It isn't since in the fahrenheit scale temperatures drop below zero as well. It's just that we rate a lot of stuff on a scale of 0 to 100, so with the fahrenhei

It isn't since in the fahrenheit scale temperatures drop below zero as well. It's just that we rate a lot of stuff on a scale of 0 to 100, so with the fahrenheit system it just makes sense to know that 0 is really cold and 100 is really hot.