Factors That Affect Sound

1. Which of the following does the speed of sound wave depend?

• A. loudness

• B. pitch

• C. temperature

• D. thickness

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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.

• B. 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.

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3. What is the speed of sound in dry air at 0 0C?

• A. 31 m/s

• B. 331 m/s

• C. 3000 m/s

• D. 300000 m/s

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4. How much is the increase in the speed of sound in the air for every 1C0 increase in temperature?

• A. 0.06 m/s

• B. 0.6 m/s

• C. 6 m/s

• D. 60 m/s

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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.

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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

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NGSS.MS-PS4-2

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

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NGSS.MS-PS4-2

9. Which room temperature of air does sound travel faster?

• A. 20 0C

• B. 23 0C

• C. 25 0C

• D. 28 0C

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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.

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