We cannot see air, so how does it add weight to an inflated balloon? Class 8

We cannot see air, so how does it add weight to an inflated balloon? Class 8

We cannot see air, so how does it add weight to an inflated balloon? Class 8

Answer:

Air is made of tiny, invisible particles that have mass. When you inflate a balloon, you force more of these particles inside. The added mass of all those air particles makes the balloon heavier than it was before inflation.