In this animated object, learners examine the properties of the hydrogen bond and how the bond changes when hair is shampooed or styled.

In this animated object, students examine the shades that result from mixing primary and secondary colors. Color tone and level are also defined.

In this animated object, learners examine the properties of the peptide bond and how the bond relates to the structure of hair.

In this animated object, learners examine how changes in pH affect the salt bonds in strands of hair.

Students view an enlarged, colorful depiction of the contents of an average square inch of skin.

Students view the 10 major bones of the skull and read a description of each bone.

In this animated object, learners view hydrogen and hydroxide ions in a solution. A brief quiz on the basic principles of the term pH completes the activity.