ENERGY

This article is about the physical quantity. For other uses, see Energy (disambiguation).

Lightning is the electric breakdown of air by strong electric fields. Heat and light from a lightning produces a plasma motion of air molecules.

In physics and other sciences, energy (from the Greek ἐνέργεια - energeia, "activity, operation", from ἐνεργός - energos, "active, working"^[1]) is a scalar physical quantity that is a property of objects and systems which is conserved by nature. Energy is often defined as the ability to do work.

Several different forms of energy, including kinetic, potential, thermal, gravitational, sound energy, light energy, elastic, electromagnetic, chemical, nuclear, and mass have been defined to explain all known natural phenomena.