Cloud in the Soda Bottle
Experiment | Meet the Class | Transcript | Listen in RealAudio
1 two liter soda bottle
What to do:
Spray some water into the soda bottle so that there is a coating on the inside. Light match, blow it out, and throw it into the bottle. Seal the bottle and press firmly down on the bottle for about a minute and then let go. When a cloud forms open bottle and squeeze.
How it works:
The smoke from the match acts as a condensation nucleus. This means that the water inside the bottle will be able to cling to the particles to help form the cloud. By squeezing the bottle you compress the molecules on the inside and in turn heat up the inside temperature. By letting go of the bottle the temperature is allowed to go down and the water molecules appear as water vapor and a cloud forms.