Create atmospheric conditions which produce rain, fog, and clouds. By introducing smoke from a burning match and a little water vapor to the cloud-forming apparatus, you can create a dense cloud over and over again simply by squeezing and releasing the large rubber bulb. Under high pressure, air can hold a greater amount of water vapor than it can under less pressure. When the pressure is lowered suddenly, the excess vapor condenses and forms tiny droplets around each smoke particle.
Additional ResourcesNo Additional Resources at the time.
Flinn Catalog/Reference Manual Page 1083
Flinn Middle School Catalog/Reference Manual Page 698