Law of Conservation of Energy
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
During a chemical or physical change, energy changes from one form into another but is never created or destroyed overall.
Show
Gasoline's stored chemical potential energy converts into the kinetic energy of a car's moving pistons, not into additional energy overall.
Watch for
A reaction that seems to produce energy "from nothing" is converting some unmeasured input form; it never actually breaks this law.