SupriyaG

WBBSE Class 6 Geography Chapter 1 The Sun The Stars In The Sky Multiple Choice Question And Answers

Question 1. The endless firmament surrounding the earth is called—

1. Sky
2. Outer space
3. Universe

Answer: 2. Outer space

Question 2. The numerous twinkling dots of light that are visible in the night sky are—

1. Stars
2. Planets
3. Satellites

Answer: 1. Stars

Question 3. The expansion of the universe began almost—

1. 15 Billion years ago
2. 16 Billion years ago
3. 14 Billion years ago

Answer: 3. 14 Billion years ago

Read and Learn More WBBSE Class 6 Geography Multiple Choice Questions

Question 4. The bright dots and objects that exist in space are called—

1. Luminaries
2. Nebula
3. Asteroids

Answer: 1. Luminaries

Question 5. The milky way is a huge, spiral—

1. Nebula
2. Galaxy
3. Asteroid belt

Answer: 2. Galaxy

Question 6. The approximate number of stars in a milky way is—

1. 200 Thousand billion
2. 100 Thousand billion
3. 300 Thousand billion

Answer: 2. 200 Thousand billion

Question 7. The speed of light is—

1. 0.45 million km/s
2. 0.8 million km/s
3. 0.3 million km/s

Answer: 3. 0.3 million km/s

Question 8. The time taken by light from the sun to reach the earth is—

1. 8 Minutes 20 seconds
2. 10 Minutes 10 seconds
3. 15 Minutes 15 seconds

Answer: 1. 8 Minutes 20 seconds

Question 9. The brightest star in the northern sky is—

1. Venus
2. Pole star
3. Hadley’s octant

Answer: 2. Pole star

Question 10. The approximate number of stars that is visible to the naked eye is—

1. 5000
2. 3000
3. 6000

Answer: 3. 6000

Question 11. The constellation visible in the winter night sky is—

1. Orion
2. Big dipper
3. Cassiopeia

Answer: 1. Orion

Question 12. With a powerful telescope, one can see stars that are billion light years away.

1. 1
2. 2
3. 3

Answer: 2. 2

Question 13. The estimated age of the Sun is—

1. 2.5 billion years
2. 1.6 billion years
3. 4.5 billion years

Answer: 3. 4.5 billion years

Question 14. The Sun is a million times larger than the Earth.

1. 1
2. 1.8
3. 1.3

Answer: 3. 1.8

Question 15. The temperature inside the Sun is about—

1. 15 million°C
2. 50 million°C
3. 100 million°C

Answer: 1. 50 million°C

Question 16. Solar storms flare up every—

1. 21 years
2. 11 years
3. 5 years

Answer: 2. 11 years

Question 17. The number of dwarf planets in the solar system is—

1. 2
2. 5
3. 4

Answer: 2. 5

Question 18. The number of inner planets in the solar system is—

1. 6
2. 4
3. 5

Answer: 2. 4

Question 19. From the Earth, it seems that—

1. the Moon is smaller than the Sun
2. the Sun and the Moon are of the same size
3. the Sun is smaller than the Moon

Answer: 2. the Sun and the Moon are of the same size

Question  20. The planet nearest to the Sun is—

1. Mercury
2. Venus
3. Mars

Answer: 1. Mercury

Question 21. The bright heavenly body that can be seen in the western sky after sunset is—

1. Mercury
2. Venus
3. Pole Star

Answer: 2. Venus

Question 22. Venus rotates around its axis.

1. clockwise
2. anticlockwise
3. undefined

Answer: 1. Clockwise

Question 23. The hottest planet in our solar system is—

1. Venus
2. Mars
3. Uranus

Answer: 1. Venus

Question 24. The high iron oxide content on the surface of Mars makes it appear—

1. reddish in colour
2. brownish in colour
3. blackish in colour

Answer: 1. reddish in colour

Question 25. The planet that takes the least time to rotate around its axis is—

1. Neptune
2. Saturn
3. Jupiter

Answer: 3. Jupiter

Question 26. The volume of Jupiter is times the volume of the Earth.

