WBBSE Solutions For Class 6 Geography Chapter 9 Noise Pollution

WBBSE Class 6 Geography Chapter 9 Noise Pollution Long Answer Type Questions

Question 1. Discuss the different sources of noise pollution.
Answer:

The different sources of noise pollution:

The different sources of noise pollution can be classified into two groups—natural sources and artificial sources.

Natural sources:

1. Thunder: Intense rumbling of thunder causes noise pollution.
2. Volcanic eruption: Exploding sounds from volcanic eruptions cause noise pollution.
3.  Other Sources: Sounds of waterfalls and flowing rivers also cause water pollution.

Vehicles: Vehicles are one of the main sources of noise pollution. With the increase in population, the number of vehicles plying on the roads has increased.

Read And Learn More WBBSE Solutions For Class 6 Geography

Buses, lorries, cars, autos, and other vehicles make noise with their engines as well as their horns. Noisy, high-powered motorbikes have become a common nuisance.

The take-off and landing of airplanes are other sources of noise pollution for those in the vicinity. Jet planes and helicopters are major contributors to noise pollution.

Whistles of trains as well as whistles of ships at docks and ports also cause noise pollution.

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2. Industries: Factories that use heavy machinery create a lot of noise. Moreover, the sound of huge generators and sirens present in industrial plants is a major source of noise pollution.

3. Noisy fights or parties at home: Noisy fights or parties at home are generally a major source of noise pollution for the neighbors. Household discipline should be maintained so that a calm living atmosphere can be created.

4. Social and entertainment programs: Recreational and cultural programs are a major source of noise pollution.

At family and social gatherings like weddings, festivals, meetings, and processions, indiscriminate and uncontrolled use of microphones and loudspeakers cause noise pollution.

Also, sometimes firecrackers burst during certain occasions which also causes noise pollution.

WBBSE Class 6 Effects of Noise Pollution Notes

Question 2. What are the probable effects of noise pollution?
Answer:

The probable effects of noise pollution:

Noise pollution can cause both physical and mental disorders.

They are described below—

Deafness: Noise pollution can permanently damage the human ear. The tympanum or eardrum can get punctured as a result of loud sounds or noise which can result in deafness.

Exposure to sound levels above 120 decibels for a prolonged period of time can cause pain in the ears. Different kinds of sound can interrupt normal hearing processes.

2. Irritation: Loud or continuous sound may cause irritation and restlessness in a person.

3. Lack of efficiency: A person may feel tired if exposed to noise pollution for long. As a result, the person might lose concentration which leads to a lack of efficiency at work.

4. Effect on the heart: Sudden, loud noises can cause the heart rate and blood pressure to shoot up causing further complications.

5. Effect on nerves: High-pitched noises can permanently affect memory and can also cause restlessness and other nervous disorders.

As a result, the person may suffer from insomnia. Moreover, prolonged exposure to noise pollution may result in eye ailments.

Question 3. What preventive measures can be taken to control noise pollution?
Answer:

Preventive measures needed to control noise pollution are as follows—

Motor vehicles should be installed with high-quality silencers.

Earmuffs and earplugs should be used in places with high-intensity noise.

Noise-making obsolete heavy machinery should be replaced by more sophisticated ones that would produce lesser noise. Also, types of machinery and tools should be oiled to reduce the noise.

The volume of radios, televisions, music systems, and home theatres should be regulated to a tolerable level.

At family and social gatherings like weddings, festivals, meetings, and processions, indiscriminate and uncontrolled use of microphones and loudspeakers should be controlled.

Also, firecrackers that burst during occasions and festivals should be monitored and controlled by strict legal restrictions.

Making any noise in designated silent zones such as near hospitals and schools should be made a punishable offense.

Devices to reduce the intensity of sound must be used in cinema halls and auditoriums.

Short Questions on Effects of Noise Pollution

Trees should be planted by the sides of busy roads.

Awareness initiatives about the harmful effects as well as the various causes of noise pollution must be spread at all levels of society through the help of mass media.

Since noise pollution harms the individual, society and the nation, strict laws should be formulated by the government.

Question 4. What do you mean by decibel?
Answer:

Decibel:

Decibel is the unit used to measure the intensity of sound. Decibel or dB is one-tenth of a Bel—the unit named in honor of Alexander Graham Belland is more commonly used.

Sounds in the range of 20-65 decibels are not considered noise. However, when the intensity of a sound is above 65 decibels,

It is considered noise and when this level crosses 120 decibels, it causes discomfort and disturbance to human beings and animals and is considered noise pollution.

