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    The Exploratorium
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    In this activity, learners make a black box device that serves as an excellent analogy to Rutherford's famous experiment in which he deduced the existence of the atomic nucleus. Learners roll...

    $1 - $5 per group Ages 14 - 18 30 to 45 minutes
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    Twin Cities Public Television
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    In this quick activity about size and scale (on page 2 of the PDF), each learner will be given an image of an object and communicate with other members of the group to arrange the objects they are...

    free Ages 8 - 14 10 to 30 minutes