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How Much Air Do Your Lungs Hold? Put the bowl in the sink and fill it about one third full of water. Fill the bottle to the top with water. Place your hand over the top of the bottle. Quickly turn the bottle upside down and put the top under the surface of the water in the bowl. Ask someone to hold the bottle steady and take your hand away. Fix a ruler to the side of the bottle with rubber bands or mark a scale on some paper and stick it onto the bottle. Put the tube in the neck of the bottle. Take a deep breath, hold your nose and blow hard down the tube. How much water can you blow out in one go? This will give you some idea how much air is in your lungs. |
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