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Spring. March. Activity to name the place of an object![](https://assets.api.bookcreator.com/Y45ymsSwjwWkNjZbRb8oqtwqvli1/books/KxOuntZWS_O5QfBcEKheiw/assets/7TTCpjvTR4ekDCPAARfIVQ:m4v/000.jpg?width=850&height=637)
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April. Kids love to experiment. Experiment "Fluid Exchange"Loading...
Dissolve a teaspoon of salt in a glass of water and envelop it tightly in parchment paper. Place the inverted glass in a plate filled with brightly colored water. Although there are no visible holes in the paper, the water in the glass also stains quickly. Because tiny particles of water and paint penetrate the invisible pores of the partition. We call such fluid exchange through a waterproof partition osmosis. All living cells are surrounded by such partitions.
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