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In this physics activity (page 6 of the PDF), learners will demonstrate air has weight by comparing an inflated balloon to a deflated one.

In this activity, learners with explore the gases present in air. They will then build their own wind cannons and challenge family and friends to a friendly competition.

What keeps bubbles and other things, like airplanes, floating or flying in the air?

In this physics activity, learners will explore buoyancy.