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Learners add two dyes to mineral oil and water, and then compare their miscibility (how well they mix) in each.

$1 - $5 per group Ages 8 - 18 5 to 10 minutes
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Visitors observe a graduated cylinder with a golf ball floating about halfway in liquid. The bottom half of the cylinder contains a concentrated solution of salt.

$1 - $5 per group Ages 6 - 14 Under 5 minutes