Life Skills Cosmetology

What is the primary function of keratin in human hair?

• To provide color

• To provide strength and structure

• To moisturize the hair

• To protect against UV rays

Which vitamin is essential for healthy skin and is often found in skincare products?

• Vitamin A

• Vitamin B12

• Vitamin C

• Vitamin D

What is the pH range of healthy human skin?

• 3.5 to 4.5

• 4.5 to 5.5

• 5.5 to 6.5

• 6.5 to 7.5

Which of the following is a common method for measuring the strength of hair?

• Tensile testing

• pH testing

• Colorimetric analysis

• Spectroscopy

What is the role of melanin in the skin?

• To provide elasticity

• To protect against UV radiation

• To regulate temperature

• To produce sweat

Which of the following is a natural emollient often used in cosmetics?

• Lanolin

• Benzene

• Acetone

• Ethanol

What is the main component of the outer layer of human skin?

• Collagen

• Elastin

• Keratin

• Melanin

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

• Oxidation

• Reduction

• Hydrolysis

• Polymerization

What is the scientific term for the study of hair and its diseases?

• Trichology

• Dermatology

• Cosmetology

• Oncology

Which of the following ingredients is commonly used in sunscreens to block UV rays?

• Zinc oxide

• Sodium chloride

• Calcium carbonate

• Magnesium sulfate

Tags

NGSS.HS-PS4-3