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In this activity (pages 17-31), learners are introduced to techniques that are used to determine the structures of solid materials.

Learners shine the light of a laser pointer through sheets of fabric that all have a different number of threads per inch.

In this activity on page 13 of the PDF, learners use a laser pointer (with known wavelength of light) to measure the thickness of a human hair.

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