- (A) is true, (B) is true, (C) is true only for a given location but not for the whole Earth. I suspect that (C) was intended for a given location - so that would make (D) the right answer.
- (B)
- Summer. The seasons in the southern hemisphere are the opposite of those in the northern hemisphere. Yes, Christmas occurs in the summer down under!
- Winter - Oops, I meant summer!
Philip P.
tutor
C is true at any and every single point on Earth; less energy hits that point in winter than in summer. However, if you consider the Earth as a whole, its cross section doesn't change, so the total amount of energy hitting the entire Earth stays constant
(to a first approximation). Hence for every point in the northern hemisphere receiving less energy in winter, there is a corresponding point in the southern hemisphere receiving more energy; so it balances out. I'm probably over analyzing it, which is why
I decided the question must have been referring any location vice the whole Earth, which is why (D) is the answer. ;-)
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03/04/14
Steve S.
I think it's good to point out that an answer depends on context. And so there often are many answers and no one right answer.
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03/04/14
Steve S.
03/03/14