A student is using a cellphone to communicate with her friend. Which of the following energy transformations happen during their conversations?

A. heat to sound
B. sound to light
C. light to sound
D. electrical to sound

3. Which appliances below can transform electrical to light energy?

A. blender
B. hand mixer
C. light bulb
D. radio

4. Which of the following objects show electrical to sound energy transformation?

A. doorbell
B. flat iron
C. rice cooker
D. oven toaster

5. We use an electric kettle in boiling water. Which energy transformation takes place when you use an electric kettle?

A. light energy heat energy
B. sound energy light energy
C. electrical energ heat energy
D. heat energy electrical energy

6. Which situation shows electrical to light energy transformation?

A. Switching on an aircon.
B. Lighting a matchstick.
C. Turning on a lamp.
D. Reheating using a gas stove.

7. Hans and his parents went out for dinner. Their house was dark and when they came home, his father switched on the light in their living room. What could Hans conclude about energy?

A. Heat energy can change to light energy.
B. Heat energy can change to electrical energy.
C. Electrical energy can change to light energy.
D. Electrical energy can change to sound energy.

8. LED bulbs use less energy consumption compared to ordinary electric bulbs. Which transformation of energy happens in LED bulbs?

A. electrical to light energy
B. electrical to sound energy
C. light to sound energy
D. sound to light energy

9. Which best describes the energy transformation in a light bulb?

A. Light energy has transformed into electrical energy.
B. Mechanical energy has transformed into electrical energy.
C. Electrical energy has transformed into light and heat energy.
D. Electrical energy has transformed into heat and sound energy.

10. Electrical energy is transformed into other forms when appliances are used which could result to high electric bill. As a grade 6 pupil, how can you help conserve electrical energy?

A. Iron clothes every day.
B. Use the appliances at the same time.
C. Turn on the TV while using the laptop.
D. Turn off the appliances when they are not in use.