How many unpaired electrons are there in a nitrogen atom in its ground state?
A) 2
B) 3
C) 4
D) 5
B
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Partial melting of oceanic crust and silica-rich sediments of continental margins ____
A)yields magma richer in basalt than the source rock B)is a major cause of earthquakes C)causes off-gassing which increases global warming D)yields magma richer in silica than the source rock E)will form sedimentary rock
What were the various theories about the age of the Earth? How did these theories lead to advances in science and new discoveries?
Which of the following is NOT necessary for an aquifer to exist?
A) Hygroscopic water B) Porosity C) Zone of saturation D) Permeability
What spatial reorganization accompanied the rise of capitalism?
A) Suburbanization, as people moved from cities to suburbs B) Urbanization, as people moved from rural areas to cities C) Counter-urbanization, as governments encouraged people to move to undeveloped areas D) Establishment of growth-poles, where government established dispersed city centers E) Renewed emphasis on traditional village structure