The Burping Bottle Experiment is sure to entertain young scientists. In fact, if you can freeze more than one bottle when you get started, go for it because of the simple fact that the kids are going to want to try this experiment more than once. This experiment explores air and water. When the air inside the bottle is cooled in the freezer, the molecules of air slow down and become more dense. When you pout the water over the dime, a better seal is created around the dime, so when the air molecules begin to warm up and move faster, the expand. As they expand, the air pressure builds inside of the bottle and pushes against the bottom of the dime so that it can escape, which causes the bottle to burp.
How To Do It