Create atmospheric conditions that 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.
Correlation to Next Generation Science Standards (NGSS)†
Science & Engineering Practices
Planning and carrying out investigations
Disciplinary Core Ideas
MS-ESS2.C: The Roles of Water in Earth’s Surface Processes MS-ESS2.D: Weather and Climate HS-ESS2.C: The Roles of Water in Earth’s Surface Processes
Cause and effect
MS-ESS2-5. Collect data to provide evidence for how the motions and complex interactions of air masses results in changes in weather conditions.