Properties of Air and Buoyancy

The video tutorial explains two fundamental properties of air: it has weight and it occupies space. Through simple experiments, the video demonstrates that air can cause a stick to tilt when a balloon is filled with it, proving that air has weight. Another experiment shows that a blown-up balloon cannot fit into a pencil box, illustrating that air occupies space.

What is one of the properties of air mentioned in the video?

• Air is visible

• Air has weight

• Air is solid

• Air is liquid

What happens to the stick when a balloon filled with air is hung back on it?

• The stick breaks

• The stick tilts towards the side of the balloon filled with air

• The stick tilts towards the side of the empty balloon

• The stick remains balanced

Why does the stick tilt towards the side of the balloon filled with air?

• Because the balloon is lighter

• Because the balloon is heavier

• Because the stick is broken

• Because the thread is loose

What happens when you try to close the pencil box with an inflated balloon inside?

• The box closes easily

• The box cannot be closed

• The balloon pops

• The box becomes heavier

What does the experiment with the pencil box and balloon demonstrate?

• Air is invisible

• Air has weight

• Air is a liquid

• Air occupies space