1. 1500
2. 1000
3. 1300

Answer: 3. 1300

Question 27. The largest planet in the solar system is—

1. Earth
2. Jupiter
3. Uranus

Answer: 2. Jupiter

Question 28. The coldest planet in our solar system is—

1. Jupiter
2. Mars
3. Uranus

Answer: 3. Uranus

Question 29. Uranus’s high methane content makes it appear—

1. red in colour
2. blue in colour
3. green in colour

Answer: 3. green in colour

Question 30. The planet that takes the most time to complete one revolution around the Sun is—

1. Neptune
2. Saturn
3. Uranus

Answer: 1. Neptune

Question 31. One revolution of the Moon around the Earth takes—

1. 24 hours
2. 27 days 8 hours
3. 365 days

Answer: 2. 27 days 8 hours

Question 32. The distance of the Moon from the Earth is—

1. almost 149.5 million km
2. 100 million km
3. 0.384 million km

Answer: 3. Almost 149.5 million km

Question 33. The number of people on Earth—

1. More Than 5 Billion
2. More Than 7 Billion
3. More Than 8 Billion

Answer: 2. more than 5 billion

Question 34. The spacecraft that can return to Earth from space safely is called—

1. Rocket
2. Space Shuttle
3. Jet Plane

Answer: 2. space shuttle

Question 35. India’s first artificial satellite was—

1. Rohini
2. Bhaskar
3. Aryabhatta

Answer: 3. Aryabhatta

Question 36. India’s first artificial satellite, Aryabhatta was launched in the year—

1. 1969
2. 1975
3. 1990

Answer: 2. 1975

Question 37. The rover ‘Curiosity’ landed on Mars in—

1. 2008
2. 2012
3. 2014

Answer: 1. 2008

Question 38. The first astronaut in the world was-

1. Yuri Gagarin
2. Valentina Tereskova
3. Rakesh Sharma

Answer: 1. Yuri Gagarin

Question 39. The first female astronaut in the world is—

1. Sunita Williams
2. Kalpana Chawla
3. Valentina Tereshkova

Answer: 3. Valentina Tereshkova

Question 40. Humans first landed on the Moon on—

1. 16 July 1969
2. 20 July 1969
3. 23 July 1979

Answer: 2. 20 July 1969

Question 41. The color of the sky from the Moon is—

1. Black
2. Blue
3. Pink

Answer: 1. Black

Question 42. If your weight on the Earth is 36kg, then your weight in the Moon will be—

1. 5 kg
2. 6 kg
3. 7 kg

Answer: 6 kg

WBBSE Class 6 Geography Chapter 2 Is The Earth Round Multiple Choice Questions

Question 1. In ancient times, humans used to think the earth was—

1. Spherical
2. Flat
3. Rectangular

Answer: 2. Flat

Question 2. The point at which the earth meets the sky is called the—

1. Horizon
2. Shore
3. Equator

Answer: 1. Horizon

Question 3. Eratosthenes was a geographer of—

1. Greece
2. Rome
3. Germany

Answer: 1. Greece

Class 6 Geography Question Answer WBBSE

Question 4. The greek philosopher; who concluded that the earth is round was—

1. Pythagoras
2. Aristotle
3. Ptolemy

Answer: 2. Aristotle

Read and Learn More WBBSE Class 6 Geography Multiple Choice Questions

Question 5. Pythagoras was a—

1. Greek mathematician
2. Roman philosopher
3. Indian geographer

Answer: 1. Greek mathematician

Question 6. A lunar eclipse occurs when—

1. The earth’s shadow falls on the moon
2. The moon’s shadow falls on the earth
3. The sun’s shadow falls on the moon

Answer: 1. The earth’s shadow falls on the moon

Question 7. A circular shadow is always cast by an object that is—

1. Circular or spherical in shape
2. Triangular in shape
3. Rectangular in shape

Answer: 1. Circular or spherical in shape

Question 8. If the earth was a flat disc, it would have experienced sunrise at all places—

1. At the same time
2. Different times
3. At midnight

Answer: 1. At the same time

Conceptual Questions on Earth’s Geometry

Question 9. When astronauts look at the earth from space, it appears like a—

1. Bright green ball
2. Big orange ball
3. Blue ball

Answer: 3. Blue ball

Question 10. Indian scientist who first said that the earth is spherical is—

1. C.V Raman
2. Aryabhatta
3. A.P.J Abdul Kalam

Answer: 2. Aryabhatta

Question 11. An object that is flattened at the top and bottom and bulging out in the middle is known as—

