Review Questions VI Chapter 7 Flashcards
Skin care lotions are an example of what distinct form of matter?
Liquid
Which item have a negative electrical charge?
Electrons
Oils and oil soluble substances used to condition and soften the skin are called?
Emollients
What measurement indicates whether a substance is acidic, neutral or alkaline?
pH
What term is used to describe a base product?
Alkaline
All statements about physical changes that is true:
Chemical structure does not change
Involve either the gain or loss of energy
Freezing water to form ice is an example
All statements about solutions that is true:
The dissolved part is called the solute
Organic substances are not soluble in water
Cosmetic products tend to use water as the solvent
What are the basic materials that the body used to construct and renew itself?
Proteins
Which ingredients allow for the suspension of small particle solid in a base by creating a supporting structure to prevent settling?
Thickeners
The ingredient that makes up the largest percentage of many cosmetic skin care products is?
Water
The condition under which a solute will no longer dissolve evenly in the solvent is the?
Saturation point
Which cosmetic products is formed when two or more non mixable substances are united with small droplets of a binder?
Emulsion
What is the smallest particle of a compound that contains all of the chemical properties?
Molecule
What number identifies how many prions are in a single atom of an element on the periodic table?
Atomic number
Solvents that easily mix together are called?
Miscible
The most abundant element in the earth’s crust is?
Oxygen
This form of matter has a definite weight, volume, and shape:
Solid
The process in which a substance gains an electron and oxygen is then released is known as?
Reduction
What may contain salts such as calcium and magnesium?
Hard water
A mixture of sebum and sweat combined with lipids, minerals and moisture to form a protective barrier for the skin is called?
Acid mantle
What level of pH will increase the skin’s permeability and leave it vulnerable to injury by environmental factors?
8
What types of atoms have evenly paired electrons in their outermost orbit shell?
Stable atoms
Basic units of matter that cannot be broken down into simpler substances by a chemical reaction are called?
Elements
A change in a substance that creates a new substance with different material characteristics form those of the original substance is a?
Chemical change
Which ability to bind a wide range of organic and inorganic matter to water?
Surfactants
Wich cosmetic products is “forced together” by mixing the individual components using high temperatures or by agitating them?
Emulsion
Oils and oil soluble substances used to condition and soften the skin by providing a protective coating are called?
Occlusive barrier
The study of chemical reactions, such as growth, reproduction and respiration, that occur within a living organism is called?
Biochemistry
What is the average pH range of the skin?
4.5 to 5.5
The molecular weight of each element is determined by?
Protons and Neutrons
The part of the atom that has no electrical charge is the?
Neutrons
Which products has been formulated with a thickening agent to increase viscosity?
Gel
Statements regarding aerosols are true:
They are explosive and flammable
They are packaged under pressure
They are flammable
Statements about the Periodic Table of Chemical Elements are true:
There are 92 naturally occurring elements
Organised by their atomic number
Mendeleev and Meyer arranged the elements
The ability to do work to accomplish some change is?
Energy
The branch of science that deals with the chemicals related to life processes and their reactions within the body is called?
Organic chemistry
Which skin renewal agents include antioxidants that can heal tissue and strengthen the skin, among other benefits?
Vitamins
Products packaged under pressure and blended with a gas inside a container are called?
Aerosols
Wich materials dissolve and break down large molecules into smaller ones?
enzymes
What is created when two different elements are chemically united?
Compound
Which ingredients are included in cosmetic products to maintain the product quality during manufacturing, storage and usage?
Preservatives
Which statement is NOT true about fragrances?
Their ingredients are listed individually on label
What vegetable, mineral or pigment dyes that are added to products to enhance?
Coloring agents
Ingredients used in some treatment products to prevent skin inflammation and free radical damage are called?
Antioxidants
Acids or bases used to adjust the desired product pH level are called?
pH adjustors
Ingredients added to a product to enhance the effectiveness of a preservative are called?
Chelating agent
What is a non comedogenic emollient that gives products a silky feel?
Cyclomethicone
Which common ingredient groups delivers anti-inflammatory, antibacterial, anti-irritant and antioxidant benefits?
Botanicals
An ingredient used in skin care products to mask undesirable doors in the product base is?
Fragrance
Which terms identifies a product that offers a decreased tendency to provoke an allergic reaction?
Hypoallergenic
Chemically unstable molecules caused by environmental pollutants and UV exposure are called?
Free radical
Statements about sunscreens that are true:
They are usually 2% to 7% in concentration
They are considered drugs under FDA guidelines
They are used to block ultraviolet radiation
How many naturally occurring elements exist?
92
When no “trading” is taking place and the atom are sharing the electrons, they are held together by?
Covalent bond
When positive and negative ions join, they are held together by an?
Ionic bond
What is the pH pure distilled water?
7
