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| The study of matter, its transformations and how it behaves |
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| any physical substance that occupies space and has mass |
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| The length scale on which objects can be measured and observed by the naked eye |
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| nanoscale; molecular scale-objects that are smaller than those that can be seen by the naked eye |
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| matter that is composed of only one kind of atom |
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| a substance formed when two or more elements are combined in a defined ratio |
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| collection of atoms that are held together by chemical bonds |
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| matter that contains only one type of element or compound and has fixed chemical composition |
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| The characteristics of a chemical substance that do not change the chemical compostion of the material when they are measured |
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| particles are packed so closely together, usually in a regular array |
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| particales arranged randomly. They can move past each other but are constrained by their neighbors |
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| particles moving extremely rapidly because they are not constrained by their neighbors |
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| the temperature at which the solid is converted to a liquid |
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| the temperatire at which the liquid is converted to a solid. Same as melting point. |
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| temperaure at which liquid is converted to a gas |
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| a chnnage to the physical property of a substance |
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| the characteristics of a substance that involve a chemical change in material |
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| a change in the chemical compositon of a substance |
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| a substance made up of 2 or more elements or compounds that have not reacted chemically |
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| a mixture that has a constant compostion throughout the material |
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| a mixture that is NOT uniform throughout |
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| how close the values in a set of measurements are to one another |
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| how close a measurement or a set of measurements is to a real value |
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