Diffusion

The passive movement of molecules or particles along a concentration gradient, or from regions of higher to regions of lower concentration.

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It took approximately 1 hour for the colours in the beakers 1, 3 and 5 to diffuse into beakers 2 and 4. The Red and yellow turning orange and the yellow and blue turning green.

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The diffusion of the colour pigments on smarties in water takes about 1 minute

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