ANY THING THAT HAPPENS - from a pin drop to an explosion-requires energy.Energy is the capacity for "doing work"(making something happen)various forms of e,energy exists ,including light, heat,sound,electrical,chemical,nuclear, kinetic,and potential energies.The law of conservation of energy states that the total amount of energy in the Universe is fixed energy cannot be created or destroyed .It means that energy can only change from one form to another.(energy transfer).For example,potential energy is energy that is " stored "and can be...