氣球升上天後會點

No, it is just the opposite.

The higher the balloon goes, the lower is the air pressure. The pressure inside the balloon is thus greater than the outside pressure. The ballon will expand in volume.

The higher the balloon flies, the larger its volume becomes, until a state is reached that the volume is so great so as blow up the balloon.

因地方愈高，溫度愈低，因而形成高氣壓。氣球升得愈高，外在0既氣球就愈大。氣球會受唔住氣壓而爆