Because the gases filling the balloon are lighter than the surrounding air.
There are many chemicals found in a hot air balloon to make it rise. The main elements/chemicals are Helium and Hydrogen.
it can rise because of the helium and the gases help make it rise to the sky
A balloon filled with argon will sink because argon is denser than air. The density of a gas affects its buoyancy in the surrounding air; denser gases will sink while lighter gases will rise.
well basically if you dissolve any liquid in yeast and warm water gas will typically rise from the mixture and supposedly fill a balloon with gas...keep in mind I'm only in the 5th grade...
The balloon typically contains a gas, such as helium or hot air, that makes it float or rise in the air.ôme balloons are also filled with air or other lighter-than-air gases.
The fire warms up the air and the air becomes less dense. So the balloon traps the warm air and since less dense gases rise with denser gasses around it, the warm air rises taking the balloon with it.
You can use air instead of helium, but it will not rise. The reason helium balloons rise is because helium is lighter than air. I am sure other gases can be used also.
When you release a balloon, it will rise into the air because the gas inside the balloon is lighter than the air outside. As the balloon rises, it will expand due to the decrease in atmospheric pressure, until it eventually pops or deflates when it reaches a certain altitude.
One use of thermal expansion in gases is in hot air balloons. As the air inside the balloon is heated, it expands and becomes less dense than the surrounding - cooler air, causing the balloon to rise.
Hot air balloons fly because of the principle of buoyancy. When air inside the balloon is heated, it becomes less dense than the surrounding cooler air, causing the balloon to rise. The amount of lift generated depends on the temperature difference between the air inside the balloon and the air outside.
Helium. It is lighter than air and provides buoyancy, causing the balloon to rise.
The helium-filled balloon rises to a certain altitude in the atmosphere and floats because at that point, the buoyancy force (upward force) of the helium inside the balloon equals the gravitational force pulling the balloon downward, resulting in equilibrium. This balance of forces causes the balloon to stay at a stable altitude instead of rising further. Additionally, the surrounding air pressure and density decrease with altitude, affecting the balloon's ability to rise further.