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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 two or more different elements joined by chemical bonds
Mixture A mixture contains two or more substances that are not chemically combined.
Pure Substance A sample of matter, either an element or a single compound, that has definite chemical and physical properties
Heterogeneous Describe something that does not have a uniform structure or composition throughout
Homogeneous Describe something that has a uniform structure or composition throughout
Solid A state of matter in which the volume and shape of a substance are fixed
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 gas
Deposition The change of state a gas directly to a solid
Created by: yvng.nizzy
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