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In this activity, learners investigate diffusion by creating underwater "fireworks" using food coloring, oil and water.

Learners observe working lava lamps to understand how they work (included in PDF link).

In this chemistry activity, learners explore density by using four solids and 6 liquids to create colorful, layered rows.

In this chemistry demonstration, learners investigate the rule "likes dissolve likes" by combining three, immiscible liquids to create a colorful density column.

In this activity, learners will explore how a hydrometer works by building a working model and conducting experiments.