eli5:- why do we use 3 different measurements for temperature??!

Question

The most accurate and scientific is the kelvin scale and the SI unit of temperature and maybe their were different scales used in different countries but why use all three of them everywhere. Like we can use USA using miles while other countries use kilometer. But they both are not used at a single time at a single place. But why use 3 scales at once?

In: 0

Answer 1

Kelvin is good for measuring the temperature of atoms.
Celsius is good for measuring the temperature of water.
Fahrenheit is good for measuring the temperature of people.