It can range from the stratosphere to the mesosphere, then they will be consumed by pressure and pop
As a balloon rises in the air, the volume or size of the balloon increases. This is because the atmospheric pressure decreases as the balloon gains altitude, causing the air inside the balloon to expand and the balloon to inflate.
It will usually burst. As it gets higher, outside air pressure is less, helium in balloon expands until balloon pops.
The pilot blacks out and dies, then comes back as a zombie
As a balloon rises, the pressure inside the balloon decreases. This is because the atmospheric pressure outside the balloon decreases with altitude, causing the balloon to expand as the pressure inside remains relatively constant.
A combination of heat from the sun and the lower pressure of the surrounding air the higher you go, causes the gas in the balloon to expand. Along with the sunlight weakening the balloon material, it will burst.
air is heavier than balloon, air rises
The pressure outside the balloon doesn't change when the balloon rises. By a balloon rising, I assume that air is being placed into the balloon. As the balloon fills with air, the pressure inside the balloon will increase. Since the balloon can stretch, the increasing pressure against its inner walls will cause it to rise, or more correctly put, expand. Eventually, the balloon will be stretched to its fullest capacity if more air is placed inside it. When it pops, the bang you hear is the high pressure of the atmosphere inside the balloon equalizing with the lower pressure of the atmosphere outside the balloon.
air is heavier than balloon, air rises
A hot air balloon typically rises to an altitude of around 1,000 to 3,000 feet above the ground, depending on weather conditions and the specific flight plan. Balloons can go higher, but most recreational flights stay within this range for safety and visibility reasons.
The air density inside a balloon changes as it rises because the hot air inside the hot air balloon is less dense than the air around it causing it to fly since hot air rises. But as it rises it loses its hot air causing it to eventually not be able to fly anymore and come down.
A hot air balloon rises due to the principle of buoyancy. As the air inside the balloon is heated, it becomes less dense than the surrounding air, causing the balloon to float upwards. This effect is similar to how a helium balloon rises in the atmosphere.
Heat rises of it makes the ballon rises