1. Which of these vibrates and produces a soft sound?
A. thunder
B. live band
C.whisper
D. an airplane taking-off

_2. Which of these are examples of loud sound? I. cry of a baby III. ring of a phone II. tweet of a bird IV. bark of a dog
A. I and II C. III and IV
B. II and III D. I and IV

_3. Which of the following will make the loudest sound?
A. dropping a pin
B. dropping a ball pen
C.dropping a clip
D. dropping a big box on the floor

_4. Which is TRUE about the characteristics of sound?
A. The loudness of sound decreases as it moves nearer from the observer.
B. The loudness of sound decreases as it moves away from the observer.
C. The loudness of sound increases as it moves away from the observer.
D. The loudness of sound does not change at all.

_5. Which of the following produces a low pitch sound?
A. Whistle
B. Police patrol car
C.scream
D. Fallen bag of cement​