Earth Systems Chapter 5 Question and Answers

Earth Systems Chapter 5 Question and Answers - Earth...

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Earth Systems Chapter 5 Question and Answers The nature of atmospheric pressure (p.107) 1. What generally happens to atmospheric pressure with increasing altitude? The value of atm pressure drops with increasing altitude because the farther away you get from earth and its gravitational pull; the fewer gas molecules are present in the atmosphere. 2. Explain how atmospheric pressure is related to air density and air temp.? The pressure of a gas is proportional to its density and temp. The denser the gas, the greater the pressure it exerts. At lower altitudes, the gas molecules of the atmosphere are packed more densely together. Because the density is higher, there are more molecular collisions and therefore higher pressure at lower altitudes. If air is heated, the molecules become more agitated and their speed increases. This increase in speed produces a greater force to their collisions and results in higher pressure. Therefore an increase in the temp of a gas produces an increase in pressure. 3.
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Earth Systems Chapter 5 Question and Answers - Earth...

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