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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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14y ago

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Why does a balloon need hot air?

A balloon needs hot air to make it rise because hot air is less dense than cold air. When the air inside the balloon is heated, it becomes lighter and causes the balloon to lift off the ground and float in the air.


How do you make a balloon rise into the air?

To make a balloon rise in the air, one way is to fill it with a lighter-than-air gas, such as helium or hydrogen. The gas inside the balloon is less dense than the surrounding air, enabling it to float and rise. The amount of gas and the size of the balloon will determine how high it can rise.


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.


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

He would heat it.


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

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


Why would a hot air balloon pilot heat the air in the balloon to make it rise?

Heating the air in the balloon makes it less dense than the surrounding air, causing the balloon to become buoyant and rise. As the air inside the balloon cools, it becomes denser and the balloon descends. This process allows the pilot to control the altitude of the balloon.


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.


Why did they call it the hot air balloon?

A hot air balloon is called an hot air balloon because, the inside is heated up to make it less dense, allowing it to rise. Meaning, your heating up the air inside the balloon, hence, the name: Hot air balloon.


Why does hot air balloon need fire so that it can fly?

A hot air balloon needs fire to heat the air inside the balloon. Heating the air makes it less dense than the surrounding air, causing the balloon to become buoyant and rise. The fire is used to maintain the temperature of the air inside the balloon to keep it flying.


Why would heating the gas in balloon make the balloon rise?

if you mean how the hot air in a hot air balloon makes it rise, its because hot air is less dense than cold air. when cold and hot air meet the cold air sinks thus making hot air left to rise.so when you put hot air in a balloon the air would rise. hope this helps.