Chapter 5, Responses to Review Questions ____________________________________________________________________________ 1. The air pressure at a given location on Earth's surface can be thought of as the weight per unit area of the column of air above that location. The pressure at any point within the atmosphere is equal to the weight per unit area of the atmosphere above that point. 2. Gravity compresses the atmosphere so that the greatest mass per unit volume is adjacent to Earth's surface. 3. Earth's atmosphere does not have a clearly defined top; rather, the atmosphere thins with increasing altitude and gradually merges with the gases of interplanetary space (hydrogen and helium). 4. Increasing the temperature reduces air density so that an air column exerts less pressure on the Earth's surface. 5. A mercury barometer consists of a partially evacuated glass tube sealed at one end and open at the other end. The glass tube is oriented vertically with the open end inserted into a small reservoir of mercury.
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This note was uploaded on 04/02/2009 for the course ESCI 1123 taught by Professor Edson during the Spring '09 term at Arkansas Monticello.