Question

define diffusion in science

Answer 1

Diffusion is when particles or objects move from an area of higher concentration to an area of lower concentration. Concentration refers to how much of a particular object or particle is in a given space. So in the example of the transit train, you went from an area of higher concentration of people to an area of a lower concentration of people. This means that you went through the process of diffusion.

Answer 2

When the gas move towards lower concencentration from higher concentration in air.The process is called diffusion