$1 - $5 per student Ages 4 - 14 10 to 30 minutes
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This is an online activity about what would happen if we could travel at or near the speed of light.

free Ages 11 - 18 5 to 10 minutes
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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.

1 cent - $1 per group Ages 11 - 14 10 to 30 minutes
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In this physics activity, learners experiment with soap bubbles to see what variables affect their size. They explore how soap film and bubbles always seek the smallest surface area possible.

$1 - $5 per student Ages 8 - 11 10 to 30 minutes