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    • Diffusion is where the particles spread out from an area of high concentration into an area of low concentration
    • Diffusion happens when different types of gases diffuse through each other.
    • It also happens in cell membranes.
    • This is where gas particles spread out
    • dissolved substances move in and out of cells using diffusion
      • The cell membranes help this as they let a lot of things in or out


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