Maharashtra State Board Class 6 Science & Technology Solutions Chapter 13 Sound - Digest Answers | Maharashtra Board Solutions

Maharashtra State Board Class 6 Science Solutions Chapter 13 Sound

Class 6 Science Chapter 13 Sound Textbook Questions and Answers

1. Fill in the blanks with the proper words.

Question a.
The propagation of sound does not occur through a …………...
Answer:
vacuum

Question b.
Noise pollution is a …………… issue.
Answer:
social/serious

Question c.
The sound which is disagreeable to our ears is called …………….
Answer:
noise

Question d.
Noise has adverse effects on our ……………...
Answer:
health

2. What should we do?

Question a.
The silencer of a motorcycle is broken.
Answer:

Question b.
A factory in the surrounding is producing continuous loud noise.
Answer:
Factories should be located at a proper distance away from residential areas. Authorities should be contacted who will control the decibel level.

3. Write the answers in your own words.

Question a.
What is meant by vibration?
Answer:
Vibration of an object is necessary for the production of sound. As long as the object vibrates, the sound is heard. When the vibration stops, the sound also stops.

Question b.
Explain with the help of practical examples how sound is propagated through solids.

Answer:

Question c.
What is meant by noise pollution?
Answer:
Continuous noise which has ill effects is called noise pollution.

Question d.
What measures will you take to control noise pollution?
Answer:
Measures for preventing noise pollution:

4. Complete the table.

Question a.

Answer:

Nature of sound	Unpleasant	Pleasant
1. Speaking		✓
2. Whispering		✓
3. Aeroplane Sounds	✓
4. Horns of Vehicles	✓
5. Railway Engine	✓
6. Rustling of leaves		✓
7. Neighing of a horse	✓
8. Ticking of a clock		✓

Project:

Question 1 Maharashtra Board Solution

Prepare a list of the harsh sounds mheard near your house. Write about those sounds which produce noise pollution.

Question 2 Maharashtra Board Solution

Collect information about places where loud noise is prohibited and discuss why it is so.

Class 6 Science Chapter 13 Sound Important Questions and

Solution & Step-by-Step Answer:

Fill in the blanks:

Question 1 Maharashtra Board Solution

Some sounds are ……………… and are heard easily.

Solution & Step-by-Step Answer:

block bg-white dark:bg-slate-900/80 border-l-4 border-emerald-500 rounded-r-xl p-5 my-3 shadow-xs border border-slate-200/60 dark:border-slate-800">

Solution & Step-by-Step Answer:

loud

Question 2 Maharashtra Board Solution

Some sounds are very ……………… and cannot be heard unless we listen attentively.

Solution & Step-by-Step Answer:

soft

Question 3 Maharashtra Board Solution

As long as the object ……………… the sound is heard.

Solution & Step-by-Step Answer:

vibrates

Question 4 Maharashtra Board Solution

When the vibration ……………… the sound also stops.

Solution & Step-by-Step Answer:

stops

Question 5 Maharashtra Board Solution

The intensity of sound is measured in a unit called ……………….

Solution & Step-by-Step Answer:

decibels(dB)

Question 6 Maharashtra Board Solution

The voice box is located in our ……………….

Solution & Step-by-Step Answer:

throat

Question 7 Maharashtra Board Solution

Sound travels in the form of ……………… through air, water and ……………..

Solution & Step-by-Step Answer:

waves, solids

Question 8 Maharashtra Board Solution

The sound is propagated more clearly through a ……………… than through air.

Solution & Step-by-Step Answer:

solid

Question 9 Maharashtra Board Solution

Transmission of sound occurs at a different ……………… through different mediums.

Solution & Step-by-Step Answer:

speed

Question 10 Maharashtra Board Solution

Continuous noise which may have ill effects, is called noise ……………….

Solution & Step-by-Step Answer:

pollution

Question 11 Maharashtra Board Solution

Some of the sounds that we enjoy can be a ……………… for others.

Solution & Step-by-Step Answer:

nuisance

Question 12 Maharashtra Board Solution

The vibration of an object is necessary for the ……………… of sound.

Solution & Step-by-Step Answer:

production

Answer in one sentence.

Question 1 Maharashtra Board Solution

List characteristics of sound.

Solution & Step-by-Step Answer:

Sounds are soft, loud, pleasant and unpleasant.

Question 2 Maharashtra Board Solution

What do you mean by unpleasant sounds?

Solution & Step-by-Step Answer:

The sounds by which we get annoyed are called unpleasant sounds.

Question 3 Maharashtra Board Solution

What do you mean by loud and soft sounds?

Solution & Step-by-Step Answer:

The sounds which are heard easily, are loud sounds and the sounds which cannot be heard unless we listen attentively, are soft sounds.

Question 4 Maharashtra Board Solution

Which movement is exhibited by diaphragm of a speaker and a tabla?

Solution & Step-by-Step Answer:

Diaphragm of a speaker and a tabla exhibit rapid oscillatory motion which gives rise to vibrations.

