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In this activity, learners discover that as the salinity of water increases, the density increases as well. Learners prove this by attempting to float fresh eggs in saltwater and freshwater.

In the kitchen, learners can perform their own density investigation.

In this chemistry activity, learners use spaghetti to explore density and chemical reactions.

In this chemistry activity (on page 2 of the PDF), learners make a layered drink with liquids of different densities.

Learners observe a tank of water containing cans of diet and regular sodas. The diet sodas float and the regular sodas sink. All the cans contain the same amount of liquid and the same amount of air.

In this hands-on activity, learners make the world's simplest Cartesian diver, using only a plastic bottle, some water, and a condiment packet.

This is a highly visual demonstration that illustrates both the effects of density and chemical reactions.