Theoretically, the lowest temperature a substance or object can reach is called absolute zero. Absolute zero is the beginning of the Kelvin scale: 0 K. It is equivalent to -460 degrees F, or -273.15 degrees C. At that point, all molecular motion would shut down, and no heat energy would be produced. It is physically impossible to reach absolute zero. Even way out in deep space, molecules are always in some level of movement. Scientists have gotten very close to achieving absolute zero through special refrigeration techniques.
Which of these best describes absolute zero?
A
It is the point at which all molecular movement stops.
B
It is the lowest temperature ever recorded in space.
C
It is the temperature at which liquids turn into gas.
D
It is equivalent to 100 K.