Question

law of conservation of energy
energy cannot be

nor

, only

from one form to another.

Explanation:

The Law of Conservation of Energy states that energy is a fundamental quantity in the universe. It cannot be created out of nothing (creation would violate the principle as there is no source for new energy to pop into existence). Similarly, it cannot be destroyed completely (if it were destroyed, the total energy in the universe would decrease, which is not observed). Instead, energy changes its form. For example, potential energy in a raised object can be converted to kinetic energy as it falls; electrical energy can be converted to light and heat energy in a light - bulb.

Answer:

Energy cannot be created, nor destroyed, only converted from one form to another.