What is one of the key reasons that diffusion occurs faster over shorter distances?

Diffusion is a process where particles move from an area of higher concentration to an area of lower concentration. One key reason that diffusion occurs faster over shorter distances is that it reduces the time taken for particles to move from one point to another. When the distance is shorter, particles have less space to cover, which means they reach their destination more quickly. The efficiency of diffusion is significantly influenced by the distance involved; thus, shorter distances lead to a faster process.

This principle is evident in many biological systems, such as the exchange of oxygen and carbon dioxide in the lungs and across cell membranes, where the thin barrier allows for rapid diffusion due to the minimal distance involved.