Assessment
Choose the letter of the correct answer. Write your answers on a separate
sheet of paper
1. Which of the following factors does the speed of sound depend?
A. density
B. elasticity
C temperature
D. all of the above
2. An echo occurs when a sound wave is
A. absorbed
B. reflected
C. refracted
D. transmitted
3. What happens to the speed of sound as the temperature increases?
A. constant
B. decreases
C. increases
D. cannot be determined
4. Which phenomenon explains why sound is heard at longer distances at night
than in day?
A. echolocation
B. reflection
C. refraction
D. reverberation
5. How fast does sound travel if the air temperature is 20 °C?
A. 334 m/s
B. 340 m/s
C. 343 m/s
D. 345 m/s​