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In this activity, learners will measure the length of a shadow and use the distance from the equator to calculate the circumference of the earth.

Learners work in teams to design and build solar water heating devices that mimic those used in residences to capture energy in the form of solar radiation and convert it to thermal energy.

Learners construct one or more of the following kinds of sundials: a shadow plot, a horizontal sundial, and a diptych sundial.

This activity shows you how to make amazing crystal spikes using Epsom salt and the sun.