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Density: Make a golf ball float!
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In this activity (on page 2 of the PDF), the learner places a golf ball between salt water and colored fresh water. The golf ball is not as dense as the saltwater.
To Dye For
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Learners add two dyes to mineral oil and water, and then compare their miscibility (how well they mix) in each.
Layered Liquids: Chemistry You Can Drink
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In this chemistry activity (on page 2 of the PDF), learners make a layered drink with liquids of different densities.
Crystal Garden
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Visitors observe a tray holding a crystal-covered brick. The crystals were created by evaporation of a solution containing liquid bluing, ammonia, and salt.