BOUNCING BUGS

BOUNCING BUGS

A cup full of bouncing "bugs"? It sure looks like it. Drop a few raisin pieces in a clear plastic cup and watch them bounce and bob up and down.

You will need:

3-4 Raisins

Plastic Knife

Plastic clear cup

Any clear soda or carbonated water

Carefully cut the raisins into 3 or 4 pieces. Put them into the bottom of the plastic cup. Pour carbonated soda or water into the cup. Watch the raisins bounce and bob up and down in the cup. 

How does it work?

The soda has carbon dioxide bubbles in it. These bubbles are lighter than the soda and so they float to the top. The raisin is denser than the soda so it sinks to the bottom but the bubbles combine with the raisins and they eventually become less dense than the soda and float to the top. The bubbles are released into the air and then the raisin drops back to the bottom again.