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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.

In this activity related to nanotechnology, learners observe some of the effects that result from creating a thin layer of material several nanometers thick.

Learners conduct two activities to investigate two properties of liquids: density and viscosity. In a clear container, learners stack 7 different liquids which will layer according to their density.

In this activity (posted on March 14, 2011), learners follow the steps to construct a camera projector to explore lenses and refraction.