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Unit 1.2

Science

TermDefinition
Atom The smallest unit of an element that maintains the properties of that element.
Element A substance that cannot be separated or broken down into simpler substances by chemical means.
Compound A substance made up of atoms of tow or more different elements joined by chemical bonds.
Mixture A combination of two or more substances that are not chemically combined.
Pure substances A sample of matter, either a single element or a single compound, that has definite chemical and physical properties.
Heterogeneous Describes something that does not have a uniform structure or composition throughout.
Homogeneous Describes something that has a uniform structure or composition throughout.
Solid The state of matter in which the volume and shape of a substances are filled.
Liquid The state of matter that has a definite volume but not a definite shape.
Gas A form of matter that does not have a definite volume or shape.
Freezing The change of state from a liquid to a solid.
Melting The change of state from a solid to a liquid.
Evaporation The change of state from a liquid to a gas that usually occurs at the surface of a liquid over a wide range of temperatures.
Boiling The change of state from a liquid to a gas that occurs at a specific temperature.
Condensation The change of state from a gas to a liquid.
Sublimation The change of state from a solid directly to a gas.
Deposition The change of state from a gas directly to a solid.
Created by: taylexi2003
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