1. Sphere
2. Rectangle
3. Oblate sphere

Answer: 3. Oblate sphere

Question 12. The actual shape of the earth is—

1. Elliptical
2. Spherical
3. Geoid

Answer: 3. Spherical

Question 13. The average radius of the earth is—

1. 4,600 Km
2. 6,371 Km
3. 6,040 Km

Answer: 2. 6,371 Km

Question 14. The circumference of the earth is almost—

1. 45,000 Km
2. 50,000 Km
3. 40,000 Km

Answer: 3. 40,000 Km

Question 15. The diameter of the earth at the equator is about—

1. 12,756 Km
2. 12,714 Km
3. 12,735 Km

Answer: 1. 12,756 Km

Question 16. The difference between equatorial diameter and polar diameter is

1. 40 Km
2. 42 Km
3. 45 Km

Answer: 2. 42 Km

Question 17. The highest point on earth is—

1. Mount Everest
2. Pamir plateau
3. Siberian plains

Answer: 1. Mount Everest

Question 18. The deepest point on the earth is—

1. Mariana trench
2. Tonga trench
3. Japan trench

Answer: 1. Mariana trench

Question 19. The deepest point on earth is located in the—

1. Pacific Ocean
2. Indian Ocean
3. Atlantic ocean

Answer: 2. Pacific ocean

Question 20. The difference between the highest point and lowest point of the earth’s surface is about—

1. 20 Km
2. 30 Km
3. 40 Km

Answer: 1. 20 Km

WBBSE Class 6 Geography Chapter 1 The Sun The Stars In The Sky Introduction

1. The Sun in the day and numerous points of light including the moon at night, all are known as the celestial bodies.

2. All of the space and everything in it, including millions of stars, planets, galaxies, asteroids, dust, etc, together are known as the universe.

3. The branch of scientific study that concentrates on space and the universe, is known as astronomy. It is one of the oldest practices in science.

4. The cloud of gas and dust in outer space, seen in the night sky as an indistinct bright patch, is called a nebula.

5. A galaxy is a celestial system of millions and trillions of stars, dust, and gas. It is usually spiral or elliptical in shape.

Read and Learn More WBBSE Class 6 Geography Notes

6. The galaxy in which the Sun, the Earth, and other planets are located, is called the Milky Way.

7. The burning gaseous bodies in space that have their own light and heat are called stars.

8. Light in an airless state has a speed of about 3,000,000 km per second. At this speed, the distance covered in a year is called one light year.

9. constellation is a group of stars that makes an imaginary shape.

10. A planetarium is a dome-shaped theatre in which stars, planets, satellites, and other celestial objects are shown for educational and entertaining purposes.

11. The constellation with seven bright stars that are clearly visible in the summer night sky in the shape of T is called the Ursa Major.

12. The constellation formed by five stars in an ‘M’ or ‘W’ shape, located opposite the Ursa Major, is called the Cassiopeia.

13. The constellation shaped like a cruciform or a flying buck in the night sky is called the Cygnus.

WBBSE Solutions For Class 6 Geography	WBBSE Solutions For Class 6 History	WBBSE Solutions For Class 6 Maths
WBBSE Class 6 Geography Notes	WBBSE Class 6 History Notes	WBBSE Solutions For Class 6 School Science
WBBSE Class 6 Geography Multiple Choice Questions	WBBSE Class 6 History MCQs	WBBSE Notes For Class 6 School Science

 

14. The constellation that is clearly visible in the winter sky in the shape of a hunter is called Orion.

15. A bright star in the northern sky is called the Pole star or the Polaris.

16. A tubular instrument used to watch and study distant objects with the help of a combination of mirrors and optic lenses, is called a telescope.

Class 6 Geography WBBSE 

17. Observatory is a huge dome-shaped building used to view the sky with the help of a telescope.

18. The Sun is at the center of the solar system and other innumerable heavenly bodies like planets, satellites, asteroids, comets, etc. travel around the Sun.

19. The Sun, the Earth, and other Planets that we know about are parts of a galaxy called the Milky Way. Sun is one of the brightest yellow stars in the Milky way galaxy.

20. The dark spots visible in the interior of the Sun where the temperature is a little lower, are called sunspots.

Read And Learn More WBBSE Solutions For Class 6 Geography

21. The outermost surface of the Sun is called Corona.

22. The solar storm is a phenomenon in which plasma, gas, energy, and dust radiate from the Sun at a furious speed due to an explosion on the corona of the Sun.

