Experiment 1: Bobbing Raisins
• Fresca or other clear carbonated soda
• Box of Raisins
3. Drop 4-6 of the raisins into the glass/jar.
-Gas bubbles attach to the wrinkles on the raisins.
-When the raisins are covered with the bubbles they become less dense than the drink, so they start to rise.
-The gas bubbles start bursting and then the raisins become denser than the drink, so they sink again.