U of Illinois - Atmospheric Pressure Atmospheric Pressure: force exerted by the weight of the air Atmospheric Pressure air pressure Pressure the original the original Atmospheric pressure. the original Atmospheric Pressure Air Pressure Diagram http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/fw/prs/def.rxml University of Illinois "Atmospheric Pressure" Atmospheric Pressure: force exerted by the weight of the air Atmospheric pressure. the original