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.
Ecosystems and Material Cycles
Pollution and Decay • Decomposition in Composting
Exchange and Transport in Animals
The Circulatory System • Blood Vessels
Exchange and Transport in Animals
Exchange Surfaces • Factors Affecting Diffusion
Exchange and Transport in Animals
Exchange Surfaces • Alveoli
Exchange and Transport in Animals
Exchange Surfaces • Transport Needs
Plant Structures and Functions
Plant Transport • Factors Affecting Water Uptake
Plant Structures and Functions
Plant Transport • Leaf Structure
Cells and Control
The Nervous System • Neurones and Synapses
Key Concepts in Biology
Food and Transport • Transport in Cells
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