What is conditionally unstable air?
A. air that resists uplift
B. stable air that lifts and then becomes unstable
C. air that does not resist uplift
D. unstable air that lifts and then becomes stable
E. air following the environmental lapse rate
B
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The principal cause of desertification is:
A) warming global temperatures due to the burning of fossil fuels. B) inappropriate land use such as agricultural clearing and overgrazing. C) extended droughts in untouched rain forest climates. D) air pollution as rural areas become urbanized.
Doubling time refers to
A) the number of years it takes for food production to double in quantity. B) the number of years it takes for a population to double in size. C) the number of years it takes for a country's economy to double in value. D) the number of months it takes for a baby to double its birth weight. E) the number of weeks it takes for the Dow Jones Average to double.
Tilted retaining walls are a sign of a landscape undergoing creep
Indicate whether this statement is true or false.
Tornadoes can and do hit big cities. However, they are hit less often than other areas because big cities are less common in the central part of the United States and ________.
A. the heat island effect limits tornado development B. unusually good luck C. cities are often built in areas sheltered from tornadoes by geography D. cities are relatively small targets relative to the rest of the region E. the electromagnetic energy they emit creates a partially effective tornado shield