The most common component of the atmosphere is
A. particulates.
B. aerosols.
C. carbon dioxide.
D. nitrogen.
Answer: D
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From the following, the best example of a supranational organization is (are)
A) the Commonwealth of Independent States. B) NAFTA. C) the Canadian provinces. D) the United Nations. E) the European Union.
Varanasi is a city at the crossroads of geography and religion because it is the location of the:
A) sacred Ganges River B) library of Upanishads, the sacred Hindu writings C) place where the Mohammed ascended to heaven D) remains of St. Thomas
Earth's sky is blue during the day because:
A) red wavelengths are lost as solar radiation passes through the vacuum of space. B) the sun produces more blue wavelengths that it produces in any other color. C) the molecules in the atmosphere scatter blue wavelengths of light. D) the atmosphere absorbs blue wavelengths of light.
What is the modern explanation for what the ancient Chinese called "guest stars"?
A) They are meteorites. B) They are Nova or Supernova. C) They are planets. D) They are comets. E) None of the above.