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    In this activity, learners take apart a used zinc-carbon dry cell battery. Besides making for an interesting lesson in electrochemistry, taking apart a spent D-cell also allows learners to salvage...

    $1 - $5 per student Ages 11 - adult 45 to 60 minutes
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    In this activity, learners use a pneumatic trough (see related activity) to generate and collect pure oxygen. Learners will test to see if they've generated oxygen by observing the combustion...

    Over $20 per student Ages 14 - adult 30 to 45 minutes