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Chapter 6 Answers to Review Questions

Chapter 6 Answers to Review Questions - Chapter 6 Answers...

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Chapter 6: Answers to Questions for Review 1. Because as altitude increases, there is always less air above you (because more of it is below you). 2. By changing the mass of the air in the column. 3. In the colder, denser air, the pressure decreases rapidly with height because you climb above large numbers of molecules as you increase your altitude. 4. 1013.25 mb or 29.92 in. Hg or 1013.25 hPa. 5. High. 7. An aneroid barometer houses a small, flexible metal box called an aneroid cell. Before the cell is tightly sealed, air is partially removed, so that small changes in external air pressure cause the cell to expand or contract. A mercury barometer consists of a long glass tube open at one end and closed at the other. Removing air from the tube and covering the open end, the lower portion of the tube is immersed into a dish of mercury. The column of mercury in the tube balances the weight of the air above the dish, and hence the height of the column is a measure of atmospheric pressure. 8. Station pressure is the atmospheric pressure at the elevation of the weather station. Sea-level pressure is the station pressure the weather station would have if the station were located at sea level. The two would be the same if the station were located at sea level. 9. Because Denver is at a much higher elevation than Chicago. 10. Lines on a weather map connecting points of equal pressure. 11. Warm air aloft is associated with high pressure; cold air aloft is associated with low pressure. 12. Newton’s first law of motion states that an object at rest will remain at rest and an object in
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