Final answer:
True, some energy in machines is transformed into atomic or molecular kinetic energy, resulting in increased temperature due to heat energy from friction and resistance, manifesting as thermal energy.
Step-by-step explanation:
The statement that in all machines, some energy is transformed into atomic or molecular kinetic energy, which makes the machine warmer, is True. This happens because machines are not 100% efficient; during their operation, some of the energy they use is invariably converted into heat energy due to friction and resistance within the machine. This heat energy is essentially the increased kinetic energy of atoms and molecules within the materials of the machine. As these particles move faster, the machine's temperature rises. Thermal energy is the term used to describe this increase in the average kinetic energy of particles, and it is a form of kinetic energy itself.