Hairstyling

What is the primary protein found in hair that contributes to its structure?

• Keratin

• Collagen

• Elastin

• Myosin

Tags

NGSS.HS-LS1-1

Which part of the hair is responsible for its growth?

• Hair shaft

• Hair follicle

• Cuticle

• Cortex

What is the main chemical element found in hair?

• Carbon

• Oxygen

• Nitrogen

• Sulfur

Tags

NGSS.MS-PS1-1

Which scientific process is used to permanently change the structure of hair, such as in perming?

• Oxidation

• Reduction

• Hydrolysis

• Polymerization

What is the pH range of most shampoos designed for human hair?

• 3.5 to 4.5

• 4.5 to 5.5

• 5.5 to 6.5

• 6.5 to 7.5

Which layer of the hair is most affected by chemical treatments like dyeing?

• Cuticle

• Cortex

• Medulla

• Follicle

What type of bond is primarily responsible for the strength and elasticity of hair?

• Hydrogen bonds

• Disulfide bonds

• Ionic bonds

• Covalent bonds

Which vitamin is essential for maintaining healthy hair growth?

• Vitamin A

• Vitamin B12

• Vitamin C

• Vitamin D

What is the effect of humidity on hair?

• Makes hair dry

• Makes hair frizzy

• Makes hair oily

• No effect

Which scientific principle explains why hair appears darker when wet?

• Refraction

• Reflection

• Absorption

• Diffusion

Tags

NGSS.MS-PS4-2