Скачать или смотреть An Egg-speriment in Osmosis - Hands-On Learning

Use an egg, along with a couple of household substances, to demonstrate molecular movement without the need of a microscope or other lab equipment.

This video explains what happens when a model cell (egg) is in a hypotonic solution (which forces water into the cell) and a hypertonic solution (which draws water out of the cell).

There are examples of diffusion all around us. Dried fruits and beans swell when they are cooked. Grocery stores spray produce with water to keep them plump. Winter salting dries roadside plants. Substances move across cell membranes within our bodies! Diffusion is how plants absorb (and lose) water and how they exchange gasses. It is the method by which mushrooms suddenly appear after rain.

This educational topic, along with Backyard Science and Cross-Curricular Content can be found at: https://www.teacherspayteachers.com/s...
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