Question 1

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

Accepted Answer

electrical to sound

Answer

heat to sound

Answer

light to sound

Answer

sound to light

Question 2

Which situation shows electrical to light energy transformation?

Accepted Answer

Turning on a lamp.

Answer

Switching on an aircon.

Answer

Lighting a matchstick.

Answer

Reheating food using a gas stove.

Question 3

Which appliance below can transform electrical to light energy?

Accepted Answer

light bulb

Answer

hand mixer

Answer

radio

Answer

blender

Question 4

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?

Accepted Answer

Electrical energy can change to light energy.

Answer

Heat energy can change to electrical energy.

Answer

Electrical energy can change to sound energy.

Answer

Heat energy can change to light energy.

Question 5

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?

Accepted Answer

Turnoff the appliances when they are not in use.

Answer

Use the appliances at the same time.

Answer

Turn on the TV while using the laptop.

Answer

Iron clothes every day.

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