EXTRA CREDIT: Last Chance for Winter Term!

Please watch only the first two videos (the one with the student sitting in the water tank, and the one with the hand holding the concrete cube). Watching the other videos will be a waste of time. Remember: you are allowed to take notes on a 3 x 5 index card and use it on the quiz. These two videos are excellent and are very likely to help you formulate a better understanding of density. You only need to watch the concrete cube video to the 8:10 mark. Good luck.