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The Celsius temperature scale is derived from the Kelvin scale.
It corresponds to −273.15 °C on the Celsius temperature scale and to −459.67 °F on the Fahrenheit temperature scale.
It was known simply as the centigrade scale until in 1948 the name was changed to the Celsius temperature scale.
Celsius temperature scale, also called centigrade temperature scale, scale based on 0° for the freezing point of water and 100° for the boiling point of water.
An absolute temperature scale has as its zero point absolute zero (−273.15° on the Celsius temperature scale and −459.67° on the Fahrenheit temperature scale), the theoretical temperature at which the molecules of a substance have the lowest energy; hence, all values on such a scale are nonnegative.
An absolute temperature scale has as its zero point absolute zero (−273.15° on the Celsius temperature scale and −459.67° on the Fahrenheit temperature scale), the theoretical temperature at which the molecules of a substance have the lowest energy—hence, all values on such a scale are nonnegative.
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The Fahrenheit and Celsius temperature scales are examples of interval measurement.
The International Temperature Scale of 1990 (ITS-90) defines an equipment calibration standard for making measurements on the Kelvin and Celsius temperature scales.
The Celsius (°C) temperature scale is standard in virtually all countries that have adopted the metric system of measurement, and it is widely used in the sciences.
In essence, the Kelvin scale is the Celsius (°C) temperature scale shifted by 273.15 degrees (because the triple point of water is actually 0.01 °C), with the same size unit of temperature.
For example, in the Celsius (°C) temperature scale, the freezing point of pure water is arbitrarily assigned a temperature of 0 °C and the boiling point of water the value of 100 °C (in both cases at 1 standard atmosphere; see atmospheric pressure).
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