2. Temperature, heat and pressure

Celsius Scale and Kelvin Scale

The Celsius scale is the scale most used to express temperature. Almost everyone uses the Celsius scale (degree Celsius) for the measurement of most measurements. The variation between one degree and the next on a Celsius scale is the same as on a Kelvin scale.

The difference between the Celsius and Kelvin scales is in fixing their null point:

  • On the Celsius scale, 0ºC corresponds to the freezing point of water.
  • On the Kelvin scale, 0 degrees corresponds to the minimum level that a body could theoretically reach.

Kelvin scale intervals are measured in kelvin but were previously called Kelvin degrees.

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