List three ways hair may be damaged

Heat/Moisture/Bleaching

Explanation:

When applying too much hest on your hair with heating products that can damage hair shafts. With lack of moisture it can cause brittle hair and potentially hair breakage. Bleaching your hair can also be harmful as youre putting substances that destroy certain cells bacteria etc.

a chromatic scale uses the twelve tones of the octave, while a regular scale only uses eight, or seven different notes (as the first note is played twice)