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    In this activity (page 6 of the PDF), learners will observe both a chemical and a physical change. By experimenting with plaster of paris, students will differentiate between these types of changes...

    Over $20 per group Ages 8 - 18 4 to 24 hours
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    American Chemical Society
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    In this activity on page 7 of the PDF, learners experiment with the interesting designs that can be made by painting on plaster. Learners discover the chemistry behind fresco, an art technique made...

    $10 - $20 per student Ages 6 - 14 10 to 30 minutes

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