The question is not clear but i think it will be the same original size as it was initially.
Troposphere
stratosphere
To enable the gases inside the balloon to expand which they do when the balloon reaches high altitudes. At this point the balloon becomes much larger.
At a high altitude, water reaches its boiling point at a lower temperature because of a lower air pressure holding it in its liquid form.
The higher the altitude the colder it gets and as it leaves the troposphere (Where we are) it enters the mesosphere and it is about as -85 degrees
the air pressure outside of the balloon decreases.
Up, up, and away! A helium balloon rises rapidly until one of two things happens due to the falling air pressure with rising altitude: the balloon expands and pops and the remnants fall back to earth, or the balloon reaches an altitude where it can't rise further and the high altitude winds carry it off. Eventually if it has not popped the helium will slowly escape and it will fall back to earth. By the time it does fall back to earth it is usually hundreds to thousands of miles from where it was released.
Like a balloon.
Troposphere
Troposphere
stratosphere
first of all the transportation differ. a balloon travels by the gravity pull of oxygen while a rocket uses a combination of chemicals. the pressure builds up and there you go you have a rocket shooting off. then when it reaches a certain altitude it starts condensing in sizes while a balloon is incapable of doing that. It would just well...pop!
increasing altitude decreases air pressure, this pressure gradient with gravity decides if things sink or float. heating the air in the balloon decreases the weight of the balloon and allows the downward pressure from above plus the weight of the balloon to be less than the upward air pressure from below. hence the balloon rises due to this force imbalance. the balloon reaches a constant height when all three are equal
The bar-headed goose flys at the highest altitude and reaches the highest altitude of any animal.
To enable the gases inside the balloon to expand which they do when the balloon reaches high altitudes. At this point the balloon becomes much larger.
If you are talking about a balloon that is not tied then it shrinks because the air in it is being released. If you are talking about a balloon that is tied at its end then it will not shrink but expand since the outside pressure at altitude is lower than the inside pressure it was blown up at on the ground, causing it to expand.
It depends on the on what sphere of the atmosphere you are talking about. At ground level (troposhere) it gets colder as altitude rises. Once the altitude reaches the stratosphere the temperature becomes warmer then cools down again as it reaches the stratopause, and continues to decline as altitude increases in the mesophere until the mesopause. The temperature then rises significantly when the altitude is high enough to be considered the thermosphere.