Kelvin (K)

Definition

Kelvin (K) is the SI unit of thermodynamic temperature. It is one of the seven base units in the International System of Units (SI).

5 Must Know Facts For Your Next Test

1. The Kelvin scale starts at absolute zero, where all molecular motion stops.
2. One kelvin is defined as 1/273.16 of the thermodynamic temperature of the triple point of water.
3. The Kelvin scale does not use degrees; it is simply 'kelvin.'
4. To convert Celsius to Kelvin, add 273.15 to the Celsius temperature.
5. Kelvin is essential for scientific measurements because it provides an absolute reference point.

Review Questions

• What is the starting point of the Kelvin scale?
• How do you convert a temperature from Celsius to Kelvin?
• Why is the Kelvin scale important in scientific measurements?

Related terms

Celsius: A temperature scale where water freezes at 0 degrees and boils at 100 degrees under standard conditions.

Absolute Zero: The lowest possible temperature, 0 K, where molecular motion ceases.

Thermodynamic Temperature: Temperature measured on an absolute scale based on fundamental physical laws.