Assessment Directions: Choose the letter of your answer and write it in your Science answer sheets. 1. On the decibel scale, an increase of 1 dB means that sound intensity is increased by a factor of A. 10 B. 20 C. 100 D. 200 2. 5. It is a wave which is distorted or unpleasant sound to the senses. A Loudness B. Noise C. Pitch D. Timbre 3. A low frequency sound has a pitch A low B. high C. moderate D. strong 4. It is an extremely low vibrational frequency. A. Infrasonic frequency B. Supersonic frequency C Megasonic frequency D. Ultrasonic frequency 5. What is the SI unit of frequency? A Hertz B. Meter C. Meter per second D. Second 6. Which of the following is the syinbol used for wavelength? B. v D. 2 7. What is the lowest point of a transverse wave? A Compression B. Crest C. Rarefaction D. Trough 8. It refers to the distance in which the wave travels per unit time. A. Amplitude B. Frequency C. Wavelength D. Wave speed 9. It refers to the highness or lowness of sound. A Loudness B. Noise C. Pitch D. Timbre 10. It is a vibrational frequency beyond 20 000 Hz. A Infrasonic frequency C. Supersonic frequency B. Megasonic frequency D. Ultrasonic frequency
