Dancing Raisins in Ms. Kinnane’s Class. April 26, 2018-Junior Infants-, ScienceSt. Kevin's We put raisins into 1. a glass of 7up and 2. a glass of water. We waited… Still waiting… The raisins in the glass of 7up started to float to the top. Reason: the raisin stick to the bubbles of gas and are carried to the surface. The bubbles pop and the raisin sinks again. The raisins in the glass of water didn’t rise because there is no gas to carry them to the surface.