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Intro to Matter

Prentice Hall Science Explorer Chemical Building Blocks Ch. 1

Characteristic Property A quality of a substance that never changes and can be used to identify the substance
boiling point the temperature at which a substance changes from a liquid to a gas
melting point the temperature at which a substance changes from a solid to a liquid
physical change A change in a substance that does not change its identity; for example, a change of state
chemical change A change in which one or more substances combine or break apart to form new substances
chemical activity A characteristic property of a substance tht indicates its ability to undergo a specific chemical change
mixture Two or more substances that are misxed together but not chemically combined
pure substance a substance made of only one kind of matter and having definite properties
element a substance that cannot be broken down into other substances by chemical or phyusical means
compound a substance made of two or more elements chemically combined
weight a measure of the force of gravity on an object
mass A measure of how much matter is in an object.
International System of Units (SI) The system of units used my scientists to measure the properties of matter
volume The amount of space that matter occupies
density The measurement of how much mass of a substance is contained in a given volume
atom The smallest particle of an element
molecule A combination of two or more atoms
chemical bond The force that holds two atoms together.
ore A rock that contains a metal or other economically useful element
electrolysis A process by which an electric current breaks chemical bonds
electrode a metal strip used in electrolysis
Created by: MrsSchiemann