University Corporation for Atmospheric Research
Ucar: Clouds in the Air: Why Are They There?
An experiment that demonstrates why there are clouds in the sky. Start with air, invisible water vapor, particles we call condensation nuclei, and air pressure...the cloud comes later!
Exploratorium
Exploratorium: Science Snacks: Fog Chamber
Create a fog chamber by rapidly expanding air in a jar in this activity. This activity uses a match in a jar to bunch water into tiny droplets.