Match the columns. 1. Wind instruments a. Vibrating string 2. Stringed instruments b. Frequency 3. Percussion instruments c. Vibrating air column 4. Pitch d. Vibrating stretched membrane 5. Loudness e. amplitude

1.Wind instruments c. Vibrating air column Wind instruments produce sound by vibrating an air column inside the hollow part of the instrument. 2. Stringed instruments a. Vibrating string String instruments produce music by vibrating string of the instrument. Violin is an example of string instrument. 3. Percussion instruments d. Vibrating stretched membrane Percussion instruments produce sound by vibrating a stretched membrane. The membrane vibrates on being struck. Tabla is an example of percussion instrument. 4. Pitch b. Frequency The pitch of a sound depends on its frequency. Pitch is directly proportional to frequency. 5. Loudness e. Amplitude Loudness depends upon amplitude of vibration. The loudness of the sound increases with an increase in the amplitude vibration. The unit of loudness is decibel. 1. Wind instruments c. Vibrating air column 2. Stringed instruments a. Vibrating string 3. Percussion instruments d. Vibrating stretched membrane 4. Pitch b. Frequency 5. Loudness e. Amplitude

E M B I B E

Living Science Physics 8>Chapter 7 - Sound>Exercises>Q C

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Pitch of a sound depends on its frequency.

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Important Questions on Sound

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Living Science Physics 8>Chapter 7 - Sound>Exercises>Q C

The pitch of a stringed instrument depends on the tension in the string.

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Living Science Physics 8>Chapter 7 - Sound>Exercises>Q C

A flute produces sound due to vibration of the air column inside it.

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Living Science Physics 8>Chapter 7 - Sound>Exercises>Q C

Music has a disturbing effect on the health and behavior of a person.

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Living Science Physics 8>Chapter 7 - Sound>Exercises>Q C

Sounds below

50 dB

cause noise pollution and are harmful.

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Living Science Physics 8>Chapter 7 - Sound>Exercises>Q C

Percussion instruments produce sound due to the vibration of thin metal strips.

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Living Science Physics 8>Chapter 7 - Sound>Exercises>Q D

Match the columns.

1. Wind instruments	a. Vibrating string
2. Stringed instruments	b. Frequency
3. Percussion instruments	c. Vibrating air column
4. Pitch	d. Vibrating stretched membrane
5. Loudness	e. amplitude