Time scale may refer to:
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Time standard
A time standard is a specification for measuring time: either the rate at which time passes or points in time or both. In modern times, several time specifications have been officially recognized as standards, where formerly they were matters o ...
, a specification of either the rate at which time passes, points in time, or both
*A duration or quantity of time:
**
Orders of magnitude (time)
An order of magnitude of time is usually a decimal prefix or decimal order-of-magnitude quantity together with a base unit of time, like a microsecond or a million years. In some cases, the order of magnitude may be implied (usually 1), like ...
as a power of 10 in seconds;
**A specific
unit of time
A unit of time is any particular time interval, used as a standard way of measuring or expressing duration. The base unit of time in the International System of Units (SI) and by extension most of the Western world, is the second, defined as ab ...
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Geological time scale
The geologic time scale, or geological time scale, (GTS) is a representation of time based on the rock record of Earth. It is a system of chronological dating that uses chronostratigraphy (the process of relating strata to time) and geochro ...
, a scale that divides up the history of Earth into scientifically meaningful periods
In astronomy and physics:
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Dynamical time scale, in stellar physics, the time in which changes in one part of a body can be communicated to the rest of that body, or in celestial mechanics, a realization of a time-like argument based on a dynamical theory
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Nuclear timescale, an estimate of the lifetime of a star based solely on its rate of fuel consumption
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Thermal time scale, an estimate of the lifetime of a star once the fuel reserves at its center are used up
In cosmology and particle physics:
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Planck time, the time scale beneath which quantum effects are comparable in significance to gravitational effects
In mathematics:
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Time-scale calculus, the unification of the theory of difference equations with differential equations
In music:
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Rhythm
Rhythm (from Greek
Greek may refer to:
Greece
Anything of, from, or related to Greece, a country in Southern Europe:
*Greeks, an ethnic group.
*Greek language, a branch of the Indo-European language family.
**Proto-Greek language, the assumed ...
, a temporal pattern of events
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Time scale (music), which divides music into sections of time
In project management:
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Man-hour
A man-hour (sometimes referred to as person-hour) is the amount of work performed by the average worker in one hour. It is used for estimation of the total amount of uninterrupted labor required to perform a task. For example, researching and wr ...
, the time scale used in project management to account for human labor planned or utilized
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