Sound and Noise

Sound occur where.

• On land

• On water

• On air

• All of these

• None of these

Clock produces what kind of sound.

• Tick-Tock

• Chirping

• Whirring

• Hissing

• None of these

If there is no air we will not be able to hear sound as sound needs ____ to travel.

• Medium

• Steel

• Iron

• None of these

• Plate

Warning sound are loud sound that are used to warn people about a danger or an emergency.

• True

• False

• All of these

• None of these

Examples of warning sound.

• Guitar

• Fire alarm

• Fire engine siren

• Nothing

• All

Which sound make us feel happy ____ and which sound make us feel uncomfortable ____.

• Warning, Common

• Pleasant, Unpleasant

• No sound

• All sound

A loud and unpleasant sound that can cause physical and mental disturbances is called ____.

• Common sound

• Warning sound

• Noise

• Noise pollution

Excessive and continuous noise which impact human and animal health is called ____.

• Noise pollution

• Noise

• Pleasant

• Unpleasant

Harmful effects of noise pollution.

• Stress

• Relaxed

• Earaches

• All of these

Ways Of reducing noise pollution.

• Avoid using loudspeaker for too long and too loudly

• Use heavy carpets and curtains

• Make loud noise

• All