6. Which type of waves do sound waves belong to?
a) Transverse waves
b) Longitudinal waves
d) Mechanical waves
Answer: b) Longitudinal waves
7. The speed of sound waves is affected by:
a) Temperature
b) Pressure
c) Density
d) All of the above
Answer: d) All of the above
8. Which material would sound waves travel the fastest through?
a) Air
b) Water
c) Steel
d) Wood
Answer: c) Steel
9. The frequency range of human hearing is approximately:
a) 20-20,000 Hz
b) 1-10 Hz
c) 5-50,000 Hz
d) 100-1,000 Hz
Answer: a) 20-20,000 Hz
10. The phenomenon of an increase in sound intensity when a sound source approaches a listener is known as:
a) Reflection
b) Refraction
c) Doppler effect
d) Interference
Answer: c) Doppler effect
