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Worksheets

Cos 1 Unit 102 Test

Total questions: 25

Worksheet time: 25mins

Name
Class
Date
1.

Which of the following statements describes how human hair is formed?

a)

salt bonds connect to amino acids

b)

hydrogen bonds create a chemical change

c)

bonding of protein chains to other protein chains

d)

amino acids cause a simple physical change

2.

When amino acids combine to form the protein of the hair:

a)

the hair’s amino acid content will decrease

b)

they form a new amino acid group

c)

they take on a spiraling configuration

d)

the hair’s amino acid content will increase

3.

Which bond is the backbone of all protein molecules?

a)

salt

b)

keratin

c)

peptide

d)

hydrogen

4.

Carbon, nitrogen, oxygen, and hydrogen form the basis of:

a)

mixtures

b)

elements

c)

compounds

d)

amino acids

5.

When two hydrogen atoms combine with one oxygen atom, the result is water, which is called a(n):

a)

atom

b)

mixture

c)

elements

d)

compounds

6.

What is the side bond that is of the greatest concern to the salon professional?

a)

salt bond

b)

disulfide bond

c)

hydrogen bond

d)

van der Waals forces

7.

Putting a sodium hydroxide relaxer under a hair dryer:

a)

will link together all protein groups

b)

could turn into van der Waals forces

c)

will increase the hair’s amino acid content

d)

could break the critical peptide bonds and destroy the protein structure

8.

What makes up the primary composition of hair?

a)

keratin

b)

protons

c)

electrons

d)

trace minerals

9.

Atoms that are different form a(n):

a)

atom

b)

mixture

c)

emulsion

d)

compound

10.

Neutrons have which type of electrical charge?

a)

none

b)

chemical

c)

positive

d)

negative

11.

Basic substances that cannot be broken down into simpler substances are called:

a)

solids

b)

elements

c)

molecules

d)

compounds

12.

Matter with definite weight and volume but no definite shape is called:

a)

organic

b)

a gas

c)

raindrops turning to snow

d)

oxygen and hydrogen combining to form water

13.

Substances of acidic or alkaline nature dissolve in water and/or contain:

a)

salt

b)

water

c)

carbon

d)

hydrogen

14.

When a solution has an equal number of hydrogen and hydroxide ions, the solution is considered:

a)

acidic

b)

neutral

c)

alkaline

d)

slightly alkaline

15.

On the pH scale, numbers less than 7 indicate a(n):

a)

acidic solution

b)

neutral solution

c)

chemical solution

d)

alkaline solution

16.

A pH of 5 is how many more times acidic than a pH of 6?

a)

1.5

b)

10

c)

100

d)

1,000

17.

What is the pH range of hair, skin, and nails?

a)

4.5 to 5.5

b)

6.5 to 7.0

c)

7.5 to 10.5

d)

11.5 to 12.0

18.

Substances of acidic or alkaline nature dissolve in water and/or contain:

a)

water

b)

salt

c)

carbon

d)

hydrogen

19.

Which bond is the backbone of all protein molecules?

a)

salt

b)

keratin

c)

peptide

d)

hydogen

20.

Which of the following conditions is an example of chemical change?

a)

water to ice

b)

water to steam

c)

oxygen and hydrogen combining to form water

d)

raindrops turning to snow

21.

The term used to identify anything that occupies space and has weight is called:

a)

a gas

b)

matter

c)

a solid

d)

organic

22.

On the pH scale, numbers greater than 7 indicate a(n):

a)

acidic solution

b)

neutral solution

c)

alkaline solution

d)

chemical solution

23.

pH balanced refers to a product that ranges from a pH of:

a)

4.5 to 5.5

b)

6.5 to 7.0

c)

7.5 to 10.5

d)

11.5 to 12.0

24.

What is the side bond that is of the greatest concern to the salon professional?

a)

salt bond

b)

disulfide bond

c)

hydrogen bond

d)

van der Waals forces

25.

Distilled water with a pH of 7 is considered:

a)

a salt

b)

neutral

c)

an acid

d)

an alkali