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Unit 1.2

Science

TermDefinition
Atom The smallest unit of an element that maintain the properties of that element.
Pure Substance a sample of matter either a single element or a single compound that has definite chemical and physical properties
Element A substance that cannot be separated or broken down into simpler substances by chemical means.
Heterogeneous Describe something that does not have a uniform structure or composition throughout.
Compound A substance made up of atom of two or more different elements joined by chemical bond.
Homogeneous Describe something that has uniform structure or composition throughout.
Mixture A combination of two or more substance that are not chemically combined.
Solid The 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 does not have a definite volume or shape.
Freezing The change of state from liquid to solid.
Condensation The change of state from gas to liquid.
Melting The change of state from a solid to a liquid
Sublimation The change of state from directly toa gas.
Evaporation The change of state from liquid to a gas that usually occurs that the surface of a liquid over a wide rang of temperatures.
Deposition The change of state from a gas directly to a solid.
Boiling The change of state to liquid to gas that occurs at a specific temperature.
Created by: Yelitza.12
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