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

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The frequency of tuning fork depends upon its

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Important Questions on Waves and Sound

EASY

Physical and Earth Science>Relationships>Waves and Sound>Characteristics of Sound

In a shehnai, vibrations of _____ (air columns/ keys) produce sound.

MEDIUM

Physical and Earth Science>Relationships>Waves and Sound>Characteristics of Sound

A person hears two sounds one of

60 dB

100 Hz

and other of

45 dB, 700 Hz

. Which sound will the person perceive to be louder?

EASY

Physical and Earth Science>Relationships>Waves and Sound>Characteristics of Sound

Name the different types of musical instruments.

EASY

Physical and Earth Science>Relationships>Waves and Sound>Characteristics of Sound

Name two sources of sound.

EASY

Physical and Earth Science>Relationships>Waves and Sound>Characteristics of Sound

Define the characteristic of a sound that distinguishes a shrill sound from a hoarse sound.

MEDIUM

Physical and Earth Science>Relationships>Waves and Sound>Characteristics of Sound

If a stretched string is cut into half, how will the pitch of the sound produced by the vibrating string change?

EASY

Physical and Earth Science>Relationships>Waves and Sound>Characteristics of Sound

The musical instruments produce _____ (pleasant/unpleasant) sounds.

MEDIUM

Physical and Earth Science>Relationships>Waves and Sound>Characteristics of Sound

Define the term pitch.

EASY

Physical and Earth Science>Relationships>Waves and Sound>Characteristics of Sound

How are loudness and amplitude related?

MEDIUM

Physical and Earth Science>Relationships>Waves and Sound>Characteristics of Sound

The loudness of a sound depends on its amplitude. Give reason.

MEDIUM

Physical and Earth Science>Relationships>Waves and Sound>Characteristics of Sound

Prove that the pitch of a wind instrument depends on the length of the vibrating air column.

EASY

Physical and Earth Science>Relationships>Waves and Sound>Characteristics of Sound

Write two differences between loudness and pitch.

MEDIUM

Physical and Earth Science>Relationships>Waves and Sound>Characteristics of Sound

State the unit of loudness. Mention the effect of different loudness levels on human ears.

EASY

Physical and Earth Science>Relationships>Waves and Sound>Characteristics of Sound

Jal tarang is a _____.

HARD

Physical and Earth Science>Relationships>Waves and Sound>Characteristics of Sound

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