Which unit is used to measure temperature?

The Kelvin is the unit of measurement for temperature that is used primarily in science and engineering. It is part of the International System of Units (SI) and is especially important in the field of thermodynamics, where absolute temperature measurements are required. The Kelvin scale begins at absolute zero, which is considered the point at which all molecular motion ceases, making it a fundamental reference point in physics.

The Kelvin scale has a direct relationship with other temperature scales, such as Celsius and Fahrenheit, although it operates differently by not using negative numbers. For example, water freezes at 273.15 K and boils at 373.15 K, corresponding to 0 °C and 100 °C, respectively. This clear distinction makes the Kelvin particularly useful when dealing with scientific calculations involving temperature.

In summary, using the Kelvin allows for precise measurements necessary in many scientific applications, setting it apart from other scales that might be more commonly used in everyday situations.