Watch Interesting Scientific Facts About Colorful Balloons, How Do Some Balloons Float In The Air? Hot air balloons rely on buoyancy to float up into the air. Something is buoyant if it is less dense than the surrounding gas or liquid. When air is heated, it expands, becoming less dense than the air that is not heated. To help you answer them, we are right here with this HD video. Let your kids have fun and also learn through the cute 3D animation.
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