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In this activity about water solubility and density, learners use critical thinking skills to determine why water can dissolve some things and not others.

$5 - $10 per student Ages 8 - 11 10 to 30 minutes
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In this activity, learners apply a dissolving test to known crystals to identify the unknown. Since the unknown is chemically the same as one of the known crystals, it should dissolve similarly.

$1 - $5 per group Ages 8 - 14 10 to 30 minutes