Four students write down descriptions of absolute zero during a lesson on the particle model.
Which student is correct?
It is the temperature at which the average kinetic energy of the particles is at its minimum.
It is the temperature at which particles start to move at the speed of light.
It is the temperature of 0∘C0^\circ\text{C}0∘C.
It is the temperature at which particles lose all their mass.
321 exam-style questions on CIE IGCSE Physics 2.1 Kinetic particle model of matter, covering 2.1.1 States of matter and changes of state, 2.1.2a Particle structure and motion in solids, liquids and gases, 2.1.2b Gas pressure and particle collisions, 2.1.2c Brownian motion, 2.1.3a The absolute scale of temperature, and 2.1.3b Pressure, volume and temperature of a gas. Each one has a worked solution and a mark scheme showing where the marks go.