A blonde girl in my class asked my teacher why we don't just build more oceans if global warming is a problem.
This one is funny, though: Today in Introduction to Physics, my teacher asked, "Now, here's a question to see how much you know about acceleration. What is the most well known form of acceleration?" (The answer is gravity). Now, I knew the answer, but my friend, sitting next to me, had the best fucking answer ever. Normally very quite, she shouts out, "The car from the Back to the Future movies!". Entire class could not stop laughing.