During which of the following times does the North Pole receive no hours of sunlight?
A) Fall equinox
B) Winter solstice
C) Summer solstice
D) Spring equinox
Ans: B) Winter solstice
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1500 UTC Convert the following time from UTC to the indicated U.S. time zones:
Photochemical smog ____
A) only forms at night B) requires the presence of fog C) requires the presence of smoke D) requires ultraviolet radiation
The Durban Agreement of 2011 establishes which of the following?
A) holding signers of the Kyoto Protocol to the 2012 deadline B) continued exemption for developing countries such as China C) keeping the same emissions goals as Kyoto D) creating a fund to help less developed countries reach emission reduction goals E) encourage developing countries to use their forests for fuel
Complex networks of interconnected food chains are ____.
A. food webs B. food distribution interactions C. trophic levels D. pyramids of energy E. trophic chains