1. When you eat your breakfast every morning, you were able to do work physically and intellectually. Why is this so?

A. Because chemical energy stored in food is transformed to mechanical and to heat energy.
B. Because chemical energy stored in food is transformed to heat energy.
C. Because chemical energy stored in food changes to sugar and starch.
D. Because chemical energy stored in food changes to potential energy.

2. Which statement best describes the energy transformation in a lighted candle?

A. Stored chemical energy from the paraffin is converted to heat energy.
B. Stored chemical energy from the paraffin is converted to electromagnetic to thermal energy.
C. Stored chemical energy from the paraffin is converted to light energy.
D. Stored potential energy from the paraffin is converted to kinetic energy.

3. When you put a battery to make the toy car runs, what energy transformation takes place?

A. Potential energy is transformed into kinetic energy.
B. Chemical energy is transformed to electrical to kinetic energy.
C. Kinetic energy is transformed into potential energy.
D. Radiant energy is transformed into chemical to kinetic

4. How is energy transformation transformed when you pluck or strum a guitar?

A. From mechanical to thermal energy.
B. From mechanical to sound energy.
C. from potential to chemical energy.
D. From mechanical to kinetic energy.

5. A dry cell has a stored energy. When you used it in a flashlight, the stored energy will be transformed to other forms of energy. How is the energy transformed?

A. chemical – mechanical – light
B. chemical – light – heat
C. chemical – electrical – light
D. heat – mechanical – chemical

6. As the hands of the clock strikes the time at which you have set the alarm, what forms of energy are transformed?

A. electrical – chemical – mechanical – sound
B. sound – mechanical – electrical - chemical
C. chemical – mechanical – electrical – sound
D. chemical – electrical – mechanical – sound

7. Which of the diagram shows energy transformation that takes place when a radio is turned on?

A. chemical – electrical – heat
B. electrical – chemical – light
C. chemical – electrical – sound
D. electrical – heat – sound

8. What energy transformation happen when father plug on the socket in the light bulb?

A. Electrical energy will transform to mechanical energy which will brighten the room.
B. Electrical energy will transform to light energy which will brighten the room.
C. Electrical energy will transform to heat energy which will brighten the room.
D. Electrical energy will transform to sound energy which will brighten the room.

9. What is always produce when energy transformation takes place?

A. Heat
B. Light
C. Mechanical
D. Sound

10. A candle that possess chemical energy should lighted so it can be used. What do you think will happen to its form of energy?

A. It remains
B. It transforms
C. It is constant
D. It never change

11. Which of the following situations demonstrate heat energy is transformed into light energy?

A. striking a drum
B. striking a matchstick
C. striking a bottle
D. striking a ball

12. Which of the following situations demonstrate light energy being transformed into heat energy?

A. Burning of firewood to keep you warm during cold weather.
B. Cooking rice by means of rice cooker.
C. Turning on the electric fan during hot weather.
D. Charging the cellphone before using it.

13. Which situations show electrical energy is transformed into heat energy?

A. using laptop for research
B. using air-condition unit during daytime
C. using water heater while bathing
D. using candle during brownout

14. The man turns on the radio to listen for the latest news. Which show the correct energy transformations that happen?

A. electrical – sound – heat
B. sound – heat – electrical
C. electrical – heat – sound
D. heat – sound – electrical

15. Most green plants convert the sun’s energy to produce food for humans to do certain work. What energy transformations are involved?

A. Radiant - chemical - sound
B. Chemical - solar - light
C. Solar - heat - mechanical
D. Solar - chemical - mechanical​