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How Loud is Too Loud
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In this activity (described on pages 39-42 of PDF), learners make a paper wheel (on pages 57-60 of PDF) that shows them the relative loudness of different sounds.
Bend It, Break It
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In this activity (on pages 25-32 of PDF), learners make models of the inner ear out of pipe cleaners.
Bring it into Focus
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In this activity (page 2 of PDF), learners play with a lens and a piece of paper to focus an image on the paper. Learners look at different things, and see how the lenses affect the image.
Rainbow Glasses
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In this activity, learners explore light, color and rainbows by making their own rainbow glasses.