Press the bar of soap firmly against a plate moistened with water and turn it several times. Lift the soap up.

Press the bar of soap firmly against a plate moistened with water and turn it several times. Lift the soap up. Together with the soap, the plate rises. Explain why this happened.

Here we are talking about the interaction (mutual attraction) of molecules. The fact is that when two different bodies approach at a certain distance, the molecules of these bodies are mutually attracted.

Bringing the soap closer to a plate moistened with water, we brought these bodies closer at intervals approximately equal to the size of molecules. Bodies “stick together”, molecules are attracted to each other.