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-   -   10th grade biology science fair project (http://classroom.all-science-fair-projects.com/forum/showthread.php?t=755)

shaneyboo 11-30-2005 02:23 PM

10th grade biology science fair project
 
i really need a project deal with hair. it has to be something that i can do an experimient on thanks!!!!!!!!!!!1

satfire311 11-30-2005 04:22 PM

Hair oh Hair
 
You could see how chlorine affects different hair types.( Ex. Brown, wavy hair vs. Thick, strait red har)
Or you could see what shapoos and conditioners help/destroy different hair types.

brainygirl 11-30-2005 07:08 PM

This might help!!!
 
Measuring hair fiber strength under different conditions.

Hair takes on different properties depending on humidity and chemicals it has been exposed to. You might try looking at the strength of hair that has been treated in different ways. The basic system involves tying a strand or maybe several strands of hair to a stand. At the other end tie a hook that you can hang weights on. Put a ruler by the side of the hair fiber and add the weight gradually. As you gradually add the weight, you should see the hair fiber stretch before it breaks. By measuring the length of hair at different weights and plotting the results on a graph you should get a nice curve. By recording the amount of weight it takes to break the hair you can work out the hair strength.

To make things more interesting, take a few hair strands from someone who does not chemically treat their hair and some strands from someone who perms, bleaches, or permanently colors their hair. Ideally get and use the treated hair within 24 hours of treatment (try the local hair salon for volunteers). Compare the "stretchability" of treated and untreated hair and the overall strength. Treated hair should be weaker although if there is enough time between treatment and testing the hair will recover its strength.

Additionally, look at the properties of wet and dry hair. Hair immersed in water for an hour will swell by up to 20%. Ideally, heat the water to 50 degrees centigrade get maximum absorption into the hair. Test the strength of this wet hair versus "dry" hair (not strictly dry as all hair takes in water to some degree depending on air humidity). The wet hair should weaker by up to 30%. Hair strength in normal air humidity is somewhere between 1,000,000gm/cm square to 1,250,000gm/cm square - as strong as copper wire of similar diameter.


Good Luck!

monster1016 12-31-2005 05:47 PM

you can try to put different types of hair dye in it and then mix it together to see if there is a chemical reaction


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