Heat energy is changed to light energy. Light energy is changed to heat energy. Potential energy is changed to kinetic energy. Kinetic energy is changed to chemical energy.
I gave my students this multiple choice question: What kind of energy change occurs when a battery is operating a remote control toy?

Only one answer is correct among these 4 choices:
- Heat energy is changed to light energy.
- Light energy is changed to heat energy.
- Potential energy is changed to kinetic energy.
- Kinetic energy is changed to chemical energy.

Could you tell me which one is correct?

Potential energy is changed to kinetic energy.