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32 Cards in this Set
- Front
- Back
The human body's daily funtioning is based on
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chemical reactions
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Rusting iron and burning wood are examples of changes in
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chemical properties
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The lightest element on earth is
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hydrogen
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The most abundant element found on earth is
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oxygen
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Makes up 65% of the human body and covers 75% of the earth's surface
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water
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Is neutral on the pH scale
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7
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Number of substances that make up the physical mixtures of solutions, suspensions and emulsions
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two or more
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Type of mixture that creates suspensions of two or more substances
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uniform mixtures
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Type of emulsion in skin cleansers, moisturizers, and body washes
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Oil in water emulsions
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four-fifths of the air in our atmosphere is made up of this element
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nitrogen
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In w/o emulsions, droplets of water are surrounded by surfacants with their "heads" (hydrophilic ends) pointing ___ and their "tails" (lipophilic ends) pointing _____
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in, out
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This type of mixture makes solutions, suspensions and emulsions
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physical mixture
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Two or more atoms that are chemically joined together
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molecule
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Process ice melting to form water or water evaporating into steam
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change of state
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The potential hydrogen of a substance is its relative degree of
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acidity and alkalinity
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Anything below 7 on the pH scale is considered
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acidic
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A protective barrier of the skin
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acid mantle
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The three states of matter
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solid, liquid and gas
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Process in which antioxidants prevent free radical from occurring
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Neutralization
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In skin care preparation, surfacants
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wet the skin, disperse o/w, emulsify o/w
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The change of state of a substance without the formation of a new substance
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physical change
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Two type of chemical reactions that are important to Estheticians
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acid-alkali neutralization and oxidation reduction
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Droplets of oil are dispersed in water in this type of emulsion
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oil in water
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Two or more of this type of substance can only be united with an emulsifier to create an emulsion
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immiscible
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This type of matter has a definite size and shape
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solid
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This type of matter has a definite size but not a definite shape
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liquid
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Color, odor, weight, density, specific gravity, melting point, boiling point and hardness are all ____ traits of a substance
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physical
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A change in the chemical composition of a substance
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chemical change
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Represents a tenfold change in pH
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change of 1 whole number
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Rapid oxidation of a substance, accompanied by a production of heat and light
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combustion
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Solutions, suspensions and emulsions are differentited by the
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size of particles and solubility of components
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The types of substances are not mutually soluble
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immiscible
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