23. After sunset, one of the brightest celestial bodies is seen in the western sky. It is known as the Evening star. It is also seen in the eastern sky before sunrise. It is known as the Morning star. This is actually the planet Venus.

24. A planet is a stable, dense, heavenly body that does not have its own light and revolves around the Sun in its own specified orbit.

25. Planets that are closest to the Sun are known as the inner planets.

26. Planets that are quite far from the Sun are called outer planets.

27. A dwarf planet is a nearly spherical heavenly body that has a defined orbit but cannot clear any celestial objects in its orbit.

28. Satellites are small, heavenly bodies that orbit around planets.

29. The changes in the shape of the moon from one full moon to a new moon or one new moon to the next are called the phases of the moon.

30. The length of time from one full moon to the immediate next is called a lunar month.

31. Small, rocky celestial bodies that revolve around the Sun on their own specific orbits but are too small to be called planets, are known as asteroids.

32. A luminous celestial body with a burning bright tail is known as a comet.

33. A meteor is the visible part of a meteoroid that enters into the Earth’s atmosphere due to gravitational force. When it comes in a flock to Earth, this phenomenon is known as the meteor shower.

WBBSE Class 6 Geography Universe Notes

Class 6 Geography WBBSE 

34. The travel to space by rocket for research purposes is called space travel.

35. Those who travel in space by space shuttle, are known as astronauts.

36. Space suits are clothes specially made to go into space.

37. A rocket is a type of spacecraft that can easily enter space overcoming the effect of Earth’s gravity.

38. The special type of spacecraft used by astronauts to return safely to Earth from space is called a space shuttle.

39. Satellites made by human beings that are sent to space for various purposes are known as artificial satellites.

40. The spacecraft that NASA sent to Mars for research purposes in 2012 is called Curiosity.

41. ISRO is the Indian Space Research Organisation.

42. Aryabhatta is India’s first artificial satellite which had launched on 19 April 1975 from the former Soviet Union.

43. Bhaskara I and Bhaskara II are the two other India’s artificial satellites.

44. INSAT or Indian National Satellite System is a series of artificial satellites of India.

45. India’s first spacecraft that successfully landed on the moon by the initiative of ISRO is called the Chandrayana (2008).

46. The moon is covered by the Earth’s shadow on a full moon night sometimes. Then the moon is not visible from the Earth. This is called the lunar eclipse.

47. On 16 July 1969, the spacecraft sailed from the Kennedy space center in the USA for an expedition to the moon, known as Apollo II.

WBBSE Class 6 Geography Chapter 9 Noise Pollution Introduction

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

2. Sounds that do not cause any type of physical or mental discomfort to human beings or other animals are known as musical sounds.

3. Unit for measuring the intensity of sound is called decibel (dB).

4. The instrument used to measure the intensity of sound is called a decibel meter.

Read and Learn More WBBSE Class 6 Geography Notes

5. A board depicting special signs used to control noise pollution and warn the people is known as a Silence Board.

6. A Silence Board is hung near schools, hospitals, and other institutions. This means that it is legally forbidden to blow horns near these institutions.

WBBSE Solutions For Class 6 Geography	WBBSE Solutions For Class 6 History	WBBSE Solutions For Class 6 Maths
WBBSE Class 6 Geography Notes	WBBSE Class 6 History Notes	WBBSE Solutions For Class 6 School Science
WBBSE Class 6 Geography Multiple Choice Questions	WBBSE Class 6 History MCQs	WBBSE Notes For Class 6 School Science

 

7. The highest level of sound that human ears can tolerate is 65 decibels. This value is also designated by WHO as the safe decibel level.

