This is a prime example of why, back in my high-school trivia team days, I learned to dread questions about science. The problem isn't so much that the writers

This is a prime example of why, back in my high-school trivia team days, I learned to dread questions about science. The problem isn't so much that the writers of trivia questions get the answers wrong (they do, but only very rarely). The problem is that they pose questions they think are simple, but they use real world examples ("an iceberg"), instead of the Platonic ideals they meant to use ("an ideal spherical iceberg composed of pure ice floating in a sea of pure water, neglecting evaporation, on a series of rainless days..." -- actually, come to think of it, it's pretty damn hard to construct the Platonic iceberg!) When answering a science trivia question you need to work hard to cut your train of thought off at the level of the "obvious" answer before you get too far down the line to computing the "more correct" answer.