Key term for Edexcel GCSE Biology, used in Pollution and Decay.
The net movement of particles from an area of higher concentration to an area of lower concentration.
Diffusion appears in Edexcel GCSE Biology revision content for Ecosystems and Material Cycles, especially Pollution and Decay and Decomposition in Composting.
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Exchange and Transport in Animals
Exchange Surfaces • Factors Affecting Diffusion
