Sound and noise

Voice box in humans is called _______

Select the objects which make pleasant sound. (more than one is correct)

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What causes noise pollution?

• Birds chirping

• Vehicles continuously honking on the road

• Loud Music

• Leaves rustling

How many vocal chords are there in the voice-box?

• 7

• 2

• 3

_____ is the voice-box of the Human Body.

• Hacynx

• Larynx

• Barlynx

What is vibration?

• how loud a sound is

• the back and forth movement of the object

• how high or low a sound is

• the loudness or softness of a sound

What is a Decibel (dB)?

• a unit for how long a thing is

• a unit for how loud a sound is

• a unit for how heavy a thing is

Sound is a form of? 

• energy
• pitch
• volume

Sound is caused by....

• molecules
• vibrations
• people
• space

What is produced when an object vibrates?

• Noise

• Sound

• Movement

• None of these