A defined unit in a system of measurement that is based on an object or event in the physical world and is independent of other units.

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A ratio of equivalent values used to express the same quantity in different units; is always equal to 1 and changes the units of a quantity without changing its value.

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The amount of mass per unit volume; a physical property.

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A unit defined by a combination of base units.

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A systematic approach to problem solving that uses conversion factors to move from one unit to another.

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The difference between an experimental value and an accepted value.

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A visual display of data such as a circle graph, line graph, or bar graph.

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The SI base unit of temperature.

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The SI base unit for mass; about 2.2 pounds.

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The metric unit for volume equal to one cubic decimeter.

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The SI base unit for length.

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The ratio of an error to an accepted value.

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Refers to how close a series of measurements are to one another; precise measurements show little variation over a series of trials but might not be accurate.

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Expresses any number as a number between 1 and 10 (known as a coefficient multiplied by 10 raised to a power (known as an exponent).

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The SI base unit for time.

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The number of all known digits reported in measurements plus one estimated digits.

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