Biology - Diffusion

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Diffusion - The spreading out of particles from an area of high concentration to an area of low concentration.


  • In other words, diffusion is the gradual movement of particles from one area were there are lots of them to an area were there are fewer of them.
  • Diffusion occurs in both solutions and gases as the particles within these substances are free to move around (as they contain free electrons).
  • An example of diffusion could be when perfume is sprayed in a room. When it is sprayed, the particles within it start to diffuse through the


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