Biology / Bio 0144 · Atom · ~20 seconds
Cohesion and Adhesion
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Cohesion is water's tendency to stick to itself through hydrogen bonds; adhesion is its tendency to stick to other polar surfaces.
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A water strider's weight is held up by cohesion at the surface, while water climbing a thin glass tube shows adhesion.
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Cohesion holds water to water; adhesion holds water to another material — the same hydrogen bonding produces both.
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