[SC F2] 10.1 Characteristics of Sound Waves

You and your father inspect an empty house with the hopes of buying it. You walk through the rooms talking to one another, and you notice that your voices and footsteps are echoing in the big, empty house. What causes the echo?

• sound waves reflecting off smooth, hard surfaces throughout the house

• sound waves moving around the large rooms

• sound waves moving slowly through air

• sound waves refracting around corners in the empty rooms

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Sound cannot travel through ________________

• water

• air

• liquids

• outer space

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Sound requires a medium to propagate.

• True

• False

Sound waves travel faster than light.

• False

• True

Good sound absorber

• marble tile

• soft board

• concrete wall

• aluminium sheet

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Which of the following is true about sound wave?

(Choose more than one)

• Cannot travel without medium

• Cannot be absorbed

• Produced by vibration

• Travel at different speed in different medium

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The following are some examples of instruments that produce sound through vibration except

• 
• 
• 
• 

Sound cannot be heard in outer space because

• sound is reflected and disappears

• sound propagates very slowly

• sound propagates very fast in vacuum

• sound needs a medium to propagate

Which of the following are good reflector of sound?

(Choose more than one)

• Marble tiles

• Wall

• Softboard

• Carpet

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Which of the following are good absorber of sound?

(Choose more than one)

• Marble tiles

• Wall

• Softboard

• Carpet

Tags

NGSS.MS-PS4-2