Absolute temperature is a measure of temperature that starts from the lowest possible temperature, known as absolute zero. At absolute zero, which is 0 Kelvin (K) or -273.15 degrees Celsius (°C), the motion of atoms theoretically comes to a complete stop. This scale is used in scientific contexts to provide a consistent reference point for temperature measurements. The Kelvin scale is the most common scale for absolute temperature. Unlike the Celsius and Fahrenheit scales, which are based on specific physical properties of water, the Kelvin scale is directly related to the kinetic energy of particles. As temperature increases in Kelvin, the energy and motion of particles also increase, making it a crucial concept in thermodynamics and physics.