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In this activity, learners use an old CD to construct a spectroscope, a device that separates light into its component colors.

This is a quick activity/demonstration that introduces learners to the concept of index of refraction. Learners place stirring rods in a jar of water and notice they can see them clearly.

In this quick activity/demonstration about density, learners examine what happens when two cans of root beer--one diet and one regular--are placed in a large container of water.

In this activity, learners explore how air warms when it condenses water vapor or makes clouds.

In this activity about phase change and condensation, learners boil water in an empty pop bottle in the microwave.