Question 6 Maharashtra Board Solution

What is source of the sound?

Solution & Step-by-Step Answer:

The object due to which sound is produced is called the source of the sound.

Question 7 Maharashtra Board Solution

What is acoustics?

Solution & Step-by-Step Answer:

The science of sound, resonance, production, propagation and effects of sound is called acoustics.

Question 8 Maharashtra Board Solution

What produces sound in living beings?

Solution & Step-by-Step Answer:

The vibration of the vocal chords in our larynx or voice box produces sound.

Question 9 Maharashtra Board Solution

On what does quality of sound depend?

Solution & Step-by-Step Answer:

Quality of sound produced in the larynx depends upon the tautness of the vocal chords.

Question 10 Maharashtra Board Solution

How is sound propagated?

Solution & Step-by-Step Answer:

The sound is propagated in the form of waves through air, water or through a solid.

Question 11 Maharashtra Board Solution

Why is sound heard more clearly through solids?

Solution & Step-by-Step Answer:

Transmission of sound occurs at a different speed through different mediums. Transmission of sound is faster through a solid than through a liquid and gas.

Question 12 Maharashtra Board Solution

What is noise?

Solution & Step-by-Step Answer:

A loud sound is harsh to ears. Such sounds produce noise.

Question 13 Maharashtra Board Solution

List the effects of very loud or continuous noise on the people.

Solution & Step-by-Step Answer:

Question 14 Maharashtra Board Solution

What is noise pollution?

Solution & Step-by-Step Answer:

Continuous noise which has ill effects is called noise pollution.

Question 15 Maharashtra Board Solution

How can we prevent noise pollution with respect to watching TV?

Solution & Step-by-Step Answer:

The volume of the TV or radio in the house should be restricted to those watching the programmes.

Explain the terms.

Question 1 Maharashtra Board Solution

Propagation of sound:

Solution & Step-by-Step Answer:

Sound is said to be propagated when sound waves spread in all directions from a source of sound.

Question 2 Maharashtra Board Solution

Medium of propagation of sound:

Solution & Step-by-Step Answer:

The substance around a source of sound through which sound waves spread is called the medium of propagation of sound.

Question 3 Maharashtra Board Solution

Which sounds do you hear during the recess in the school?

Solution & Step-by-Step Answer:

During the recess in the school, we hear.

Question 4 Maharashtra Board Solution

When there is silence in the classroom, close your eyes and sit quietly. Which sounds in your surroundings can you hear now?

Solution & Step-by-Step Answer:

Question 5 Maharashtra Board Solution

When a song is being played on a radio or a music system in the house, place your hand on its speaker. What do you feel? Put off the music. What do you feel now?

Solution & Step-by-Step Answer:

Question 6 Maharashtra Board Solution

When a metal dish falls on the floor; it makes a loud noise. What do we do to stop the noise? What is the effect of that action?

Solution & Step-by-Step Answer:

To stop the noise of metal dish falling on the floor, quickly put hand on the dish. Vibrations of the metal dish are stopped and the noise stops.

Question 7 Maharashtra Board Solution

What is it that vibrates when the sounds of sitar, bell, water tap, and breaking of a saucer, etc. are produced?

Solution & Step-by-Step Answer:

Strings of the sitar, tongs of the bell, water drops hitting the floor of the basin, pieces of saucers that hit the ground vibrate to produce the sounds.

Question 8 Maharashtra Board Solution

Take a pot full of water. Strike it lightly on the rim. What do you see? Why are waves formed on the water in the pot?

Solution & Step-by-Step Answer:

Question 9 Maharashtra Board Solution

On rubbing balloon filled with water and another filled with air, of which balloon do we hear a clear or sound?

Solution & Step-by-Step Answer:

We hear a clearer sound of the water balloon.

Question 10 Maharashtra Board Solution

If a bell is rung in a vacuum container, will its sound be heard outside?

Solution & Step-by-Step Answer:

Its sound will not be heard outside.

Observe and Discuss.

Observe the figure and answer the questions.

Question 1 Maharashtra Board Solution

Which of these sounds is pleasant?

Solution & Step-by-Step Answer:

The singing of the girl is a pleasant sound.

Question 2 Maharashtra Board Solution

Which sound is a nuisance to people?

Solution & Step-by-Step Answer:

Observe the figure and answer the following.

Question 1 Maharashtra Board Solution

Make a list of all sounds implied in the picture.

Solution & Step-by-Step Answer:

Question 2 Maharashtra Board Solution

How would this atmosphere affect a person who is not feeling well?

Solution & Step-by-Step Answer:

This atmosphere is not convenient for a patient who is ill. He cannot take rest.

Question 3 Maharashtra Board Solution

Would you be able to study in these conditions?

Solution & Step-by-Step Answer:

No, students cannot study in this condition. They cannot concentrate on their study.

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Chapter 12 Simple Machines

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Chapter 14 Light and the Formation of Shadows

Chapter 13 Sound Solutions