8. The main sources of noise pollution are vehicular traffic and industrial plants.

9. Noise pollution can cause irritation, loss of hearing, headache, and other ailments to human beings.

WBBSE Chapter 9 Noise Pollution Multiple Choice Questions

Question 1. Sound is generated by—

1. A vibrating object
2. A static object
3. A buoyant object

Answer: 1. A vibrating object

Question 2. The unit that measures the intensity of sound is—

1. Milibar
2. Decibel
3. Cusec

Answer: 2. Decibel

Question 3. Noise pollution in urban areas is—

1. Higher than rural areas
2. Lower than rural areas
3. The same as in rural areas

Answer: 1. Higher than rural areas

Read and Learn More WBBSE Class 6 Geography Multiple Choice Questions

Question 4. The main source of noise pollution in urban areas is—

1. Musical programs
2. Thunder
3. Horns of vehicles

Answer: 3. Horns of vehicles

Question 5. The intensity of the sound of a siren is near—

1. 100 Decibel
2. 130 Decibel
3. 150 Decibel

Answer: 2. 130 Decibel

Question 6. The range of the intensity of sound between whispering and general conversation is from—

1. 40-70 Decibel
2. 0-40 Decibel
3. 20-65 Decibel

Answer: 3. 20-65 Decibel

Question 7. The sound made by a jet plane at a distance of 300m is almost—

1. 100 Decibel
2. 110 Decibel
3. 140 Decibel

Answer: 1. 100 Decibel

Question 8. The permissible limit of sound decided by the government is—

1. 65 Decibel
2. 70 Decibel
3. 100 Decibel

Answer: 1. 65 Decibel

Question 9. The sound of normal conversation has an intensity of—

1. 10-20 Decibel
2. 35-60 Decibel
3. 100-200 Decibel

Answer: 2. 35-60 Decibel

Question 10. High-pitched sounds—

1. Make us happy
2. Irritate us
3. Do not have any impact on us

Answer: 2. Irritate us

Question 11. The silence board that hangs near schools and hospitals asks us to—

1. Maintain silence
2. Make loud noise
3. Maintain normal levels of sound

Answer: 1. Maintain silence

Question 12. The ‘silence zone’ around schools and hospitals covers an area of—

1. 100 Metres
2. 200 Metres
3. 500 Metres

Answer: 1. 100 Metres

Question 13. A silencer is a device that—

1. Generates sound
2. Prevents sound
3. Muffles sound

Answer: 2. Prevents sound

Question 14. The sound of television is controlled by —

1. Volume button
2. Speaker
3. Mute button

Answer: 1. Volume button

Question 15. If the distance between the source of a sound and the listener increases, the intensity of the sound will—

1. Decrease
2. Increase
3. Remain the same

Answer: 1. Decrease

Question 16. Noise pollution causes our sense of hearing to become—

1. More acute
2. Less acute
3. Stay the same

Answer: 2. Less acute

Question 17. The difference between noise pollution and other kinds of pollution is that it—

1. Lasts for a long time
2. Is short-lived and localized
3. Occurs over a large region

Answer: 2. Is short-lived and localized

Question 18. The capability to hear can reduce gradually as a result of—

1. Air pollution
2. Water pollution
3. Noise pollution

Answer: 3. Noise pollution

Question 19. One makes mistakes in jobs and does not like to work because of—

1. Exposure to prolonged, high volume and monotonous sounds
2. Exposure to prolonged low-volume and monotonous sounds
3. Exposure to prolonged musical sound

Answer: 1. Exposure to prolonged, high volume and monotonous sounds

Question 20. Which of the following is caused by noise pollution?

1. Diarrhoea
2. High blood pressure
3. Bronchitis

Answer: 2. High blood pressure

Question 21. Which of the following should we use to protect ourselves from noise pollution?

1. Earplugs and earmuffs
2. Eardrums
3. Hearing aids

Answer: 1. Earplugs and earmuffs

WBBSE Class 6 Geography Chapter 8 Air Pollution Multiple Choice Question And Answers

Question 1. Which of the following in the atmosphere protects life on Earth from the harmful ultraviolet rays of the sun?

1. O₂
2. O₃
3. H_2O

Answer: 2. O₂

Question 2. Refrigerators, air conditioners and aerosol sprays release –

1. O₂
2. CFC
3. SO₂

Answer: 2. CFC

Question 3. The thinning of the ozone layer will allow which rays to reach the earth?

1. Ultraviolet rays
2. X rays
3. Infrared rays

Answer: 1. Ultraviolet rays

Read and Learn More WBBSE Class 6 Geography Multiple Choice Questions

Question 4. Which gas emitted from supersonic jets causes harm to the ozone layer?

