Sound_LS_1

How is the sound produced?

• Sound is produced by vibrating objects.

• Sound is produced by the movement of clouds in the sky.
• Sound is produced by the rotation of the Earth.
• Sound is produced by the reflection of light.

Which of the following is necessary for an object to produce sound?

• A) Vibrating against a surface

• B) Emitting light waves

• C) Generating heat

• D) Absorbing sound waves

Which of the following is a key difference between a sound-making object and a silent object?

• A) A sound-making object emits light waves

• B) A sound-making object generates heat

• C) A sound-making object can be felt vibrating

• D) A sound-making object absorbs sound waves

Which part of the following instruments vibrates to produce sound?

(a) Drums:

• 1. Drumsticks

• 1. Drumhead

• 2. Drum body

• 1. Drum rim

Which part of the following instruments vibrates to produce sound?

(b) Sitar:

• 1. Sitar strings

• 1. Sitar body

• 1. Sitar bridge

• 1. Sitar frets

Which part of the following instruments vibrates to produce sound?

(c) Flute:

• 1. Flute body

• 1. Flute keys

• 1. Flute mouthpiece

• 1. Flute holes

What brings the sound of a ringing telephone bell to our ears?

• A) Vibrations of the telephone wires

• B) Vibrations of the telephone bell

• C) Vibrations of the air molecules

• D) Vibrations of the eardrums

What is the length range of vocal cords in a man?

• A) 5mm to 10mm

• B) 10mm to 17mm

• C) 17mm to 25mm

• D) 25mm to 30m

7. Out of a man and a woman:

(a) Who has shorter vocal cords?

• 1. Man

• 1. Woman

Out of a man and a woman, who has shorter vocal cords and who produces a sound of a higher pitch?

• (a) Man has shorter vocal cords and produces a sound of a higher pitch.

• (b) Woman has shorter vocal cords and produces a sound of a higher pitch.

• (c) Man has longer vocal cords and produces a sound of a higher pitch.

• (d) Woman has longer vocal cords and produces a sound of a higher pitch.