Which of the following sources of light energy is used in photosynthesis? *
A. sun
B. moon
C. flashlight
D. electric bulb
2. What object can change electrical energy into light energy? *
A. fire
B. lamp
C. candle
D. electric fan
3. What form of energy can be produced from the light energy of the sun to the solar panels? *
A. sound energy
B. electrical energy
C. chemical energy
D. nuclear energy
4. Which sequence of energy transformation takes place when you turn on a microwave oven? *
A. electrical energy → light energy → heat energy
B. light energy → heat energy → electrical energy
C. electrical energy → heat energy → light energy
C. heat energy → electrical energy → light energy
5. Which is true about light energy? *
A. Sun is the major source of light energy that nourishes life.
B. It travels in waves in a form of electromagnetic radiation.
C. It can travel in any direction.
D. All of the above.
6. Which of the following uses of heat energy is widely utilized in industries? *
A. cooking food
B. drying clothes
C. generating electricity
D. keeping the surroundings warm
7. Which of the following activities shows the importance of energy transformation at home? *
A. Burning of old tires to produce heat
B. Using solar panels to generate electricity
C. Switching on all the lights in broad daylight
D. Using microwave oven to heat food
8. How does energy transformation occur in an electric guitar? *
A. Electrical energy is converted into sound when the chords are struck.
B. Sound energy is changed into electrical when the guitar is plugged in an outlet.
C. Sound energy is changed into electrical energy when the string of the guitar is hit.
D. Electrical and sound energy cannot be transformed in an electric guitar.
9. When do you say that energy transformation has taken place in an x-ray machine? *
A. When it is plugged in an electrical outlet.
B. When it produce an image before plugging in an outlet.
C. When it is plugged in an electrical outlet and no image is produced.
D. When it is plugged in an electrical outlet and produce image on a metal
10. What would happen if you iron clothes on a weekly basis? *
A. You will get tired easily.
B. You can conserve electricity
C. You will have no more clothes to wear.
D. All of the above.
Nonse reported ​