Activity 01
Demonstration: Cloud in a Jar
Fill a large jar with hot water and a match head for smoke nuclei. Seal with lid and black paper for contrast. Use a bike pump to reduce pressure inside; students observe fog forming as air cools and condenses. Discuss temperature and pressure roles afterward.
Analyze the role of temperature and air pressure in cloud formation.
Facilitation TipDuring Cloud in a Jar, keep the ice fresh and the jar warm to ensure a strong temperature gradient for visible condensation.
What to look forStudents will complete a 'Cloud Formation Recipe' on an index card. They should list at least three 'ingredients' (conditions) needed for cloud formation and one 'result' (type of cloud or precipitation).