Class-5 Science -The Power of Sound

 

The Power of Sound


1. Answer the following.

a. What is sound?

Ans- Sound is a form of energy which is produced as a result of vibration.

 

b. What are warning sounds?

Ans- The sounds that are used to alert people of an emergency or danger are called as warning sound.

Example- Police siren, siren of fire engine

 

2. What does the following sound help for?

a. Fire alarm

It warns people to exit the building on time in case of fire. 

 

b. Ambulance siren

It alerts people to give way to the vehicle on the road so that it reaches the patient or transfers the patient to the hospital.

 

3. Give reasons for the following.

a. Loud speakers should be avoided at night.

Ans- Loud speakers should be avoided at night because the loud sound causes hampered sleep, irritation, stress etc. among people. 

b. Industries should be built away from the residential areas.

Ans- Prolonged exposure to the noise from industries causes many health issues like hearing loss, high blood pressure and hypertension among the residents living nearby. Therefore, industries should be built away from the residential areas.

c. Vehicles should be kept in good working condition.

Ans- Vehicles should be kept in good working condition so that there is minimal noise from them.


4. Identify the sound produced by the following and classify them as pleasant or unpleasant.

Waterfall - rumble - pleasant

Baby - cry - unpleasant

Bird- chirping - unpleasant

Rocket - thunder - unpleasant

Headphone - music - pleasant

loudspeaker - loud sound - unpleasant

 

5. Answer in one word.

a. A siren which warns the vehicles on the road to allow the police vehicle to pass through.

Police siren

b. Sound that is shrill to our ears and makes us unhappy.

Unpleasant sound

c. A vehicle that takes sick people to and from hospitals.

Ambulance

d. Use of this should be restricted in public places.

Loud speaker

e. A vehicle that is used to put out any fire that has gone out of control.

Fire Engine

 

6. Unscramble the letters to find the words.

a. RASE (part of the body we use to hear) -  EARS

b. RSIEN (an ambulance used this to make a louder sound) - SIREN

c. BVIARONTI (the movement that produces sound) - VIBRATION

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