Question 5. Which type of sound is audible to human beings?
Answer:

Type of sound is audible to human beings:

An object vibrates to create waves. Depending on the wavelength, different sound frequencies are created. The frequency of sound that normal human beings can hear, ranges between 20-20,000 hertz.

A frequency higher or lower than this cannot be heard by normal human beings. So this range of frequency that can be perceived by the normal human brain is referred to as an audible sound to humans.

Common Questions About Health Risks of Noise Pollution

Question 6. The nature of noise pollution is different in villages and cities. Make a comparative chart based on this difference.
Answer:

The nature of noise pollution is different in villages and cities.:

Question 7. How do vehicles cause noise pollution?
Answer:

Vehicles cause noise pollution:

Vehicles are one of the main sources of noise pollution. With the increase in population, the number of vehicles plying on the roads has increased.

Buses, lorries, cars, autos, and many such vehicles make noise with their engines as well as their horns. Noisy, high-powered motorbikes have become a common nuisance.

The take-off and landing of airplanes are other sources of noise pollution for those in the vicinity. Whistles of trains as well as whistles of ships at docks and ports are also causes of noise pollution.

Question 8. How are domestic gadgets responsible for noise pollution?
Answer:

Domestic gadgets responsible for noise pollution:

Domestic gadgets like mixer grinders and vacuum cleaners create a low grade of noise pollution.

Apart from these, television sets, radios, and music systems on high volume also cause noise pollution. This mostly affects infants, young children, and the elderly members of the family.

Practice Questions on Noise Pollution Prevention

Question 9. How do cultural and entertainment programs contribute to noise pollution?
Answer:

Cultural and entertainment programs contribute to noise pollution:

Recreational and cultural programs are another source of noise pollution.

At family and social gatherings like weddings, festivals meetings, and processions, indiscriminate and uncontrolled use of microphones and loudspeakers causes noise pollution.

Also, sometimes firecrackers burst during certain occasions which also causes noise pollution.

Question 10. Why are firecrackers a nuisance and a danger in terms of noise pollution?
Answer:

Firecrackers a nuisance and a danger in terms of noise pollution:

While firecrackers are burst during festivals and on different occasions their indiscriminate use is a serious source of noise pollution.

Class 6 Geography Question Answer WBBSE

This happens in the following ways—

The noise of firecrackers causes great discomfort to infants, young children, the elderly, and patients as well as pet animals.

The sudden sound of firecrackers can cause the heart rate and blood pressure to shoot up and can even cause heart attacks.

Loud noises can also cause harm to pregnant women.

Question 11. Fill in the knowledge hive with information on the various sounds.

Answer:

1. Sound of whispering and falling of dry leaves is 20 decibels.
2. Sound within the premises of the house is 40 decibels.
3. Sound made by vehicles on a busy road is 80 decibels.
4. Sound of the motor horns and generators is 90 decibels.
5. Whistle of a train is 100 decibels.
6. Sound of bursting firecrackers results in 120-decibel noise.

Question 12. Crossword

Clues:___________________

Down:

2. This is a natural source of noise pollution.
3. This is an unwanted and unpleasant sound.
5. This is the inability to hear.

Across:

1. The sound made by this is almost 140 decibels.
4. This is a major source of noise pollution from vehicular origin.
6. This protects our ears from noise pollution.

Interpretation and Application: This segment will test whether the students have understood the topics or whether they are just mugging up.

Question 13. Identify the sources of noise pollution within the room and write them down. What steps can you take to reduce this pollution?
Answer:

Careless household activities cause noise pollution.

The sources of noise pollution within the room are as follows—

1. High volume generated from radio, television, music systems, and home theatres,
2. Faulty water pumps,
3. Poorly maintained electric fans and other electrical appliances,
4. Noisy quarrels or parties at home.

Important Definitions Related to Noise Pollution Control

Preventive measures can be adopted easily to control noise pollution at home. They are as follows—

1. Regulate the volume of the radio, television, music systems, and home theatres to a tolerable level.
2. Proper maintenance of water pumps, electric fans, and other electrical appliances.
3. Maintaining household discipline, so that a calm living atmosphere is maintained.

WBBSE Class 6 Geography Chapter 9 Noise Pollution Short Answer Type Questions

Question 1. What are the immediate effects of noise pollution?
Answer:

Some of the immediate effects of noise pollution are as follows—

1. Loud sounds can damage the tympanum or eardrums, causing temporary loss of hearing.
2. Exposure to sound levels above 120 decibels for a prolonged period of time can cause pain in the ears.
3. Different kinds of sound can interrupt normal hearing processes.

