1) 1. Which of the following is a low-pitched sound? a) Cat meowing b) Alarm clock ringing c) Lion roaring d) Bird Chirping 2) 2. Which of the following increases the pitch of a sound made by a guitar? a) Plucking the thickest string b) Plucking the thinnest string c) Plucking the string more gently d) Plucking the string with a greater force 3) 3. The speed of sound through water is faster than the sound through __________. a) steel b) table c) air d) walls 4) 4. What is the lowest frequency that cats can hear? a) 10 Hz b) 10dB c) 45 dB d) 45 Hz 5) Read the information below and answer Questions 5 and 6. Tina was at a rock music concert. The sound were so loud that it was hurtful to her ears. 5. What could be the loudness of the sounds? a) 10 dB b) 30 dB c) 60 dB d) 100 dB 6) Read the information below and answer Questions 5 and 6. Tina was at a rock music concert. The sound were so loud that it was hurtful to her ears. 6. What instrument can she use to measure the loudness of the sounds? a) Spring scale b) Sound level meter c) Microphone d) Electronic balance 7) 7. What does a sound level meter measure? a) Volume of a sound b) Pitch of a sound c) Distance from a sound source d) Area where a sound can be heard 8) 8. Sound cannot travel through _______________________. a) a wooden table top b) water c) air d) vacuum 9) 9. Which of the following is false? a) Sound is a form of energy. b) Sound is produced only when it bounces off a surface. c) Sound is caused by the vibrations of objects. d) We hear a sound when the vibrations of air reach our ears. 10) 10. What is the unit of measurement for the loudness of a sound? a) Hertz b) Decibel c) Amplitude d) Frequency 11) 11. What range of sounds can we hear? a) Sounds that are between 20 Hz to 20,000 Hz b) Sounds that are below 20 Hz c) Sounds that are above 20,000 Hz d) Sounds that are below 20 Hz and above 20,000 Hz 12) 12. What causes a sound to have a low pitch? a) Sound wave with high frequency b) Sound wave with low frequency c) Sound wave with large amplitude d) Sound wave with small amplitude 13) 13. What causes a sound to be loud? a) Sound wave with high frequency b) Sound wave with low frequency c) Sound wave with large amplitude d) Sound wave with small amplitude 14) 14. The measurements of Sound A and B are shown in the table below. Which of the following is true? a) Both sounds have the same amplitude. b) Both sounds have the same frequency. c) Sound A is louder than Sound B. d) Sound A is has a higher pitch than Sound B. 15) 15. Which of the following does sound travel through the slowest? a) Carbon dioxide b) Glass c) Salt water d) Steel 16) 16. The measurements of Sounds Y and Z are shown in the table below. Which of the following is true? a) Sound Z is louder than Sound Y. b) Sound Z has a higher pitch than Sound Y. c) Both sounds have the same amplitude. d) Both sounds have the same frequency. 17) 17-18. Which of the following are ways to reduce noise pollution? a) Fit walls of buildings with foam padding b) Install exhaust mufflers in vehicles c) Increase the volume of sound system speakers d) Speak more loudly 18) 19-20. Study the decibel scale below. The decibel level in a rock concert is 110 dB. Which of the following are true based on the decibel scale above? a) The rock concert is louder than a busy city traffic. b) The rock concert is louder than a police siren. c) The rock concert is softer than fireworks. d) The rock concert is softer than a hairdryer.

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