SOUND ENERGY-ENERGY PRODUCED FROM A VIBRATING OBJECTS, IT IS AN ENERGY THAT CAN BE PERCEIVED BY THE EAR.

Choose and write the letter of the correct answers on a separate sheet of paper.
1. In which medium does sound travel fastest?
A. air
B. empty space
C. liquid
D. solid
2. How do the vibrations of the particles behave when sound travels through solids?
A. cannot be determined C. occur moderately
B. occur fast D. occur very slowly
3. How does sound travel through air?
A. very fast
B. very slowly
C. in jumping motion
D. fast in random manner
4. Which refers to the pitch of the sound or the distance of each wave from one another?
A. amplitude
B. frequency
C. volume
D. wavelength
5. What do you call the undesirable sound which disturbs the activities of human or animal life?
A. energy C. sound
B. noise D.volume
6. Which refers to the sound wave that bounces back?
A. echo C. noise
B. loud D. volume
7. Lohan is walking into an empty gym. He yells inside the gym and hears an echo. What do you think is the reason?
A. The gym walls are really clean.
B. The gym walls are soft and uneven.
C. The sound waves are being absorbed by the hard smooth walls.
D. The sound waves are bouncing off the hard smooth gym walls.
8. Why does cupping your hands around your mouth when you shout make the sound travel farther?
A. You are screaming.
B. Your voice gets louder.
C. The sound spreads out.
D. The sound energy is directed in one direction.
9. Why does sound become weaker or fainter as it moves away from the observer?
A. The sound is lowered by the operator.
B. The sound spreads to cover a larger area.
C. The sound spreads to cover a smaller area.
D. The sound is already absorbed by the environment.
10. Which of the following statements is TRUE about the characteristics of sound?
A. Sound could either be soft or loud.
B. Sound is not heard when it is exactly on the same spot as the listener.
C. The loudness of sound increases as it moves away from the observer.
D. The loudness of sound decreases as it moves nearer the observer.
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