well even if i cannot answer all the questions from the show, i am still smarter than a 5th grader.
the questions target specific questions from 5th grade, so i probably have forgotten them. but i certainly do know more and also more complicated stuff from all aspects of science than a 5th grader. also by being older, you develop more complex thinking patterns, and are able to answer not only questions you learned, but achieve a high transfering ability which allows you to take a problem you know and transfer it on a new one you dont now, in order to find a solution