45In meteorology, three different temperature scales are used:
Fahrenheit, Celsius, and Kelvin. German-born scientist Gabriel
Daniel Fahrenheit developed the Fahrenheit Scale. He introduced
his scale and new mercury thermometer in 1714 in Holland. Zero
Fahrenheit was the coldest temperature Fahrenheit could create
with a mixture of ice and salt. On the Fahrenheit Scale, water
freezes at 32 and boils at 212. Swedish astronomer Anders
Celsius introduced his scale in 1742. He used 0 as the freezing
point of water, and 100 as the boiling point. For many years,
the Celsius scale was also called the Centigrade because the
Greek prefix "centi-" means one-hundredth, and each degree
Celsius is one-hundredth of the way between the freezing and
boiling points of water. The third scale we use is the Kelvin
Scale. British scientist William Thomson, Lord Kelvin did
research on heat in the 1800s. Theoretically, the coldest
temperature possible is -273.15 Celsius. This temperature is
called absolute zero because at this temp