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Physical Science

Chapter 2 (Matter)

WordDefinition
Density the mass per unit volume of a substance
Boiling Point the temperature at which a liquid becomes a gas below the surface
Melting Point the temperature at which a solid become a liquid
Physical Property a characteristic of a substance that can be observed or measured without changing the composition of the substance
Evaporation the change of a substance from a liquid to a gas
Energy the ability to change or move matter
Viscosity the resistance of a fluid to flow
Pressure the force exerted per unit area of a surface
Immiscible describes two or more liquids that do not mix into each other
Miscible describes two or more liquids that are able to disslove into each other in various proportions
Sublimation the change of a substance from a solid to a gas
Condensation the change of a substance from a gas to a liquid
Reactivity the ability of a substance to combine chemically with another substance
Chemical Formula the chemical symbols and numbers indicating the atoms contained in the basic unit of a substance
Molecule the smallest unit of a substance that exibits all of the properties and characteristics of that substance
Compound a substance made of atoms of more than one element bound together
Physical Change a change that occurs in the physical form or properties of a substance that occurs without a chenge in composition
Atom the smallest partical that has the properties of an element
Chemical Change a change that occurs when a substance changes composition by forming one or more new substances
Element a substance that cannot be broken down into simpler substances
Matter Anything that has mass and occupies space
Chemistry the study of matter and how it changes
Bouyancy the force with which a more dense fluid pushes a less dense substance upward
Chemical Property the way a substance reacts with others to form new substances with different properties
Mixture a combination of more than one pure substance
Pure Substance any matter that has a fixed composition and definite properties
Created by: soccer1234564 on 2006-12-08



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