Wind Chill

Wind Chill

Air picks up heat as it moves over a surface. This effect is called wind-chill. A wind-chill scale compares the speed and temperature of wind to the relative temperature of cold but still air. Thus 10 degree air moving, might feel the same as 5 degree air that is not moving. [AM] {GC} {WW}
Scientists who work at the north and south poles wear several layers of clothing to help insulate their body against freezing temperatures and the wind. The clothes trap air which is warmed by the scientists' body heat, keeping them warm. [VH] {WC}