You may be aware that your hair says a lot about you. Your hairstyle is used to express your personality, your hair color can hint to your ethnic background and the length and texture can also allude to your gender. However, did you know that your hair can also tell scientists where you live?
A recent study that involved hair samples taken from 65 cities revealed that the composition of a person’s hair was related to the certain chemical ratios found in their home town. It is a known fact that water molecules separate into hydrogen isotopes and oxygen isotopes as they accumulate in your hair. Researchers studying this phenomenon have found that the concentrations of these isotopes and their ratio to one another are similar to the concentrations and ratios found in the water supply of the area where a person lives.
Right now this discovery is being applied to forensic science. Hair samples can now be used to link certain people to crime scenes or to help track down criminals.
If you are looking for a unique biology science fair projects then consider elaborating on this discovery. Hair is a great material to experiment with because it is easy to collect, it is free and collecting the hair doesn’t hurt the person the hair is harvested from. Possible school science fair projects you can conduct with hair include:
The possibilities are limitless. Return to this science blog each Friday for more science fair project suggestions.