Eli5: I’m trying to find the best way to word this but how does one measure “negative degrees”, like in temperature, like how do you quantify the absence of something that isn’t tangible?

Question

Eli5: I’m trying to find the best way to word this but how does one measure “negative degrees”, like in temperature, like how do you quantify the absence of something that isn’t tangible?

In: Chemistry

Answer 1

Negative is just after water freezes for Celsius.
It’s like looking at years and there being BC and AD.
BC being before Christ.

Also there’s one actual temperature u can use to avoid having negative.
0 kelvins is absolute 0.