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13 Cards in this Set

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accuracy
a relative measure of the ability of an instrument 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 consists of a lever arm that is balanced on a fulcrum, pivot. This lever arm usually has a material pan on one end and some standard counterweights on the other.
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 materials.
gravitational force
The attractive force that exists between two objects that have mass.
hydrometer
A floating instrument that is used to determine the density of a liquid.
kilogram
The basic unit of mass in the metric sys. (1 L of water is equal to one kg).
mass
the amount of material that is in an object that is expressed in g's and kg's.
matter
The material a thing is made up, having mass and occupying space.
precision
A measure of an instrument's ability to repeat a measurement and get the same result.
range
A measurement of the spread of a set of measurements. Range is found by taking the difference of the smallest measurement from th largest measurement.
ratio
A fractional comparison of two numbers. The ratio of A to B can be expressed as A/B.
Specific Gravity
The ratio of the density of a material to the density of a standard.