Which statement best describes how inflating a balloon is evidence of matter?
O It changes color and length.
o It changes mass and temperature.
o It changes size and shape.
O It changes texture and width.
One way to prove that air is made of matter is to blow up a balloon. Before you add air into the balloon, it is empty and shapeless. When you puff air into it, the balloon expands, so you know it is filled with something—air is taking up the space.
