The other day, I noticed this Tweet from Jesse Walker:
Only 7% scored 100%? Wow. pewresearch.org/quiz/science-k…
— Jesse Walker (@notjessewalker) May 6, 2013
So I clicked on the link and took the science quiz from Pew, which turned out to be 13 rather easy multiple choice science questions. I got all of them right. I probably wouldn't have beaten myself up too much if I'd missed a couple; I'm kind of a history and lit guy. You won't find stacks of back issues of "Scientific American" at my house.
But these are easy questions. If most Americans struggle with them, they know rather little about the world they live in.