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Chem Unit 1 Matter

Unit 1

accuracy how close a measured value is to an accepted value
buoyancy the ability to float or tendency to float in water or other liquid
colloid a heterogeneous mixture composed of tiny particles suspended in another material
dimensional analysis a systematic approach to problem solving that uses conversion factors to move from one unit to another
extensive property a physical property, such as mass, length, and volume, that is dependent upon the amount of substance present
heterogeneous mixture one that does not have a uniform composition and in which the individual substances remain distinct (IE chicken noodle soup)
homogeneous mixture one that has a uniform composition throughout and always has a single phase; also called a solution
intensive property a physical property that remains the same no matter how much of a substance is present
physical property a characteristic that can be observed or measured without changing the sample’s composition
precision how close a series of measurements are to one another
scientific notation a system for reporting very small or very large numbers by writing the number as a decimal number between 1 and 10, multiplied by a power of 10
Significant figures a convention for recording measurements. Measurements are rounded so that they contain only the digits up to and including the first uncertain digit, when the number is written in scientific notation.
suspension type of heterogeneous mixture whose particles settle out over time and can be separated from the mixture by filtration
Tyndall effect the scattering of light by colloidal particles
Viscosity a measure to fluids resistance to flow
compressibility The ability to be compressed. A characteristic of substances, such as gases, that can be compressed to fit into smaller containers.
Created by: pdscience



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