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Amphibian Skin
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In this activity, learners explore the concept of permeability to better understand why amphibians are extremely sensitive to pollution.
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Measuring and Protecting Skin
Source Institutions
In this activity, learners compare and contrast their own skin (including the area covered) with that of an orange.
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Sand Paper Rankings
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In this activity (2nd activity on the page), learners explore the sensitivity of their sense of touch.