Lung Capacity (Brilliant Biology Experiments)

You will need:

1. Plastic bottle (3 litres)
2. Deep plastic bowl
3. Measuring cup
4. Marker
5. Plastic tubing (12 inches long)
6. Scissors
7. Water

Find out through this simple experiment about
how the lung capacity of each person varies
depending on his age and gender.

INSTRUCTIONS

1. Create a spirometer by taking plastic bottle and pouring 60 ml of water into it.
2. Mark the level and repeat the process until the entire bottle is full and you have marked at 60 ml intervals. Leave the bottle full of water.
3. Fill a deep plastic bowl with 4 inches of water. There should be enough
   space in it for an additional rise in water level.
4. Next, ask an adult to cover the top of the bottle, quickly invert it and
   submerge it into the bowl of water so that no water may escape.
5. Ask a friend to hold it steady in the water. Take your plastic tubing and insert one end into the mouth of the inverted bottle.
6. When you are ready, exhale a large breath into the plastic tubing.
7. Calculate your lung capacity by measuring the number of markings by which the water has been displaced and multiply it by 60 ml.

RESULT

Each person’s lung capacity varies. Take a varied group of test subjects including girls and boys, and divide them on the basis of their heights, weights and ages.