Celsius: What is Celsius?

Celsius is a scale (sometimes called Centigrade) that is used in many countries as a unit of measurement for temperature. The Celsius scale was created by a Swedish astronomer called Anders Celsius.

On the scale, 0 degrees (°) Celsius is the melting point of pure water at sea level, at a normal pressure. 100° Celsius is the boiling point of water at normal pressure.

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The other temperature scales include:

Fahrenheit, Kelvin, Reamur, Romer