Comparing The Density of Liquids, Solids, And Gases
Students compare the relative densities of different liquids, first by layering them on top of each other, and then by weighing equal amounts of the liquids. They explore the density of air versus the density of water.
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Changing the Density of a Liquid - Adding Salt
Fourth in a set of several little lessons on density, this one compares the density of fresh and salt water. First by demonstration, and then by a hands-on activity, learners find that adding salt increases the density, as is evidenced...
3rd - 8th Science