The term 'Motion of Air' is often referred to as 'WIND'. WIND is the movement of air from an area of high pressure to an area of low pressure. WIND is created by differences in temperature, pressure, and humidity. WIND can be caused by natural phenomena such as storms, or it can be artificially created by machines such as WIND turbines. WIND is an important factor in weather patterns, and it can also be used to generate electricity.