Diffusion and Photosynthesis
In simple terms, it is the steady movement of particles from regions where there are many of them to regions where there are a few of them. It is a natural trend for things to spread out down a Concentration Gradient. See diagram below.
In scientific terms, DIFFUSION is the MOVEMENT OF PARTICLES from a region of HIGH CONCENTRATION to a region of LOW CONCENTRATION.
Diffusion is a passive process, it does not require any energy for it to happen.
|The easiest kind of diffusion is when different gases diffuse through each other. For example, it happens when a perfume smell spreads through out the air in an enclosed area. Likewise, diffusion of gases also take place in the leaves. See animation opposite.|