Hot air rises
Hot air rises and cold air falls.
If there is warm air in the balloon, cooler air makes the balloon rise and if there is cold air in the balloon warmer air makes the balloon fall.
No Gas Just hot air which is why it is called a hot air balloon. If you were wondering hot air is lighter than cold air which makes it rise so when it is trapped inside the balloon the whole thing will rise.
yes
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).
Hot air rises and cold air falls.
Hot air rises in the atmosphere because it is less dense than cold air, creating a buoyant force that causes it to move upward.
Hot-air balloons can rise up into the air because hot air is lighter, allowing it to float up into the sky.
If there is warm air in the balloon, cooler air makes the balloon rise and if there is cold air in the balloon warmer air makes the balloon fall.
Hot air
Updrafts are systems of hot air, which rise. Birds and expert hot-air ballooners use them. Downdrafts are systems of cold air that tend to fall and bring things flying in it with them.
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.
Hot air rises. As air is heated, it becomes less dense and therefore more buoyant, causing it to rise. This is due to a difference in temperature creating a temperature gradient, leading to the movement of air.
i
Convection
Hot air rises because it is less dense than cold air.
Convection is the type of heat transfer that causes hot air to rise and cold air to fall. This is because warmer air is less dense and tends to move upwards, while colder, denser air sinks. Radiation and conduction do not directly cause this vertical movement of air.