Which of the following statements is true regarding high or low pressure for a parcel of air at the surface?
A. higher temperature, lower density, warmer air rises, higher pressure at surface
B. lower temperature, higher density, cold air rises, higher pressure at surface
C. higher temperature, higher density, warmer air rises, lower pressure at surface
D. lower temperature, higher density, cold air sinks, higher pressure at surface
Answer: D
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Which of the following terms refers to a dust or sandstorm that forms along the leading edge of a thunderstorm?
A. chinook B. foehn C. haboob D. bora
Based on the U.S. and European experience, as countries become more developed,
A. services replace manufacturing as the largest proportion of GNI. B. manufacturing replaces services as the largest proportion of GNI. C. agricultural output increases as a proportion of total GNI. D. retail and wholesale trade decreases.
What is true of water and water supplies associated with urban areas?
A. Water supplies typically have shallow wells. B. Flooding is extremely rare. C. Runoff is well-handled by storm sewer systems. D. Excess urban water irrigates many agricultural areas. E. Urban development often destroys or degrades wetlands.
Which of the following are produced when formic anhydride reacts with ethanol?
A) acetic acid and ethyl formate B) acetic acid and methyl formate C) formic acid and methyl formate D) formic acid and ethyl formate