No, Soccer balls contain oxygen and carbon dioxide. If they contained helium they would most likely float away.
Not if its regulation.
There is air inside a soccer ball.
soccer
Gas. A soccer ball is filled with gas under pressure.
the air inside of it
With concrete and wood
There is only air inside.
Two. The inside and the outside.
zero an inside and an outside!!
By using the inside of your foot or the outside...
Gas. A soccer ball is filled with gas under pressure.
Blow inside the ball through the hole!