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Learners assemble a hot-air balloon from tissue paper. The heated air (from a heat gun) inside the balloon is less dense than the surrounding air and causes the balloon to float.

In this activity, learners build a hot air balloon using just a few sheets of tissue paper and a hair dryer.

Learners observe and conduct experiments demonstrating the different properties of hot and cold materials.

In this activity, learners graph 48 hourly air temperatures from a local weather observation site and observe the diurnal temperature variations.