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Comparing obesity among different racesFeatured science projectScience project video


The materials required for this science fair project:
- 50 African-American boys aged between 15  and 18 years old
- 50 African-American girls aged between 15  and 18 years old
- 50 Caucasian boys aged between 15  and 18 years old
- 50 Caucasian girls aged between 15  and 18 years old
(for more reliable results, ensure that the participants live in the same city and attend the same school)
- A measuring tape
- A flat wall
- A weighing machine
- 1 roll of masking tape


1. For this science fair project, the independent variable is the racial type of the participating students – African-American or Caucasian. The dependent variable is  the BMI of the participant. This is determined by measuring each participant’s height and the weight to calculate his/her BMI. The constants (control variables) are the age of the participant and the number of participants for each group.

2. The measuring tape is fixed on the wall  with masking tape. The weighing machine is also placed close by  so that the weight of the participant can be  recorded immediately after checking the height.

3. The participants are separated into 4 groups as follows :

a. 50 African-American boys

b. 50 African-American girls

c. 50 Caucasian boys

d. 50 Caucasian girls

4. The height of each participant  is  measured in meters and their weight is measured in kilograms. Using the formulae provided above, the participants’ BMI is calculated.  The BMI value  will indicate  whether the participant is obese.

5. The number of obese participants  in each group is counted and recorded  in the table given below. The percentage of the obese persons  in each group is calculated and recorded in the table below.

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Complexity level:
Project cost ($):
Time required:
1 hour to prepare, 2 days for the science project experiment
Material availability:
Easily found
Safety concerns:

Basis safety requirements