Units of Measurements

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

Units

Standardized values used to express measurements of physical quantities.

Physical Quantity

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

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

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.

English Units

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

Fundamental Physical Quantities

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

Derived Units

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

Metric Prefixes

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

Conversion Factor

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

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.