Physical or Chemical Change?
- Temporary Hair Dye: Physical change because it just lies on the hair shaft.
- Semi-Permanent: Chemical because it’s causing a long-lasting color change.
- Permanent: Chemical because it’s causing a permanent color change.
- Bleach: Chemical change because the hydrogen peroxide is reacting with the melanin (the part of the hair that gives it the color).
12.
Temporary hair dye washes out, so it is a physical change.