By Debbie McClinton
By Dr. Martin McClinton
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In this animated lesson, learners read about the disulfide bond, the second strongest chemical bond in the hair. This bond can only be altered by chemicals.
In this animated object, learners examine the properties of the peptide bond and how the bond relates to the structure of hair.
Students read descriptions of the six different ways in which electricity is produced: chemical, friction, heat, light, magnetism, and pressure.