Science 8 Q1 M4: Effect of Temperature to the Speed of Sound

Which of the following is true about the effect of air temperature on the speed of sound?

• The lower the temperature the faster the speed.

• The higher the temperature the faster the speed.

• The higher the temperature the slower the speed.

• The temperature does not affect the speed of sound.

What is the speed of sound in dry air at 0 degree Celsius?

• 31 m/s

• 331 m/s

• 3000 m/s

• 300000 m/s

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

• 0.06 m/s

• 0.6 m/s

• 6 m/s

• 60 m/s

Which of the following statements is true about the speed of sound?

• Sound travels faster in dry air than in wet air.

• Molecules move faster so sound travels faster in warmer air.

• Sound travels at a constant speed even if air temperature changes.

• When comparing two media with the same phase, the sound will travel faster in a denser material.

Which factor does not affect the speed of sound?

• density

• distance

• elasticity

• temperature

Which wave property is observed when a boy shouts and hears his own voice inside the church?

• reflection

• refraction

• echolocation

• both reflection and refraction

Which of the following describes refraction?

• turning back of waves

• meeting of sound waves

• bending of waves around edges of barriers

• changing the speed and direction of waves

Which room temperature of air does sound travel faster?

• 20 oC

• 23 oC

• 25 oC

• 28 oC

Which of the following explains why echo is heard in an empty gym?

• Sound travels in waves.

• Sound is unpredictable.

• Sound has nowhere to go.

• There are only hard surfaces so sound only reflects.

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?

• It gets louder.

• It gets quieter.

• It travels slower.

• It travels faster.