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Learners design their own experiment to explore the permeability of different materials such as soil, sand, gravel, and marbles.

In this activity, learners explore the concept of permeability to better understand why amphibians are extremely sensitive to pollution.

This three-part lab helps learners understand the essential principles governing diffusion and osmosis.

In this activity, learners will discover how the thin layers of amphibians' skin allow water and other chemicals to pass through it.