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| the process of studying natural phenomena, involving observations, forming laws and theories, and testing of theories by experimentation |
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| a quantitative observation |
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| one or more assumptions put forth to explain the observed behavior of nature |
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| a set of assumptions put forth to explain some aspect of the observed behavior of matter |
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| a set of assumptions put forth to explain observed behavior of matter. It usually involves assumptions about the behavior of individual atoms or molecules. |
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| a statement that expresses generally observed behavior |
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| Law of Conservation of Mass |
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| mass is neither created nor destroyed |
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| International System of units based on the metric system and units derived from the metric system |
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| the quantity of matter in an object |
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| the force exerted on an object by gravity |
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| the characteristic that any measurement involves estimates and cannot be exactly reproduced |
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| the certain digits and the first uncertain digit of a measurement |
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| the agreement of a particular value with the true value |
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| the degree of agreement among several measurements of the same quantity; the reproducibility of a measurement |
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| an error that has an equal probability of being high or low |
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| an error that always occurs in the same direction |
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| expresses a number as N x 10^M, a conventional method for representing a very large or very small number and for easily indicated the number of significant figures |
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| an equivalence statement between units used for converting from one unit to another |
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| another term for "unit factor method" |
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| a property of matter representing the mass per unit volume |
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| the material of the universe |
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| the three different forms in which matter can exist; solid, liquid, and gas |
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| a mixture having visibly indistinguishable parts |
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| a mixture having visibly distinguishable parts |
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| a substance with constant composition |
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| a change in the form of a substance, but not in its chemical composition; chemical bonds are not broken in a physical change |
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| a method for separating the components of a liquid mixture that depends on differences in the ease of vaporization of the components |
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| a method for separating the components of a mixture containing a solid and a liquid |
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| the general name for a series of methods for separating mixtures by employing a system with a mobile phase and a stationary phase |
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| a type of chromatography that employs a strip of porous paper, such as filter paper, for the stationary phase |
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| a substance with constant composition that can be broken down into elements by chemical processes |
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| the change of substances into other substances through the relative numbers of reactant and product molecules |
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| a substance that cannot be decomposed into simpler substances by chemical or physical means |
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