A balloon is made from an elastic material, such as rubber. As air is forced into the balloon, the air pressure inside the balloon increases. This will force the balloon to expand.
A balloon is made from an elastic material, such as rubber. As air is forced into the balloon, the air pressure inside the balloon increases. This will force the balloon to expand.
A balloon is made from an elastic material, such as rubber. As air is forced into the balloon, the air pressure inside the balloon increases. This will force the balloon to expand.