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    American Physical Society
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    Learners build a pendulum from a yo-yo, and then design their own experiment to determine what affects the pendulum's period of swing. They can alter the mass of the yo-yo by adding play dough...

    $1 - $5 per group Ages 11 - 14 45 to 60 minutes
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    American Physical Society
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    Learners drop two different masses of play dough and observe how long it takes them to hit the ground. Learners also drop two pieces of paper of the same material and size, one crumpled and one...

    $1 - $5 per student Ages 11 - 14 30 to 45 minutes
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    American Physical Society
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    In this physics activity, learners use square blocks to explore how towers fall. Learners attach a piece of string to the side of a block and then construct a tall tower on top of this base block....

    1 cent - $1 per student Ages 8 - 14 5 to 10 minutes

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