What Is a
A difference in concentration of molecules in physical space is called a concentration gradient. An easy to understand example from everyday life is the application and subsequent fading of perfume or aftershave scent.
Article Summary: What is a concentration gradient and how does it provide energy for the movement of molecules? Here's a simple explanation.
What Is a Concentration Gradient?
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Everyday Examples of Concentration Gradient
The concentration of scent molecules is highest on areas of the skin that have had perfume or aftershave directly applied. Others can smell the scent because some of those molecules are always traveling away from the perfumed person, the source, out into the air—moving down the concentration gradient, from a high concentration to a lower concentration. Eventually the scent molecules are so widely dispersed that they can no longer be detected.