The United States relies heavily on Fahrenheit—a measurement system that almost no other country in the world uses. Baffling right? Surely it is easier to understand that water becomes ice at zero and not thirty two and that water boils at 100 and not 212.
Let’s take this example:
In metric, 1 millimeter of water occupies 1 cubic centimeter, weighs 1 gram and requires 1 calorie of energy to heat up by one degree – which is one percent of the difference between its freezing point and its boiling point. An amount of hydrogen weighing the same amount has exactly one mole of atoms.
So on an American test the answer to the question, “How much energy does it take to boil a gallon of room temperature water”, the correct response would be “Go Fuck Yourself” because you can’t directly relate any of those quantities.
So if you are American and want to understand Celsius:
-10 and below: My feet are numb and I am losing the will to live
0: I’ll wear my new REI coat
10: I can wear shorts but I will need a sweatshirt
20: Very pleasant
25: Equally pleasant
30 and above: I don’t have A/C and it’s really hot.