Choose the letter of the correct answer. Write it on the space before each number.

______1. What energy is produced by vibrating objects?
A. chemical energy C. mechanical energy
B. electrical energy D. sound energy

______2. The energy that comes from the flow of electrons from one material to another is called______.
A. chemical energy C. mechanical energy
B. electrical energy D. sound energy

______3. Which medical instruments make use of sound energy to detect abnormalities of internal
organs
stethoscope and ultrasound machines C. thermometer and lens
scanning machines D. lasers and x-rays

______4. What energy is needed by plants to manufacture food?
A. sound energy C. mechanical energy
B. light energy D. electrical energy

______5. Which energy allows radio, TV, computers, washing machine to function?
A. light energy C. mechanical energy
B. electrical energy D. sound energy

______6. What form of energy is produced when the strings of a guitar are plucked?
A. mechanical C. electrical
B. radiant D. sound

______7. What form of energy operates Light Rail Transit (LRT) and Metro Rail Transit (MRT)?
A. electrical energy C. sound energy
B. solar energy D. light energy

______8. What is always produced when energy transformation occur?
A. electricity C. heat
B. light D. sound

______9. Which energy transformation occurs in an electric iron?
electricity to heat C. light to heat
heat to light D. heat to electricity

______10. Which of the following shows that electrical energy is changed to light energy?
playing a guitar C. lighting of candle
turning on a fluorescent bulb D. using sunlight to dry up clothes​