What scales to you use to measure temperature and why?
C is equal to an increase in 1K however it is 273.15 lower so zero is at the lowest temperature possible. Farenheit was calculated using 3 reference points, a mixture of ice, ammonia chloride and body temperature, and Rankine is related to farenheit in the same way that Kelvin is to Celsius, increasing at the same rate but being zero at absolute zero.