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    The Exploratorium
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    In this physics activity, learners assemble and/or investigate a pendulum "snake." Several large steel hex-nuts are suspended on strings of successively increasing length to form a series...

    $10 - $20 per group Ages 8 - 18
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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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    NOAA
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    In this 7-10 day investigation, learners develop an understanding of waves and tides and their motion through discussion, demonstration, and hands-on activities. Learners demonstrate wave motion in...

    $1 - $5 per group Ages 11 - 14 1 to 4 weeks
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    The Exploratorium
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    In this activity, learners build a Wilberforce Pendulum, a special coupled pendulum in which energy is transferred between two modes of vibration, longitudinal ("bounce') and torsional (...

    $10 - $20 per group Ages 11 - 18 10 to 30 minutes
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    American Association of Physics Teachers
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    This lab activity has learners create a pendulum with a one-second period. Learners explore different physical properties as variables, such as length of the string and mass of the bob, to...

    $1 - $5 per student Ages 11 - adult 45 to 60 minutes
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    Oregon Museum of Science and Industry
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    This lesson (on pages 15-24 of PDF) explores how sound is caused by vibrating objects. It explains that we hear by feeling vibrations passing through the air. Learners take part in several...

    $1 - $5 per group Ages 4 - 18 10 to 30 minutes
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    Community Science Workshop Network
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    In this activity, learners explore sound by constructing their very own bagpipe instrument. Learners use PVC pipe, a ziploc bag, rubber tubing, rubber bands, a plastic bottle, and a rubber glove to...

    $5 - $10 per student Ages 6 - 11 45 to 60 minutes
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    Community Science Workshop Network
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    In this activity, learners build their own sound machines and explore the interplay of motion and sound. This engineering activity introduces learners to automata, rotational motion, cranks and...

    $5 - $10 per student Ages 6 - 14 45 to 60 minutes