It depends, for example, it is quite important to know the Kelvin scale (i.e 0 degrees Celsius is 273 K and -273 degrees Celsius is 0 K ) when dealing gases. But I don't know other situations where you would need to know other temperature scales.
Hope this helps and also if you are using Fahrenheit 1 Fahrenheit is -17.22 degrees Celsius
Combustion=heat and light
decomposition=taking something away
single means one element changes
and double means two elements change l.
The properties of a mineral depend on the kind of atoms of mineral being examined
