What is the origin of smooth troughs cutting across the landscape in the Great Lakes area?
A) The areas were covered by soft marine sediments.
B) A huge flood coming from Iowa flowed toward the Great Lakes.
C) Glaciers carved out the smooth troughs.
D) All of these are correct.
C) Glaciers carved out the smooth troughs.
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Before World War I, Southwestern Asia was ruled by
A. Britain B. The United States C. Russia D. The Ottoman Empire
Short waves
A) are comparable in size to Rossby waves. B) typically migrate upwind. C) are formed through temperature advection. D) always act to reduce local convergence.
The two changes of state that are the most important part of the water cycle for the atmosphere would be:
A) condensation, freezing. B) melting, freezing. C) evaporation, condensation. D) melting, sublimation. E) condensation, melting.
Birth rate would tend to decrease with a
A. Decrease in education B. Decrease in average marrying age C. Decrease in sanitation D. Decrease in infant mortality rate E. Decrease in affluence