Units of Measurements

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Flashcards covering units of measurement, physical quantities, systems of units (SI and English), fundamental and derived units, metric prefixes, conversion factors, and scientific notation.

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10 Terms

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Units

Standardized values used to express measurements of physical quantities.

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Physical Quantity

A quantity that can be measured and expressed in terms of units.

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SI Units (System International d’Unites)

The system of units based on meter, kilogram, second, ampere, kelvin, mole, and candela. And everyone uses this system

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French or SI System

Also known as the metric system which is a system of measurement used by virtually every other country in the world with the exception of the United States.

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English Units

Also known as the imperial system, it is a system of measurement used primarily in the United States.

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Fundamental Physical Quantities

Physical quantities that are measured in base units: length, mass, time, electric current temperature, amount of substance, and luminous intensity.

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Derived Units

Units for other physical quantities (such as force, speed, and electric charge) described by mathematically combining these seven base units.

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Metric Prefixes

Factors of 10 that are attached to a unit in the metric system.

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Conversion Factor

A ratio expressing how many of one unit are equal to another unit.

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Scientific Notation

A way of writing numbers that are too large or small to be conveniently written as a decimal, following the general format x × 10y.