Go to web site http://www.quia.com/cb/18754.html and follow the instructions. Take notes of the answers in the game; they are a great way to review for the quiz! Dr. Duruhan Badraslioglu Physics Dept. The Bullis School 10601 Falls Rd. Potomac, MD 20854 phone:(301) 983-5701 ext. 892 fax: (301) 634-3655