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    NISE Network
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    In this activity, learners find out why some mineral sunblock rubs in clear. Learners compare nano and non-nano sunblocks and discover how particle size affects visibility.

    $5 - $10 per group Ages 4 - adult 5 to 10 minutes
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    The Science House
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    In this chemistry activity, learners use chemical reactions to observe the composition of an alloy. Learners will calculate and record the amount (mass and percentage) of copper and zinc in a penny...

    $5 - $10 per group Ages 11 - 18 30 to 45 minutes
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    Mount Holyoke College
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    In this electrochemistry activity, young learners and adult helpers create a battery from a potato to run a clock. This resource includes background information about electricity, electronics, and...

    $5 - $10 per student Ages 4 - 8 10 to 30 minutes
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    The Exploratorium
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    In this activity about chemistry and electricity, learners form a battery by placing their hands onto plates of different metals. Learners detect the current by reading a DC microammeter attached...

    $5 - $10 per group Ages 6 - 14 10 to 30 minutes
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    Twin Cities Public Television
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    This activity (on page 3 of the PDF) is a full inquiry investigation into conductivity. Learners will harness the surprising electricity of fruit when they create a battery out of a lemon stuck...

    $5 - $10 per student Ages 8 - 14 1 to 2 hours
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    Oregon Museum of Science and Industry
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    Learners observe an electrochemical cell constructed from a small jar containing zinc and copper strips immersed in separate solutions. The strips are connected to a motor that turns a small fan....

    $5 - $10 per group Ages 11 - adult 10 to 30 minutes