The use of and some
facts "information" about different temperature scales:
Celsius - Used by every normal person. Freezing point of water is 0 °C, boiling point of water is 100 °C.
Kelvin - Used by scientists. Uses the grading of Celsius but shifts the 0 to absolute zero, which is about -273 °C, and therefore 273 °K is close to the freezing point of water.
Fahrenheit - Used by the USA, Belize, Jamaica and a few other islands as well. The last temperature scale for common use that isn't Celsius. C'mon, just give up already.
Rankine - Used by patriotic 'Murican scientists. A crossbreed between Kelvin and Fahrenheit that uses the grading of Fahrenheit but has the 0 set to absolute zero.
Rømer - An attempt by the Danish to make sure that the prophesied Celsius scale would have failed to gain any attention, since everybody would use Rømer. Used by nobody ever.
(more to come)