MOST POPULAR VIDEOS

• 00:17 Missions Trip to San Antonio Jan 9 2014
  Uploaded Jan 16, 2014 by Penny Rivera to Middle School
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• 00:39 Dancing Raisins

  You'll see raisins bobbing up and down in the soda. Why does this happen? Raisins are denser than the liquid in the soda, so at first, they sink to the bottom of the glass. The carbonated soda releases carbon dioxide bubbles. When these bubbles stick to the rough surface of a raisin, the raisin is lifted because of the increase in buoyancy. When the raisin reaches the surface, the bubbles pop, and the carbon dioxide gas escapes into the air. This causes the raisin to lose buoyancy and sink. Then the process happens over and over again until the soda loose its carbon dioxide gases.

  Uploaded Aug 23, 2015 by Suzanne Milford