5. Justin scrubs the floor using the coconut husk scrubber. Every time he scrubs
it produces
A. Heat- Sound Energy
C. Sound - Light Energy
B. Sound- Heat Energy
D. Light - Sound Energy
6. We are now in a modern world where in fact there were lights design that you're not
going to switch on but simply clap your hands and it will automatically on. That means that
sound energy can be transformed to
A. Heat - Light Energy
C. Electrical - Light
B. Mechanical - Light
D. Heat - Electrical
7. Based on the situation stated in number 7, what do you think enables the switch on
the light?
A. the softness of the clap
C. the sound of the clap
B. the clap itself
D. the way how the clap performed
8. Why is it important to use microphone when speaking to a big group of people?
Choose the best reasons.
1. so that the listeners can hear the spoken words clearly.
2. so that the speaker will not shout instead just calm while speaking.
3. so that the words spoken by the speaker will just fade away.
4. so that voice of the speaker will become nice to hear.​