Cannot add notes during assessments. Temperature and Thermal Energy absolute zero: a theoretical temperature at which the motion of all atoms and molecules stops; the coldest possible temperature convert: to change from one form or system to another internal energy: the total potential and kinetic energies of the particles in a substance scale: a series of marks and numbers that is used for measurement temperature: a measure of the average kinetic energy of the particles in a substance thermal energy: the part of total internal energy that can be transferred thermometer: a tool used to measure temperature convert: to change from one form or system to another internal energy: the total potential and kinetic energies of the particles in a substance thermal energy: the part of total internal energy that can be transferred