The weight of air on a unit area of the earth:

1. weight pressure
2. air pressure
3. unit pressure
4. area pressure

The force per unit area exerted against a surface by the weight of the air above that surface:

1. Force Pressure
2. Area Pressure
3. Air Pressure
4. Atmospheric Pressure

Tha average atmospheric pressure at sea level:

1. 1014.5 mb
2. 1015.2 mb
3. 1013.25 mb
4. 1017.75 mb

The decrease in the pressure per unit distance in the direction in which the pressure decreases most rapidly.

1. Pressure Gradient
2. Distance Pressure
3. Decreased Pressure
4. Unit/Distance Gradient