More info about diffusion: http://windows.ivv.nasa.gov/glossary/diffusion.html
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diffusion characteristic of liquid
diffusion characteristic of gas
diffusion characteristic of solute
diffusion has example dye in water
diffusion has example aromatic molecules in air
diffusion has type osmosis
diffusion caused by Brownian motion
diffusion caused by concentration gradient
diffusion has definition movement of molecules
diffusion has definition from higher concentration
diffusion has definition to lower concentration
diffusion has definition of that molecule
diffusion type of basic process
