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Learners observe a bottle containing water and oil. They are invited to pick up the bottle and mix the contents together.

Making liquids of different densities to perfectly lay on top of each other can be a frustrating exercise. The Exploratorium created this activity as a fool proof way of making a density column.

Learners compare the properties and solubilities of Styrofoam (TM), ecofoam packing peanuts, and popcorn. First, the solubility of each substance is tested in water.

In this activity, learners add different liquids to water and apply their working definition of “dissolving” to their observations.