9781422272879

WORDS TO UNDERSTAND

chemistry— the science that deals with the composition and properties of substances and various elementary forms of matter cosmetics— superficial measures to make something appear better, more attractive, or more impressive emollients— ingredients that soothe or soften skin and seal in moisture by slowing water evaporation emulsions— mixtures of two or more liquids in which one is present as droplets distributed throughout the other Kohl— an ancient cosmetic made by grinding stibnite psychology— the science of the mind or of mental states and processes

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