Sheilah,
I liked your quiz as it had a vairety of questions from throughout the article. The only suggestion I have would be to leave the essay questions answers blank for you to grade later. I must confess...I did not get a 100 on my first try! I did have the correct thoughts but not in the same words as you, so therefore I was graded as incorrect. As you know, students will be tenacious in their desire for all the points! Of course as this is a quiz that can be taken multiple times, students can see the correct response and take the quiz again. Which is what I did and I liked seeing my 100 :)
Anne