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matter vocab ps1

physical science vocab

QuestionAnswer
chemistry the study of matter and how it changes
matter anything that has mass and occupies space
element a substance that cannot be broken down into simpler substances
atom the smallest particle that has the properties of an element
compund a substance made of atoms of more than one element bound together
molecule the smallest unit of a substance that exhibits all of the properties characteristic of that substance
chemical formula the chemical symbols and numbers indicating the atoms contained in the basic unit of a substance
pure substance any matter that has a fixed composition and definite properites
mixture a combination of more than one pure substance
miscible describes two or more liquids that are able to dissolve into each other in various proportions
immiscible describes two or more liquids that do not mix into each other
pressure the force exerted per unit area of a surface
viscosity the resistance of a fluid to flow
energy the ability to change or move matter
evaporation the change of a substance from a liquid to a gas
condensation the change of a substance from gas to a liquid
sublimation the change of a substance from a solid to a gas
chemical property the way a substance reacts with others to form new substances with different properties
reactivity the ability of a substance to combine chemically with another substance
physical property a characteristic of substance that can be observed or measured without changing the compsition of the substance
melting point the temperature at which a solid becomes a liquid
boiling point the temperature at which a liquid becomes a gas below the surface
density the mass per unit volume of a substance
buoyancy the force with which a more dense fluid pushes a less dense substance upward
chemical change a change that occurs when a substance changes composition by forming one or more new substances
physical change a change in the physical form or properties of a substance that occurs without changing in composition
Created by: 1997sjcc2015
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