The Kelvin Scale is a temperature scale used primarily in scientific contexts. It starts at absolute zero, which is the point where all molecular motion ceases, defined as 0 K. Each increment on the Kelvin scale is equivalent to one degree Celsius, making it a direct measure of thermal energy. Unlike the Celsius and Fahrenheit scales, the Kelvin scale does not use negative numbers. For example, the freezing point of water is 273.15 K, while the boiling point is 373.15 K. This scale is essential in fields like physics and engineering, where precise temperature measurements are crucial.