Class 7 Science MCQs - Chapter 24

Sound Waves Quiz Questions and Answers PDF - 27

Books:

Apps:

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Sound Waves Questions & Answers PDF Download: MCQ Quiz 27

MCQ 131: Two similar string instruments are

piano and guitar
piano and violin
guitar and violin
harp and piano

MCQ 132: Notes are put together to produce a pleasing sound known as

noise
pitch
music
phase

MCQ 133: Sounds with a high frequency which a human ear can detect are known as

infrasound
ultrasounds
high sounds
low sounds

MCQ 134: When the hand bell stimulates air particles,

temperature increases
pressure increases in the air
both temperature and pressure decreases in the air
humidity of air keeps on increasing and decreasing

MCQ 135: To avoid noise from the surroundings

soft curtains should be used
hard curtains should be used
glass windows should be used
vacuum windows should be used

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