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thumb|right| Some particles are Dissolution (chemistry)|dissolved in a glass of water. At first, the particles are all near one top corner of the glass. If the particles randomly move around ("diffuse") in the water, they eventually become distributed randomly and uniformly from an area of high concentration to an area of low, and organized (diffusion continues, but with no net [[flux).]] thumb|Time lapse video of diffusion a dye dissolved in water into a gel.

AI overview

Diffusion is the process where particles randomly move around and gradually spread out from areas where they're concentrated to areas where they're sparse, until they're distributed evenly throughout. This matters because it's a fundamental way that substances mix and spread in liquids and other materials, happening naturally without any external force pushing them along.

AI-generated from the Wikipedia summary — may contain errors.