Dancing Raisins

Equipment

A jar glass of water, a fizzy drink e.g. 7up or fizzy water and the main thing, a hand full of raisins.

Information

The raisins are heavier than the drink so they sink to the bottom of the drink. In the fizzy drink though, they collect bubbles at the bottom of the jar, and these bubbles help the raisins dance up the jar to the surface. With the bubbles of carbon dioxide, the raisins are ligther than the drink so they rise to the top.

Experiment

Drop a handful of raisins into glass.

Drop a handful of raisins into 7up.

After a while the raisins will rise to the surface.

What I noticed

I noticed that the raisins went to the surface of the fizzy drink but when they got there the bubbles burst and the raisins went back down. Also, after a while the fizz went flat and the raisins did not go as fast as they did at the start.

By Luke.