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Gender differences and lung capacityFeatured science projectScience project video

Procedure

Establish your hypothesis: For example - “Boys will have a (higher/lower) lung volume than girls.”

Groups 

Divide the participants into two groups: 10 males and 10 females. The individuals of these groups should be of approximately the same age and have no history of asthma, bronchitis, or other health problems.

Lung Volume

Tidal Volume (TV)

  1. To obtain the participant’s tidal volume, have the individual breath normally into a balloon.
  2. Have the participant pinch off the end of the balloon to prevent air from escaping. 
  3. Wrap the string around the balloon once in order to obtain the balloon’s circumference.
  4. Remove the string from around the balloon and lay the string out straight along the ruler to get the measurements of the string.
  5. Write down the measurement on a separate sheet of paper.
  6. Check the measurement against the “Lung Volume Conversion Table” to obtain the corresponding lung volume.
  7. Record the lung volume on the separate sheet of paper.
  8. Repeat these steps with the participant two more times.
  9. Find the average lung volume of each participant by adding the three lung volume amounts and dividing by three.
  10. Record the average tidal volume on the “Lung Volume” data sheet.
  11. Repeat these procedures with all participants.

lung capacity experiment

Expiratory Reserve Volume (ERV)

  1. To obtain the participant’s expiratory reserve volume, have the participant practice breathing in deeply and exhaling fully.
  2. When the participant is ready, have them take a normal breath in the balloon (you will not count this breath in the experiment) followed by taking a deep breath, then forcefully exhaling into the balloon.
  3. Have the participant pinch off the end of the balloon to prevent air from escaping. 
  4. Wrap the string around the balloon one time in order to obtain the balloon’s circumference.
  5. Remove the string from around the balloon and lay the string out straight along the ruler to get the measurements of the string.
  6. Write down the measurement on a separate sheet of paper.
  7. Check the measurement against the “Lung Volume Conversion Table” to get corresponding lung volume.
  8. Record the lung volume on a separate sheet of paper.
  9. Repeat these steps with the participant two more times.
  10. Find the average lung volume of each participant by adding the three lung volume amounts and dividing by three.
  11. Record the average tidal volume on the “Lung Volume” data sheet.
  12. Repeat these procedures with all participants.
  13. Determine if the results support your hypothesis.

 

Lung Volume Conversion Table

Balloon Diameter centimeters

Lung Volume Cubic centimeters

12

1,000

13

1,250

14

1,500

15

2,000

16

2,250

17

2,500

18

3,000

19

3,500

20

4,000

21

4,500

22

5,500

23

6,000

24

7,000


Lung Volume Data Sheet

Male

TV

ERV

Female

TV

ERV

Participant 1

   

Participant 1

   

Participant 2

   

Participant 2

   

Participant 3

   

Participant 3

   

Participant 4

   

Participant 4

   

Participant 5

   

Participant 5

   

Participant 6

   

Participant 6

   

Participant 7

   

Participant 7

   

Participant 8

   

Participant 8

   

Participant 9

   

Participant 9

   

Participant 10

   

Participant 10

   

 

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    Complexity level:
    4
    Project cost ($):
    10
    Time required:
    Material availability:
    Safety concerns: