Cloud Formation
Cloud Formation is what happens when warm, moist air cools and tiny water drops appear in the sky.
When you take a cold glass out of the fridge, water drops form on the outside. Warm, wet air near the glass cools fast when it touches the cold surface. The water vapor in the air turns into tiny liquid drops you can see. Clouds form the same way — warm, wet air rises, cools, and tiny drops appear.
Explaining cloud formation by grade level
Warm wet air floats up high. Up there, the air gets cold. The water in the air turns into tiny drops. Those small drops bunch up and make a cloud.
Projects that explore cloud formation
Clouds form when warm, moist air cools and tiny water drops appear. In this experiment, hot water fills a bottle with warm, moist air. When an ice cube cools that air quickly, a small fog cloud forms inside the bottle.
Real clouds form when water vapor cools and condenses onto tiny particles in the air — and you can recreate that same process inside a glass jar. A small amount of water goes in first, then a lit match fills the jar with smoke particles. Quickly seal the top with a heavy-duty plastic bag. Push the bag into the jar and the air inside warms up, so the jar goes clear. Pull the bag out and the air cools. Water vapor condenses onto the smoke particles, and a cloud appears inside the jar.