Which of the following is the smallest scale of atmospheric motion?
A. microscale
B. mesoscale
C. synoptic scale
D. macroscale
Answer: A
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Which of the following is NOT one of the eight most common elements in the Earth's crust?
a. potassium b. calcium c. aluminum d. carbon
Why might logging of a drainage basin change the slope of the river?
A) The base level of the stream is altered by the increased sediment load. B) The stream must steepen to accommodate the increased runoff. C) Increased sediment load causes the river to steepen its gradient to transport more sediment. D) Decreased erosion shuts off sediment supply, causing the river to erode.
The _____ bonds between water molecules lead to water's cohesion.
A) ionic B) radioactive C) methane D) hydrogen
When people in developing countries cannot produce enough food to eat, they commonly
A) start poaching. B) start raising drug-related crops. C) move to cities or emigrate. D) begin raising large herds of cattle.