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

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

Learners pour equal amounts of coffee, mineral oil, corn syrup, and alcohol into a beaker. The liquids resolve into stacked layers, and learners can infer which liquids are the most and least dense.