Which of the sites shown in this figure have decompression melting in an oceanic setting?
A. A
B. B
C. C
D. all of the locations shown
E. locations A and B only
Answer: E
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Which of the following is TRUE about Korean?
A) Written Korean has a letter for each sound. B) Korean is essentially Chinese spoke on the Korean peninsula. C) Korean uses two systems of phonetic symbols. D) The origin of Korean is unknown. E) Korean is written with the familiar Roman alphabet to simplify trade.
In a blast furnace, coke, which is solid carbon, reacts with O2(g) to form carbon monoxide. The carbon monoxide then reacts with Fe2O3(s) to produce solid iron and carbon dioxide. Which of the following is the balanced equation for the reaction of carbon monoxide with Fe2O3(s)?
A) 2 Fe2O3(s) + 3 CO(g) ? 2 Fe(s) + 3 CO2(g) B) 2 Fe2O3(s) + 2 CO(g) ? 4 Fe(s) + 2 CO2(g) C) 2 Fe2O3(s) + 3 CO(g) ? 4 Fe(s) + 3 CO2(g) D) Fe2O3(s) + 3 CO(g) ? 2 Fe(s) + 3 CO2(g)
The principal factors in the formation of photochemical smog are high concentrations of nitrogen oxides and
A. reduced precipitation. B. high levels of carbon monoxide. C. high relative humidity. D. strong sunlight.
Radiometric dating techniques allow geologists to place events in sequence without knowing
their exact ages. Indicate whether the statement is true or false.