Question

Which best describes how energy changes form in a car’s engine?

A single transformation occurs because the chemical energy of the fuel is changed to the mechanical energy of the car.
A single transformation occurs because the mechanical energy of the car originates from one spark.
Multiple transformations occur because the chemical energy of the fuel is changed to several forms of energy.
Multiple transformations occur because the chemical energy of the fuel must be replenished to keep the car running.

Answer 1

Answer: "Multiple transformations occur because the chemical energy of the fuel is changed to several forms of energy."

Why: combustion converts the fuel's chemical energy into thermal energy and high-pressure gas; that gas does work on pistons (mechanical/kinetic energy). Some energy is also lost as heat to the engine, exhaust, and as sound/light and electrical energy (alternator).