Which region of the sun's electromagnetic spectrum is most responsible for human skin cancer?
A) infrared
B) ultraviolet
C) visible
D) near infrared
B
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Which country emits the most per capita CO2?
A. U.S. B. China C. India D. European Union
Why are diamonds so hard?
A) They are formed under very cold conditions. B) They are held together by strong metallic bonds. C) They are held together by strong ionic bonds. D) They are held together by strong covalent bonds.
Under which of the following conditions would you expect the highest solubility of oxygen gas in water?
A. low temperature and high O2 pressure above the solution B. high temperature and high O2 pressure above the solution C. low temperature and low O2 pressure above the solution D. high temperature and low O2 pressure above the solution E. The O2 solubility is independent of temperature and pressure.
The largest mountains on continents are formed by ____ deformation
A)tensional B)shear stress C)strike-dip D)compression-induced E)extension-induced