Chemistry of Products Used in Cosmetology Review

Front

Why should beauty professionals study and have a thorough understanding of chemistry?

Back

Because every product used in beauty and wellness contains some type of chemical.

Answer explanation

Beauty professionals must understand chemistry because all beauty and wellness products contain chemicals. This knowledge ensures safe and effective use of products, making it essential for their practice.

Front

The effects of cosmetics and beauty products are based on which of the following? How the body reacts to chemicals, How friends and family members react to a new look, How pleased the beauty professional is with the results, How favorably the new styles compare with the old

Back

How the body reacts to chemicals

Answer explanation

The effects of cosmetics and beauty products depend primarily on how the body reacts to chemicals in these products, as this determines their safety and effectiveness.

Front

Which of the following is TRUE of creams, lotions, masks, and makeup? They never contain chemicals., They only contain chemicals if they are not made from natural sources such as plant extracts., They only contain chemicals if they come from ingredients manufactured in a laboratory., They contain chemicals whether they come from natural sources or from ingredients manufactured in a laboratory.

Back

They contain chemicals whether they come from natural sources or from ingredients manufactured in a laboratory.

Answer explanation

The correct choice states that creams, lotions, masks, and makeup contain chemicals from both natural sources and laboratory-manufactured ingredients. All cosmetic products include chemical components, regardless of their origin.

Front

Any substance that occupies space and has weight is ______.

Back

matter

Answer explanation

The correct answer is b. matter, as it is defined as any substance that occupies space and has weight. Options a, c, and d do not encompass this definition.

Front

Everything you can touch and everything you can see is matter EXCEPT _____?

Back

light and electricity

Answer explanation

Light and electricity are forms of energy, not matter. Matter is defined as anything that has mass and occupies space, which excludes these energy forms.

Front

Which of the following is the simplest form of chemical matter? a liquid, a gas, an element, a chemical

Back

an element

Answer explanation

An element is the simplest form of chemical matter because it cannot be broken down into simpler substances. Liquids and gases can be composed of elements or compounds, while 'a chemical' is a broader term.

Front

How many elements are known to science today?

Back

118

Answer explanation

As of now, science recognizes 118 elements in the periodic table, with the most recent additions being synthetic elements. Therefore, the correct answer is 118.

Front

Of all the elements known to science today, how many occur naturally on Earth?

Back

98

Answer explanation

There are 98 elements that occur naturally on Earth, including all the elements from hydrogen to californium. The other options (18, 19, 89) do not account for all naturally occurring elements.

Front

_____ are the basic units of matter.

Back

Atoms

Answer explanation

Atoms are the fundamental units of matter, consisting of protons, neutrons, and electrons. While protons and neutrons are found in the nucleus, electrons orbit around it, making atoms the basic building blocks of all substances.

Front

Which of the following is an example of a compound molecule? Options: the oxygen we breathe, the ozone layer, common table salt, pure nitrogen

Back

common table salt

Answer explanation

Common table salt is a compound molecule made of sodium and chlorine (NaCl). In contrast, oxygen, ozone, and nitrogen are either elements or allotropes, not compounds.