Examining the relationship between lung capacity and age
The materials required for this science fair project:
- 10 boys and 10 girls aged between 8 to 12 years old
- 10 boys and 10 girls aged between 13 to 20 years old
- 10 men and 10 women aged between 21 to 35 years old
- 10 men and 10 women aged between 36 to 50 years old
- 10 men and 10 women aged between 51 to 65 years old
- 100 balloons
- 2 wooden blocks
- 100 laundry clips
- 1 ruler
1. The independent variables in this science fair project are the gender and age group of the participants. The dependent variable is the size of the balloon blown, which is measured using a ruler. The constants (control variables) are the type of balloon used and the number of attempts.
2. Give each student aged between 8 to 12 a balloon. Instruct them to take a deep breath after stretching the balloon for a few times. Use a laundry clip to block each participant’s nose, and instruct them to blow the balloon using the air in their lungs, and hold the end of the balloon tightly after blowing to prevent the air from escaping.
3. Use a ruler and two wooden boxes to measure the diameter of the balloon. Allow each participant three attempts to blow the balloon, and record the size of the largest balloon that they are able to blow. Calculate the average maximum diameter of the balloons blown after all the ten participants in the same age group and gender have completed the task. Record the measurements in the table given below.
4. Repeat procedures 2 and 3 using the male and female participants from the four remaining age groups. Calculate the average maximum diameter of the balloon for each group and record it in the table given below.
Basic safety requirements