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In this activity, learners use pop-beads to understand the characteristics and properties of polymer chains.

In this three-part activity, learners conduct simple experiments to see how light refracts and reflects, and how colors of light affect what we see.

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

In this activity about light and refraction, learners discover how a lens creates an image that hangs in midair.

In this four-part activity, learners explore light and sound through a variety of hands-on investigations.