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A temperature scale is a way of quantifying temperature. Different temperature scales exist, each with its own reference points and intervals. The most common scales used in science and everyday life are Celsius, Fahrenheit, and Kelvin.

The Celsius scale, often denoted by °C, uses the freezing point of water as 0°C and the boiling point as 100°C at standard atmospheric pressure. It is widely used internationally in scientific and meteorological contexts, as well as in many countries for everyday temperature measurements.

The Fahrenheit scale, denoted by °F, sets the freezing point of water at 32°F and the boiling point at 212°F. This scale is primarily used in the United States for weather, cooking, and most non-scientific applications.

The Kelvin scale, denoted by K, is the base unit of thermodynamic temperature in the International System of Units (SI). It is an absolute temperature scale, meaning that 0 K represents absolute zero, the theoretical point at which all molecular motion ceases. The freezing point of water is 273.15 K, and the boiling point is 373.15 K. The Kelvin scale is crucial in scientific research, particularly in fields like physics and chemistry.

Conversions between these scales are possible using specific mathematical formulas. Understanding the different temperature scales and their applications is fundamental to comprehending various physical phenomena and communicating temperature-related information accurately.