when heat is added to a substance, describe how the molecules are affected. (Hint) - Kinetic energy is the energy of motion, and potential energy is related to position. Will Mark Brainliest.

This is also called thermal energy - the greater the thermal energy, the greater the kinetic energy of atomic motion, and vice versa. The average thermal energy of a group of molecules is what we call temperature, and when thermal energy is being transferred between two objects, it's known as heat.