A standard pressure of 1013.25 millibars is also known as one atmosphere (1 ATM).(a) Look...

A standard pressure of 1013.25 millibars is also known as one atmosphere (1 ATM).

(a) Look at Fig. and determine at approximately what levels you would record a pressure of 0.5 ATM and 0.1 ATM.

FIGURE Atmospheric pressure decreases rapidly with height. Climbing to an altitude of only 5.5 km, where the pressure is 500 mb, would put you above one-half of the atmosphere’s molecules.

(b) The surface air pressure on the planet Mars is about 0.007 ATM. If you were standing on Mars, the surface air pressure would be equivalent to a pressure observed at approximately what altitude in Earth’s atmosphere?