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    The Exploratorium
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    In this activity, learners use heat to separate zinc and copper in a penny. This experiment demonstrates physical properties and how physical change (phase change) can be used to separate matter.

    1 cent - $1 per student Ages 11 - 18 5 to 10 minutes
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    NISE Network
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    The Let's Do Chemistry "Build a Battery" activity lets participants learn how batteries work and how materials behave, change, and interact by building their own simple battery out...

    $10 - $20 per group Ages 6 - adult 5 to 10 minutes