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Project title Iron supplements and endurance Featured science projectScience project video
Difficulty Level High school
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This science fair project was done to investigate the effect of iron supplements consumption on the athletic performance of women with iron deficiencies. 

Instructions preview
1. For this science fair project, the independent variable is whether the participant is given the iron tablets, or not. The dependent variable is the time taken by the women to run 5 km on the treadmill. The time taken by the women to run the 5 km is measured with a stopwatch. The constants (control variables) are the age of the participants, the distance the participants have to run on the treadmill, the length of time they have been taking the supplement and the dosage of the supplements. 2. Twenty women athletes between ages 20 to 25 years .....
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