Question 2. What are the long-term effects of noise pollution on human beings?
Answer:

The permanent or long-term effects of noise pollution on human beings are as follows—

1. Noise pollution can permanently damage the human ear. The tympanum or eardrum can get punctured as a result of loud sounds or noise which can result in deafness.
2. Sudden, loud noises can cause the heart rate and blood pressure to shoot up, causing further complications.
3. High-pitched noises can permanently affect memory and can also cause restlessness and other nervous disorders.

Question 3. How do industries cause noise pollution
Answer:

Industries cause noise pollution:

Industries like engineering plants for machinery and heavy tools, textile mills, newspaper presses, and others use machinery that produces sounds of high volume and or high pitch for a prolonged time.

This causes discomfort as well as long-term ill effects for not only the workers in the factory but also the people of the neighboring areas.

Question 4. What is meant by sound?
Answer:

Sound:

A sound is a form of energy that produces sensation in the ears. As an object vibrates, it creates to-and-fro movements in the particles adjacent to it and thus sound waves are formed.

After propagating through any medium, these waves vibrate the ear membrane and produce a sensation. If our brain can perceive this wave, it becomes an audible sound for us.

Question 5. What is noise pollution?
Answer:

Noise pollution:

When sounds become intolerable, painful, and irritable to human beings, it causes noise pollution.

Sound is classified as noise pollution when it disturbs and disrupts the normal course of daily activities and causes discomfort and pain. This can be due to high volumes, high pitch, long duration, or any combination of these three factors.

Question 6. Why is noise pollution higher in urban areas?
Answer:

Noise pollution higher in urban areas:

The main sources of noise pollution are vehicular traffic and factories. These are more common in cities and towns than in rural areas.

Question 7. You must have noticed the Silence Board hung near schools hospitals and other institutions. What does it signify?
Answer:

The Silence Board signifies that it is legally forbidden to blow horns near schools, colleges, hospitals, courts, and other administrative institutions.

Question 8. Name any four disorders caused by noise pollution.
Answer:

Four disorders caused by noise pollution are—

1. Deafness,
2. High blood pressure,
3. Insomnia and
4. Heart diseases.

Question 9. Make a list of sounds that are pleasing and others that are harsh on your ears.
Answer:

Aesthetics and Creativity: This segment will check the aesthetic sense and creativity of the students.

Examples of Effective Noise Control Measures

Question 10. Make a map of noise pollution yourself. Move out of your house with the elders and look around your place. Find out what types of sounds are produced and where.

Come back home and draw a map of your area. Color different portions of this map according to intensities found and prepare a map of noise pollution in your area.

Answer:

WBBSE Class 6 Geography Chapter 9 Noise Pollution Very Short Answer Type Questions

Question 1. What is the unit to measure the intensity of sound?
Answer: Decibel.

Question 2. What is the highest level of sound that the human ear can tolerate?
Answer: 65 decibels.

Question 3. Which instrument is used to measure the Smsral intensity of sound?
Answer: Decibel meter.

Question 4. Which kind of pollution is responsible for deafness in human beings?
Answer: Noise pollution.

Question 5. Which type of pollution causes heart diseases and gastric and digestive problems?
Answer: Noise pollution.

Question 6. Which sound has the highest intensity?
Answer: The sound of a siren (130 dB).

Question 7. Give an example of an irritable sound.
Answer: Sound of a siren.

Question 8. Name one natural cause of noise pollution.
Answer: Sound of lightning.

Question 9. Which is the main source of noise pollution in urban areas?
Answer: Vehicular traffic.

Question 10. What is the intensity of sound emitted by jet planes flying at a distance of 300 m?
Answer: 100 decibels.

Question 11. What is hung near schools, hospitals, and other institutions?
Answer: Silence Board.

Question 12. Name two places where blowing horns is strictly prohibited by law.
Answer: Schools and Hospitals.

Question 13. What happens if a person is exposed to prolonged high-volume sound?
Answer: The capability to hear will get reduced.

Question 14. What is an earplug?
Answer: A device used to minimize noise pollution.

