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    WGBH
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    In this fascinating and fun experiment, learners use chemistry to identify a mystery powder and to solve a "crime," a process similar to that used by real forensic scientists. Learners...

    $5 - $10 per group Ages 6 - 11 45 to 60 minutes
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    COSI
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    In this chemistry activity (page 6 of the PDF), learners observe a chemical change. Learners write and reveal a secret message using edible ink. Learners use their critical thinking skills to...

    $5 - $10 per group Ages 8 - 14 10 to 30 minutes
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    Oregon Museum of Science and Industry
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    In this experiment, learners will conduct chemical and physical tests to identify mystery substances. This experiment is very flexible, allowing educators to determine the number of unknowns to...

    $5 - $10 per group Ages 8 - 14 45 to 60 minutes