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In this activity related to the human circulatory system (on page 10 of the PDF), learners observe the dispersion of a drop of food coloring in water, draw conclusions about the movement of dissolved

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.

This is an activity (located on page 4 of the PDF under What's Nano? Activity) about size and scale.

In this activity, learners observe how salinity affects the freezing point of water by making and enjoying ice cream.