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    The Exploratorium
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    In this activity, learners balance chemical equations and discover the law of conservation of mass. Learners use coins to model molecules to balance the equations.

    free Ages 14 - 18 10 to 30 minutes
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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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    The Exploratorium
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    In this chemistry activity, learners explore the amount of copper in a new penny. Learners use toilet bowl cleaner to hollow out the interior of a penny with zinc inside. This experiment will...

    $1 - $5 per student Ages 11 - 18 1 to 7 days

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