Pew has a science quiz (to go with it's jillion other quizzes) that allows you to test your knowledge against the test itself and see how you stack up with others.
By the way, I got 12 of 13 right. Fear me.
Don't cheat, but here's the report based on a random sample. Scroll down and you'll find different ways they break down the results (gender, education, etc.). There are also questions asking people where they think the kids in the U.S. stand in terms of science knowledge. Interestingly, more get that wrong (44 percent say we're at the bottom in the world) than right (35 percent who said we're in the middle). An overly optimistic 7 percent thinks we're "top."