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In this lab activity, learners explore how to initiate a density current. Learners measure six flasks with different concentrations of salt and water (colored blue).

In this activity, learners explore density, convection, stratification, and, by inference, the melting of icebergs. Learners make hypotheses, test their hypotheses, and explain their observations.

Learners act as engineers and design mini submarines that move in the water like real submarines.

In this activity, learners investigate convection by using food coloring and water of different temperatures.

This activity about density provides instructions for making a miniature "lava lite" with just salt, oil, water, and food coloring.

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