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Usually only balloons that are filled with helium will float. Helium is a gas that is lighter than air, so causes the balloon to fly. Note that if you blow a balloon yourself, it will just float to the ground. There are also hot air balloons in which the air is heated by an on board heater. Hot air, being lighter than cold air, rises and lifts the balloon. When the air cools, unless it is reheated, the balloon descends.

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Related Questions

What source is used to fly hot air balloons?

Wind !... The balloons are filled with hot air, which causes them to rise. They are then at the mercy f the wind direction.


Why lighter than air balloons fly?

air balloons or hot air balloons fly because they fill with a very light type of air. The air is hot air.


Why does hot balloons fly?

The hot air inside the balloon expands, making the hot air balloon fly.


What did Montgolfier first fly?

Hot air balloons


What can you make fly?

You can't physicly fly, but you can ride in air planes and hot air balloons.


Where do hot air balloon fly form?

Hot air balloons can pick up and fly from just about anywhere. As long as the surface is flat a hot air balloon can fly from it.


Which force allows hot air balloons to fly?

Hot air balloons fly due to the principle of buoyancy. As the air inside the balloon heats up, it becomes less dense than the surrounding cooler air. This difference in density creates a lifting force that allows the balloon to float in the air.


How do hot air balloons use air to fly?

Hot air balloons use the fact that hot air rises as a way to make balloons fly. When the air inside the balloon is heated, it rises, and this creates lift which is used to make the balloon fly.


Is it possible for you to fly with balloons"?

Yes, it is possible to fly with balloons by using a hot air balloon or helium balloons, but flying with small party balloons is not feasible for human transportation.


Do hot air balloons fly or glide?

neither..... they float with the wind! :-)


What is the amount of people that can fly in a hot air balloon?

depends on how big the air balloons is


How do hot-air balloons fly?

Hot air balloons can fly because hot air rises. When the air inside the balloon gets hot, it rises above the cooler air around it, and it lifts the balloon and any cargo and passengers with it.