LAURE
Choose and write the letter of the correct answer before the number.
1. Which of the following does the speed of sound wave depend?
A loudness
B. pitch
C. temperature
D. thickness
2. Which of the following is true about the effect of air temperature on the speed of
sound?
A. The lower the temperature the faster the speed.
8. The higher the temperature the faster the speed.
C. The higher the temperature the slower the speed.
D. The temperature does not affect the speed of sound.
3. A sound wave travels through the air and hits a glass of water. Which of the following happens when the
sound wave moves from the air into the glass?
A. It gets louder. 8. It gets quieter. C. It travels faster.
D. It travels slower.
4. How much is the increase in the speed of sound in the air for every 100 increase in temperature?
A. 0.06 m/s
B. 0.6 m/s
C. 6 m/s
D. 60 m/s
5. Which of the following statements is true about the speed of sound?
A. Sound travels faster in dry air than in wet air.
B. Molecules move faster so sound travels faster in warmer air,
C. Sound travels at a constant speed even if air temperature changes.
D. When comparing two media with the same phase, the sound will travel faster in a denser material.
6. Which factor does not affect the speed of sound?
A. density
B. distance
C. elasticity
D. temperature
7. Which wave property is observed when a boy shouts and hears his own voice inside the church?
A. echolocation
B. reflection
C. refraction
D. both reflection and refraction
8. Which of the following describes refraction?
A. turning back of waves
B. meeting of sound waves
C. bending of waves around edges of barriers D. changing the speed and direction of waves
9. Which room temperature of air does sound travel faster?
A. 200C
B. 23 OC
C. 25 OC
D. 28 OC
10. Which of the following explains why echo is heard in an empty gym?
A. Sound travels in waves.
B. Sound is unpredictable.
C. Sound has nowhere to go.
D. There are only hard surfaces so sound only reflects.​