Energy conversion reduces efficiency. Energy is destroyed at high temperatures. Energy loss increases the order in a system. Energy levels increase as conversions take place.
I gave my students this multiple choice question: The average car uses about 25% of the available energy in each gallon of gasoline. The energy not used to run the car is released as heat and sound. Which statement best describes this occurrence?

Only one answer is correct among these 4 choices:
- Energy conversion reduces efficiency.
- Energy is destroyed at high temperatures.
- Energy loss increases the order in a system.
- Energy levels increase as conversions take place.

Could you tell me which one is correct?

Energy conversion reduces efficiency.