How does air spread?

Air spreads through a process called diffusion. Diffusion is the movement of molecules from an area of high concentration to an area of low concentration. In the case of air, molecules move from areas of high pressure to areas of low pressure.

Diffusion is a passive process, meaning that it does not require any energy input. It occurs simply because molecules are in constant motion and will naturally move from an area where they are more concentrated to an area where they are less concentrated.

The rate of diffusion is affected by a number of factors, including the temperature, pressure, and density of the air. Diffusion occurs more quickly at higher temperatures and lower pressures. It also occurs more quickly in less dense air.

Diffusion is important for a number of reasons. It allows us to breathe, as oxygen molecules diffuse from the air into our lungs. It also allows us to smell, as odor molecules diffuse from the air into our noses. Diffusion is also important for the exchange of gases between plants and the environment.