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Unit 1.2

Science

TermDefinition
atom the smallest unit of an element that maintains the properties of that elements.
element a substance that cannot be separated or broken down into simpler substance 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 substance that are not chemically combined.
pure substance a sample of matter,either a single elements 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 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 of 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: gioortiz
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