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Learners use a commercially available toy to experiment with density. They fill a chamber in the toy submarine with baking powder and release it into a tank of water.

Like water drops in falling rain, a CD separates white light into all the colors that make it up.

Learners combine hydrogen peroxide with three different forms of potato: raw chunks, ground chunks, and boiled chunks.

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