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Measuring Your Blind Spot
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In this activity, learners calculate the width (horizontal diameter) of the blind spot on their retina. Learners make a blind spot tester using a piece of notebook paper.
No Saliva, No Taste?
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In this activity (4th activity on the page), learners test to see if saliva is necessary for food to have taste.
Seeing in the Dark
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In this activity (17th on the page), learners investigate why you cannot see colors in dim light.