What is diffusion?
Diffusion is the movement of particles from an area of high concentration to low concentration (down a concentration gradient). This occurs because the particles move randomly, and eventually end up evenly spread through the area.
NH
Related Biology GCSE answers
All answers ▸What are the products of respiration?
Where is water absorbed in the digestive system? - Duodenum, Ileum or colon?
Why does the rate of an enzyme reaction not just always increase with temperature? Why does it fall after a point?
Why is the human heart system described as double circulatory?