Fick's Laws describe how substances move from areas of high concentration to low concentration, a process known as diffusion. The first law states that the rate of diffusion is proportional to the concentration gradient, meaning that the steeper the gradient, the faster the diffusion occurs. The second law predicts how diffusion causes the concentration of a substance to change over time. It shows that the rate of change in concentration at a point is related to the diffusion coefficient and the curvature of the concentration profile. Together, these laws help explain various natural processes, including gas exchange in lungs and nutrient transport in plants.