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Unit 1.2

Science

TermDefinition
atom The smallest of an element that maintain 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 combination of two or more substances that are not chemically combined.
pure substance 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 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 ta a solid.
melting The change of state from a solid to a liquid.
evaporation The change of state from 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 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: luis4263
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