16. The time taken for a sound wave to complete one full cycle is called its:
a) Amplitude
b) Frequency
c) Wavelength
d) Period
Answer: d) Period
17. When two sound waves of the same frequency and amplitude meet, they can create a:
a) Constructive interference
b) Destructive interference
c) Standing wave
d) None of the above
Answer: a) Constructive interference
18. The bending of sound waves as they pass through different mediums is known as:
a) Reflection
b) Refraction
c) Diffraction
d) Absorption
Answer: b) Refraction
19. The phenomenon of a sound wave spreading out as it passes through an opening or around an obstacle is called:
a) Reflection
b) Refraction
c) Diffraction
d) Absorption
Answer: c) Diffraction
20. The frequency of a sound wave determines its:
a) Pitch
b) Loudness
c) Speed
d) Wavelength
Answer: a) Pitch
