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AQA · GCSE · Biology · Higher

Meaning of the term diffusion

Q02.1 2 marks

What is meant by the term diffusion?

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Marking points

  1. 1 Movement or spreading out of molecules/particles or named substances/chemicals/gases/liquids.
  2. 2 From an area of higher concentration to an area of lower concentration; allow down/with the concentration gradient.

Full-mark answer

Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration.