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Comparing obesity among different racesFeatured science projectScience project video


This science fair project was conducted to find out the relation between obesity and race. The science fair project involved comparing the Body Mass Index (BMI) African-Americans and Caucasians.


There is a higher percentage of obese African-Americans students than Caucasian students, within the age band of 15 to 18 years..

Scientific Terms

Hypertension, heart disease, diabetes, BMI



Obesity happens when a person has so much fat in his body that his health is affected and his life expectancy is reduced. Among the health problems associated with obesity are hypertension, heart disease, diabetes and difficulty in breathing.

One of the simplest ways to determine if a person is obese is to calculate the Body Mass Index (BMI).

BMI = [weight (kg)]/ [height (m) x height (m)]

BMI less than 18.5 – underweight

BMI between 18.6 until 24.9 – normal

BMI between 24.9 until 29.9 – overweight

BMI more than 30.0 – obese

Obesity happens due to excessive consumption of food and too little exercise. Sometimes it can also be due to genetic factors or even a very low metabolic rate. This is the reason why sometimes people put on weight despite eating small amounts of food. Other reasons include eating too much, physical inactivity, eating out too often and excessive consumption of sweetened drinks/junkfood.

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Time required:
1 hour to prepare, 2 days for the science project experiment
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Easily found
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Basis safety requirements