It is for this reason that we invent the unit MOLE, which is like a 'bakers dozen' of atoms. Unfortunately, we also have to 'scale' all the other units for very small and very large measurements. We do this by putting a prefix on the unit base that conveys how many powers of ten we wish to multiply or divide the base unit by. The unit of volume is defined to be 1 cubic decimeter. How the meter itself is defined is a long and historically boring story.
Rational beings use only absolute temperature scales.
If you always convert ALL of your temperatures to Kelvin at the beginning of every calculation, you cannot go wrong. Here is how the three most common temperature scales stack up. Scientific Method A complete philosophical dicussion of how science evaluates and understands nature through the test of hypothesis is clearly beyond the scope of this course.