The Incredible Bouncing Raisins Experiment
Grab a couple of easily accessible items from your pantry and let some raisins give you and your family an entertaining science lesson about density and buoyancy. Kids of all ages will be intrigued by the little show that the raisins will put on before their eyes as they watch this experiment unfold.
How To Do It
The raisins are much denser than the solution that they are in, therefore they fall to the bottom of the liquid. The vinegar and baking soda cause a reaction that releases carbon dioxide which adheres to the rough surface of the raisin which increases the buoyancy of the raisin and makes it rise to the top. When the raisins reach the top of the liquid, the carbon dioxide gas is released into the air and the raisin again sinks down to the bottom of the glass until more CO2 bubbles attach themselves again and make their way to the top.