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	Project title	Examining the relationship between lung capacity and age
	Difficulty Level	Middle school
	Project page	Click here to view this science project
Description
The objective of this science fair project is to determine whether a person’s lung capacity is affected by his or her age. The experiment will involve male and female participants from five age groups.
Instructions preview
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 .....

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