http://eol.jsc.nasa.gov/quiz/quiz.pl?

There's no scoring, unless you keep track of your correct/incorrect choices.

I was doing quite well on it, and then it showed me something where the correct answer was "Great Salt Lake, USA, Wyoming", and it was showing desert, mountains, and a small river instead of a lake. Since the Great Salt Lake is in Utah, not Wyoming, and an earlier question had a nice picture of a corner of the GSL and correctly said Utah, I figured this one couldn't be right. So I selected something else and it counted me wrong.

They may have been showing something that was in Wyoming and it may have even been near the Great Salt Lake in the adjoining state of Utah, and it may even have bore a name that contained the words "great" "salt" and "lake" (though I doubt it). My point is, it's either terribly wrong or it was a mean trick question. I stopped playing.