Needed: Bottle of Lemonade. Raisins.
Method: Drop 10-15 raisins into a galss of lemonade.
Watch the raisins. What are they doing?
THE SCIENCE QUESTION
WHY DO THE RAISINS RISE AND FALL IN THE GLASS?
THE SCIENCE ANSWER
The surface of the raisins are rough and tiny bubbles of carbon dioxide gas are attracted to it,
The density of each raisin is then reduced, making it lighter and causing it to move up the glass.