Hot Air Balloon - The Science Behind the Rise

Why does a hot air balloon rise? B. The weight of the balloon is less than the weight of the air displaced by the balloon.

Explanation:

Hot air balloons rise because of buoyancy (the force that cause objects to rise in the air). In order for the balloon to float, it needs to be lighter (less dense) than the surrounding air. By adding lighter hot air, it causes the balloon to have less weight than the air it displaces.

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