The Great Lakes of North America were created by
A) cirque glaciers.
B) ice sheets that enlarged and deepened stream valleys to form the basins of the future lakes.
C) the deposition of ice in till plains.
D) isostatic subsidence of the crust.
B
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Everything else being equal, above which of the following surfaces does the lowest air temperature occur on a winter night?
A. surface covered with water B. surface covered with vegetation C. surface covered with snow D. bare surface
What is a mantle plume, and what causes one to erupt? What will be an ideal response?
Which of the following is true regarding carboxylic anhydrides and phosphoric anhydrides?
A) Both carboxylic anhydrides and phosphoric anhydrides have important biological functions. B) Neither carboxylic anhydrides nor phosphoric anhydrides have important biological functions. C) Carboxylic anhydrides are not important in biochemistry but phosphoric anhydrides are important in biochemistry. D) Phosphoric anhydrides are not important in biochemistry but carboxylic anhydrides are important in biochemistry.
Prehistoric earthquakes may be interpreted using faulted pond sediments. The amount of offset of sediment layers from one earthquake is proportional to the ________.
A. isostatic anomaly B. earthquake magnitude C. amount of time since the last major earthquake D. amount of radioactive material in the sediment