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### 13 Cards in this Set

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 Accuracy A relative measure of the ability of an insturment to correctly measure the mass, or other characteristic, of an object: it is also the correctness of the measurement Balance A device used to measure the gravitational mass of a body. THe device consits of a lever arm that is balanced on a fulcrum pivot. This lever usually has a material pan on one end and some standard counterweights on the other end Buoyancy The force that pushes an object up and makes it seem to lose weight while in a fluid Density THe amount of mass contained in a given volume of material Gravitational force The attractive force that exits between any two bodies that have mass Hydrometer A floating insturement that is used to determine the density of liquids Kilogram The basic unit of mass in the metric system: abbreviated kg. (One liter of waster has a mass of 1- kilogram) Mass The amount of material in an object; expressed in grams and kilograms Matter The material a thing is made of, having mass and occupying space Precision A measure of an insturement's Ability to repeat a measurement and get the same result Range A measurement of the spread of a set of measurements. THe range can be found by taking the difference of the largest measurement and the smallest measurement Ratio A fractional comparison of two numbers. The ratio of A t oB, or can be, expressed as A/B Specific Gravity The ratio of the density of a material to the density of a standard