Floating & Sinking Mystery

I have had a Density Paradox set for quite a while, but never have used it. This past week I decided to try it out. I might use this as a scientific investigation inquiry lab. Students can observe the first part of the first video and then they can hypothesize what caused the results and then propose ways of testing their hypotheses. Watch the video and then click on the solution tab at the end to see the solution.