What fixes the positions of the two tropics relative to the Equator?
ATilt of Earth's axis
BSpeed of rotation
CSize of the Moon
DDepth of oceans
Answer & Solution
Correct answer: A. Tilt of Earth's axis
1. The tropics are circles of latitude set by the Earth's tilt.
2. Their positions are dictated by the tilt of the rotation axis relative to the orbital plane.
3. Moon size and ocean depth play no role.
_Source: Wikipedia, Tropic of Cancer, Lead section_
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