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    Lunar and Planetary Institute
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    In this demonstration, learners compare the relative sizes and masses of scale models of the planets as represented by fruits and other foods. Learners dunk the "planets" in water to...

    $10 - $20 per group Ages 8 - 14 30 to 45 minutes
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    Lunar and Planetary Institute
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    In this activity, learners shrink the scale of the vast solar system to the size of their neighborhood. Learners are challenged to consider not only the traditional "planets," but also...

    Over $20 per group Ages 8 - 14 45 to 60 minutes