Page 20 - 新思维科学学生用书8 样章

1.3 Breathing

Continued

6 If you have time, repeat steps 2 – 5 two more times. Use your three results to
calculate a mean value for the volume of air you can breathe out of your lungs.

7 Replace the tubing with another piece of clean tubing. Now another person
in your group can try the experiment.
8 Record all of your results in a table.

Questions
1 Share your results with the rest of the class. Can you see any patterns in the
results? For example:
• Do you think that the volume of air a person can breathe out is related to

their size?
• If there is anyone in your class who plays a wind instrument, does this seem
to have an effect on how much air they can breathe out?
2 Plan an experiment to investigate this hypothesis:

People who play the trombone can breathe out more air in one breath than

people who play the violin.

Activity 1.3.1

What happens when you breathe in?
Sit quietly for a moment. Shut your eyes and think about your breathing.

Put a hand just underneath your ribs. Take a deep breath in. You may be able to
feel your ribs moving upwards. You might also be able to feel something moving
inwards as you breathe.

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