Question 15. Thermometer: Graham Bell: Decibel: Decibel meter
Answer: Thermometer (not related to noise pollution)

Question 16. Thunder: Sound from factories: Normal conversation: Sound of breaking concrete
Answer: Normal conversation (do not cause noise pollution)

Question 17. The chirping of birds: Sound of a siren: Sound of a flute: Melodious music
Answer: The sound of a siren (causes noise pollution

Question 18. Television: Loud quarrel: Mixer-grinder: Vehicular traffic on a busy road
Answer: 4. Vehicular traffic on a busy road (not a source of domestic noise pollution)

Question 19. Hearing impairment: Heart disease: Nervous disorder: Skin disease
Answer: Skin disease (not an effect of noise pollution)

Question 20. A sound with a level of more than 65 decibels is pleasurable to human ears.
Answer: Disturbing

Question 21. People living in urban areas remain healthy due to noise pollution.
Answer: Fall sick

Question 22. The honking of horns is permissible in front of schools and hospitals.
Answer: Not permissible

Question 23. Highways should always be routed from within the city.
Answer: Outside

Question 24. I am the instrument used to measure the frequency of sound. I was named after Sir Alexander Graham Bell. Who am I?
Answer: Decibel Meter

Question 25. I am used in cultural programs to amplify sound. Who am I?
Answer: Microphone

Question 26. 1 am an object whose use is forbidden but I am still used during festivals and weddings. Who am I?
Answer: Firecracker

Question 27. I am a device that regulates the volume of sound that is used in cars. Who am I?
Answer: Silencer

Question 28. I am a board hung in zones where silence should be maintained, such as around schools and hospitals. Who am I?
Answer: Silence Board

Question 29. l am a disorder that can be caused by noise pollution and you cannot sleep because of me. Who am I?
Answer: Insomnia

Question 30. I am a plug-like device used to limit noise reaching the ears. I am used by workers in developed countries. Who am I?
Answer: Earplugs

WBBSE Class 6 Geography Chapter 9 Noise Pollution Fill In The Blanks

Question 1. The name of the unit for sound, the Bell unit, has come from the name of______________
Answer: Alexander Graham Bell

Question 2. The safe level of sound as decided by the World Health organisation is ______________ decibels.
Answer: 65

Question 3. The instrument used to measure the intensity of sound is ______________
Answer: Decibel meter

Question 4. The main source of noise pollution in urban areas is______________
Answer: Vehicular traffic

Question 5. The intensity of a whispering sound is______________ decibel.
Answer: 20

Question 6. The intensity of the lowest audible sound is______________
Answer: 0 decibel

Question 7. The intensity of the sound of lightning is______________ decibels.
Answer: 110

Question 8. The intensity of loud music is ______________ decibels.
Answer: 90

Question 9. Human beings feel physically and mentally uneasy if the intensity of the sound crosses______________ decibels.
Answer: 65

Question 10. Deafness occurs because of ______________ pollution
Answer: Noise

Question 11. Insomnia is caused by pollution ______________
Answer: Noise

Question 12. Burning firecrackers can cause ______________ pollution.
Answer: Noise

Question 13. Exposure to ______________ sounds can cause noise pollution.
Answer: Monotonous

Question 14. ______________ should be planted around schools, hospitals and houses to reduce noise pollution.
Answer: Trees

Question 15. We can save ourselves from noise by using ______________
Answer: Earplugs

WBBSE Class 6 Geography Chapter 9 Noise Pollution True Or False

Question 1. The sound within the premise of a house is 40 decibels.
Answer: True

Question 2. Noise pollution is lower in urban areas than in rural areas.
Answer: False

Question 3. One should honk horns loudly near hospitals.
Answer: False

Question 4. Planting trees around schools, hospitals and houses can lessen noise pollution.
Answer: True

Question 5. Noise pollution can cause nervous disorders.
Answer: True

Question 6. There is no need for regulatory laws to control noise pollution.
Answer: False

Question 7. Oiling of machinery and tools reduces the noise they make.
Answer: True

Question 8. Cinema halls have devices that reduce the intensity of sound.
Answer: True

Question 9. The chirping of birds is a source of noise pollution.
Answer: False

Question 10. The intensity of sound decreases when the distance between the listener and the source of the sound increases
Answer: True

WBBSE Class 6 Geography Chapter 9 Noise Pollution Scrambled words

1. LUPOLSENOITION
2. CIBELDE
3. TORCLEMOCY
4. UDEAKERLOSP
5. CERLENSI

Answer:

1. NOISE POLLUTION
2. DECIBEL
3. LOUDSPEAKER
4. MOTORCYCLE
5. SILENCER

WBBSE Class 6 Geography Chapter 9 Noise Pollution Match The Following Columns

Question 1.

Answer: 1-F,2-D,3-E,4-B,5-A,6-C