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Hot Air Balloons Are Cool. How They Work. Hot air balloons rise from earth because they are filled with air that is warmer than the air outside the balloon. Did you know that hot air balloons are so big that they can lift 1,000 pounds, they need 65,000 cubic feet of hot air.
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How They Work • Hot air balloons rise from earth because they are filled with air that is warmer than the air outside the balloon. • Did you know that hot air balloons are so big that they can lift 1,000 pounds, they need 65,000 cubic feet of hot air.
Traveling In A Hot Air Balloon • If you need to go somewhere a hot air balloon is not the right type of vehicle. You can’t steer it and it only goes the speed of the wind.