Time: 15 minutes
Equipment: glass jar with lid (or snug dish); hot water; aerosol spray (hairspray); ice cubes
Purpose/Topic: Weather—Clouds
AoPG: Intellectual

Pour about 1/3 of a cup of boiling water in the jar. Quickly spray the hairspray into the jar, and put the lid on. Place some ice on the lid, and watch the cloud form.