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    NSBRI
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    In this activity related to indoor air pollution, learners build take-home dust catchers with wax paper and petroleum jelly. After a set monitoring period, learners conduct representative particle...

    $5 - $10 per group Ages 8 - 14 1 to 2 hours
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    In this activity (page 26 of the PDF), learners make observations, formulate hypotheses and design a controlled experiment, based on the reaction of carbon dioxide with calcium hydroxide. This is...

    $5 - $10 per group Ages 8 - 18 1 to 7 days

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