If you saw my post yesterday about the layered liquids experiment then you know I found it in a book we got recently. Well on the opposite page was the bobbing bouncing raisin (or as I’ve seen it called elsewhere the dancing raisin) experiment and just so happens we had a container of raisins handy.
First we started off with this small spice container and 7-Up but not much luck. I figured we needed more soda and more fizz.
Unfortunately our only bigger glass wasn’t totally clear but we still had fun watching what happened. I wasn’t sure what to really expect and dropping the raisins in was like dropping those alka-seltzer tablets into water. Instant fizz.
And then the cool reaction started as the raisins which had sank to the bottom slowly started getting covered in bubbles and next thing you know they were rising to the top and then falling back down. The book we were using explained how the bubbles stick onto the raisin so when they rise they take the raisin with them and as the bubbles pop at the top the raisin sinks again.
Soon the experiment turned into a game of whether or not my daughter could catch the raisin before it sank back down. It was surprisingly hard to do it since as she stuck her fingers in the bubbles would pop and the raisins sank like a rock. That kept my daughter amused for awhile until the soda started to lose its carbonation.
This is the book we used and you can purchase it through my store if interested.