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Fill a small balloon with water and ease it into place.
The shape and size of a balloon change when filled with air or water because the molecules of the substance fill the balloon and exert pressure on its walls. This pressure causes the balloon to expand and take on the shape of its contents. The volume of the balloon increases as more air or water is added, changing its size accordingly.
I personally fill a balloon with my breath, the balloons I buy are already filled with helium.
Filling a balloon with pure oxygen can be dangerous as oxygen accelerates combustion. It can create a highly flammable environment, increasing the risk of fire or explosion. It is not recommended to fill balloons with pure oxygen.
Stretch the mouth of the deflated water balloon over a tap or other pressurized water source. Turn on the tap so that water rushes into the balloon. Once filled, twist the balloon at the neck a few times. This way water does not escape when you remove the mouth of the balloon from the tap. Once removed, tie the twisted neck of the balloon in a knot to prevent water from escaping.
A balloon or a tire can both be filled with air.
Balloons are filled with gas (such as helium), or a mixture of gasses (such as air) or hot gasses (such as hot air).Helium.
I would say an air filled balloon if you fill it with just plain air. I am basing this on the principle of osmosis and diffusion. A substance such as a gas will travel from an area of increased concentration, such as a balloon filled with helium, to an area od decreased concentration, such as the room the balloon is in. If you fill the balloon with air identicle to that in the surrounding room it negates diffusion.
When you fill a balloon with steam and put it in the refrigerator, the steam will condense back into water droplets, causing the balloon to shrink as the gas inside loses volume. The cooling of the gas molecules in the balloon will also decrease their kinetic energy, leading to a decrease in pressure inside the balloon.
When you fill a balloon with air, the air molecules displace the surrounding space inside the balloon, causing the balloon to expand and stretch. The pressure of the air inside the balloon exceeds the pressure outside, creating tension in the balloon material, which keeps it inflated.
The air in the balloon will have a difficult time expanding to fill the bottle because the bottle is already filled with air at atmospheric pressure, which creates resistance. The pressure inside the balloon needs to overcome the pressure inside the bottle in order for the balloon to expand and fill the bottle.
A typical hot air balloon is filled with the same air we breath.