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    Twin Cities Public Television
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    This is an activity (located on page 4 of the PDF) about surface area and reactivity. Learners will perform a variation on the popular soda geyser activity, using different sizes of rock material...

    $10 - $20 per group Ages 8 - 14 1 to 2 hours
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    The Science House
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    In this chemistry activity, learners use yeast and hydrogen peroxide to generate a gas (oxygen) and test some of its properties. This resource includes brief questions for learners to answer after...

    $1 - $5 per group Ages 11 - 18 5 to 10 minutes
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    Sciencenter
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    In this chemistry challenge, learners identify which plants have the enzyme "catalase" that breaks hydrogen peroxide into water and oxygen. Multiple fruits and vegetables, both raw and...

    $5 - $10 per group Ages 4 - 14 10 to 30 minutes
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    Make
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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