(N/A) There are three common scales to measure temperature:
$(i)$ $^{\circ}C$ (degree Celsius)
$(ii)$ $^{\circ}F$ (degree Fahrenheit)
$(iii)$ $K$ (Kelvin),where $K$ is the $SI$ unit.
The thermometers based on these scales are shown in the figure.
Generally,the thermometer with the Celsius scale is calibrated from $0^{\circ}C$ to $100^{\circ}C$,where these two temperatures are the freezing point and the boiling point of water,respectively.
The Fahrenheit scale is represented between $32^{\circ}F$ to $212^{\circ}F$.
The temperatures on the two scales are related to each other by the following relationship:
$^{\circ}F = \frac{9}{5}(^{\circ}C) + 32$
The Kelvin scale is related to the Celsius scale as follows:
$K = ^{\circ}C + 273.15$
Temperatures below $0^{\circ}C$ (i.e.,negative values) are possible on the Celsius scale,but on the Kelvin scale,negative temperature is not possible.