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Hot air balloons use hot air because hot air rises above cold air. The air inside the balloon is heated above the temperature of the air outside the balloon. The warmer air trapped inside the balloon then causes the balloon to float above the outside colder air.

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Q: Why the hot air balloon needs hot air to make it rise?
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Related questions

Why does a balloon need hot air?

Hot air is less dense compared to cold air. The heated air in the balloon will rise, making the balloon float in the air.to make it rise.


How is a hot balloon lifted into the air?

to make a hot air balloon rise you use hot air


The air in hot air balloon is heated to make the balloon rise?

The volume of air increases on its heating hence the balloon rises on heating


What would heating the gas in an air balloon make the balloon rise?

Simple...hot air rises..


What chemicals from the periodic table make a hot air balloon rise?

There are many chemicals found in a hot air balloon to make it rise. The main elements/chemicals are Helium and Hydrogen.


How do you make a balloon rise into the air?

-- Inflate the balloon with some substance that is less dense than air. OR -- Inflate the balloon with air, then heat it after it is sealed.


How do you make air lighter so that it will cause a balloon to rise?

To make air lighter you would increase the heat inside the balloon, making it less dense, causing it to rise.


Would a hot air balloon pilot heat or cool the air in the balloon to make it rise?

He would heat it.


Why does heating the air in hot air balloon make it rise?

Hot air is lighter than cold air, so cold air sinks and hot air rises; that makes the hot air balloon rise (if the air around the hot air balloon is heated as well, it won't rise, or sink if in the air).


How does helium make a balloon rise when air doesn'?

Helium is lighter than air. So helium balloon rises in air.


Why can air balloon rise to the sky?

it can rise because of the helium and the gases help make it rise to the sky


How do convection currents make a hot air balloon to rise?

because the air becomes less dense and spreads out so becomes hotter and hot air rise so the balloon does.