What enables the organisms in the water to stay in the surface layer?
I have a question about biology: "What enables organisms in water to stay in the surface layer?"
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It is the surface tension on the water. This surface tension is the result of molecular forces in liquids which keep the surface as small as possible. The surface of a liquid is similar to a tensioned elastic film. Even a steel needle would swim on the surface and not fall below. But if you let only one drop of sink into the vessel, the needle would immediately drop. The surface tension is then cancelled.
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Thank you.