Why Hot Air Balloons Rise?

Why Hot Air Balloons Rise? Hot air balloons rise because warm air is lighter than cold air. When the burner heats the air inside the balloon, the air molecules spread out. This makes the air inside less dense than the cooler air outside. Nature always pushes lighter air upward and heavier air downward. As the hot air becomes lighter, the cooler surrounding air pushes underneath it. That upward push creates lift, raising the balloon into the sky. When the burner is turned off, the air inside cools down, becomes heavier, and the balloon slowly descends. So a hot air balloon doesn’t float because of magic or engines it rises simply by controlling air temperature and density.