I didn't do much better: 78% . I got some of the astronomy questions wrong (re. the solar system). It was fun, though..although painfully slow to get through the way it was designed. Some boredom set in...
I got 3 wrong, but the test said I had them all right... till I got to the end, when it told me I had 0 correct, 50 wrong. Maybe it would count better if I had let it set a cookie or two?
It is also one of the worst online quizzes I've ever done. Was there really any need for two pages per question? One page with all the questions, followed by one with the scores and the answers would have been far simpler.
I'm scientifically minded enough to know that you don't have to force two page refreshes on me for every question. 2/2 right.. extrapolation says I'd get 100% plus my time to do better things than wait for page loads.