What is the temperature at which all molecular movement ceases called?

The temperature at which all molecular movement ceases is referred to as absolute zero. This concept is rooted in thermodynamics and represents a theoretical limit where a system's entropy reaches its minimum value, and its internal energy is at its lowest possible state. In the Kelvin temperature scale, absolute zero is defined as 0 Kelvin, which is equivalent to -273.15 degrees Celsius.

At absolute zero, the motion of atoms theoretically stops because they can no longer possess kinetic energy, leading to a complete lack of thermal energy in the material. This foundational principle is critical in understanding the behavior of matter at extremely low temperatures, including phenomena such as superconductivity and Bose-Einstein condensation.

The other provided choices do not accurately describe this unique temperature. "Positive zero" and "negative zero" are not recognized scientific terms related to thermal energy, while "minimum zero" does not correspond to any established temperature measurement in the context of physics. Thus, absolute zero is the term that rightfully captures this concept in thermodynamics and molecular physics.