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This is a quick activity (on page 2 of the PDF under Stained Glass Activity) about the "Tyndall effect," the scattering of visible light when it hits very small dispersed particles.

In this activity, learners compare different types of salt crystals under a magnifying glass.

This is a quick activity (located on page 2 of the PDF under Nasturtium Leaves Activity) about surface tension.

In this optics activity, learners examine how a transparent material such as glass or water can actually reflect light better than any mirror.