MATERIALS:
- A tank
- A tube
- A plastic bottle with capacity measures
- Water
INSTRUCTIONS:
- Fill the tank with water.
- Fill the bottle with water and put the tube in it.
- Put the bottle upside down in the tank.
- Fill your lungs and blow in the tube.
- Look at your lung capacity in the bottle.
WHY?
You fill your lungs as much as you can and when you blow through the tube, all this air goes into the bottle and expels the water in the bottle, it occupies its place.
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