Because the thin skin isn't entirely air tight. A little bit of air is constantly leaking straight through.
the temperature affects the balloon filled with air because if it is too cold it can freeze it, and cause the balloon to pop
Helium is less dense than air, which is why the helium-filled balloon floats when you let it go.
The air particles in the balloon compress due to the cold atmosphere in the refrigerator which causes the balloon to be smaller.
yes
A balloon filled with helium floats and a balloon filled with regular air falls to the ground because helium has less density than air so the air causes the balloon to sink because there are more molecules in it. The helium has less molecules in it so the balloon rises.
It is filled with heated air. Since air is mostly nitrogen, a hot air balloon is mostly filled with nitrogen.
no its filled with hot air from a fire that is lit underneath the balloon.
the temperature affects the balloon filled with air because if it is too cold it can freeze it, and cause the balloon to pop
Helium is less dense than air, which is why the helium-filled balloon floats when you let it go.
air
No it decreases
Putting an air-filled balloon in a refrigerator will cause it to shrink.
A water balloon is filled with water, and other balloons are filled with air or helium.
The balloon expands.
No. Helium is lighter than air
Balloon rubber is very thin and not completely "airtight" so gasses will leak from the balloon. This is even more apparent if the gas in the balloon is Helium or some other gas with smaller molecules than those of air.
A typical hot air balloon is filled with the same air we breath.