This is a worksheet that goes along with our Dancing Raisins science experiment (discrepant event). Made for a 1st grade ESOL group, but could be used with any young elementary class. Here's the experiment:
"To do this experiment, you need ginger ale (or another clear-ish soda), raisins, and a tall clear container. Pour the ginger ale into the container and ask the kids for their hypothesis. Do they think the raisins will sink or float? When you drop the raisins in, they will sink at first, but then the bubbles will attach to the wrinkles, which makes them float back up to the top. Once they reach the top, the bubbles burst, and the cycle happens all over again. It will keep going for quite a while-as long as the drink is still slightly fizzy."