Streamflow is fastest ____
A)at the bottom of the channel
B)at the surface of the water
C)along the sides of the channel
D)at the center of the channel, just below the surface
E)at the center of the channel, at the surface
D
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The dramatic increase in yields associated with the second agricultural revolution coincided with
A) a commercial market for food created by the growing urban labor force. B) the advent of communism and the emergence of communal farming systems. C) the arrival of crops (potatoes, tomatoes, peppers, chocolate) from the New World. D) the introduction of hybrid seeds and GMOs (genetically modified organisms). E) the large influx of migrants from peripheral to core countries.
Virtually the entire area of the Tibetan Plateau is higher than ________ feet above sea level.
A) 21,000 B) 24,000 C) 18,000 D) 12,000 E) 15,000
In which of the following conditions are chinook winds driest on the eastern side of the Rocky Mountains?
A. when the winds blow from the east B. when clouds form and precipitation falls on the upwind side of the mountains C. when the sun is shining D. when the air aloft is cold
The most prominent structure in the ancient city of Ur was the stepped temple called the ________, which was built about 4,000 years ago
A) pyramid B) Great Pyramid C) Ziggurat D) cathedral E) Parthenon