The law of the conservation of energy means that energy can neither be created or destroyed, only transformed from one form to another. Normally, we speak of the energy of motion, called kinetic energy , or stored energy, called potential energy . Potential energy as stored energy, for example as spring, also has a source from the gravitational field of a star or planet. A hammer held above the ground has the potential energy associated with its distance from the ground. This energy is released into kinetic energy when the hammer is dropped.
Energy also exists in chemical, nuclear, and electrical form.
But these are mostly variations on kinetic and potential energies. Electrical energy is the kinetic energy of the electrons in the wire. Plasmas are only found naturally in the coronae and cores of stars. Notice that increasing the kinetic energy of the atoms weakens their bonds. Atomic theory is the field of physics that describes the characteristics and properties of atoms that make up matter.