Question

how to write a short activity to show air is a matter?

Answer 1

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. You'll also notice that a balloon filled with air sinks to the ground. That's because compressed air is heavier than its surroundings, so the air has mass or weight.

Answer 2

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