1. Nitrogen oxide
2. Hydrogen
3. Carbon dioxide

Answer: 1. Nitrogen oxide

WBBSE Class 6 Geography Question Answer

Question 5. Skin cancer is caused by—

1. Noise pollution
2. Air pollution
3. Soil pollution

Answer: 2. Air pollution

Question 6. Monuments made of marble such as taj mahal and victoria memorial are getting damaged due to—

1. Acid rain
2. Depletion of the ozone layer
3. Global warming

Answer: 1. Acid rain

Question 7. Acid rain is more common in—

1. Industrial areas
2. Forests
3. Farmlands

Answer: 1. Industrial areas

Question 8. Which of the following gets mixed with water during acid rain?

1. Sulphur dioxide
2. Calcium carbonate
3. Chlorofluorocarbon

Answer: 1. Sulphur dioxide

Question 9. The glass structures used to cultivate vegetables and other plants in cold countries are known as—

1. Winter houses
2. Greenhouses
3. Glasshouses

Answer: 2. Greenhouses

Question 10. Which of the following is a greenhouse gas?

1. Methane
2. Oxygen
3. Hydrogen

Answer: 1. Methane

WBBSE Class 6 Geography Question Answer

Question 11. Which of the following gases is responsible for global warming?

1. Oxygen
2. Nitrogen
3. Carbon dioxide

Answer: 3. Carbon dioxide

Question 12. Which of the following is a form of public transport?

1. Bicycle
2. Rickshaw
3. Train

Answer: 3. Train

Question 13. Which of the following modes of transport does not cause air pollution?

1. Bus
2. Diesel train
3. Electric train

Answer: 3. Electric train

Question 14. The use of alternative energy will help to—

1. Lower the level of air pollution
2. Raise the level of air pollution
3. Maintain the level of air pollution

Answer: 1. Maintain the level of air pollution

Question 15. The source of alternative energy is—

1. Hydroelectricity
2. Heat electricity
3. Solar power

Answer: 3. Solar power

Question 16. The intensity of air pollution is maximum—

1. In dense forests
2. In mountain peaks
3. Near the ground surface

Answer: 3. Near the ground surface

WBBSE Class 6 Geography Chapter 8 Air Pollution Multiple Choice Question And Answers

Question 1. When We Breathe In, What Do We Take In From The Air?

1. O₂
2. CO₂
3. NO₂

Answer: 1. O₂

Question 2. When We Breathe Out, What Do We Release Into The Air?

1. O₂
2. CO₂
3. NO₂

Answer: 2. CO₂

Question 3. Which Of The Following Is A Toxic Gas Present In The Air?

1. NO₂
2. O₂
3. H₂

Answer: 1. NO₂

Question 4. One Of The Causes Of Air Pollution Is—

1. Afforestation
2. Industrialization
3. Grazing Of Animals

Answer: 2. Industrialisation

Question 5. Which Of The Following Is A Potential Cause Of Air Pollution?

1. Population Growth
2. Planned Urbanisation
3. Afforestation

Answer: 1. Population Growth

Question 6. When We Cut Down Trees And Forests, The Percentage Of Which Gas In The Air Increases?

1. O₂
2. CO₂
3. NO₂

Answer: 2. CO₂

Question 7. An Example Of A Toxic Air Pollutant Is—

1. Oxygen
2. Carbon Monoxide
3. Nitrogen

Answer: 2. Carbon Monoxide

Question 8. Which Of The Following Is A Toxic Metal Substance That Is Released From Vehicular Smoke?

1. Mercury
2. Lead
3. Cadmium

Answer: 2. Lead

Question 9. Indoor Air Pollution Is Mainly Caused Due To—

1. Accumulation Of Wastes
2. Deforestation
3. Applying Paints On Walls

Answer: 3. Applying Paints On Walls

Question 10. Which Of The Following Is Used As A Fuel For Aeroplanes?

1. LPG
2. Diesel
3. Gasoline

Answer: 3. Gasoline

Question 11. Asthma Attacks Are Triggered By—

1. Water Pollution
2. Soil Pollution
3. Air Pollution

Answer: 3. Air Pollution

WBBSE Class 6 Geography Chapter 8 Air Pollution Notes

1. When air is polluted by different poisonous gases, chemical substances, smoke from vehicles, dust particles, and organic compounds, it causes air pollution.

2. Air pollutants are those harmful organic and inorganic substances that pollute the air.

3. The layer of ozone gas present in the upper reaches of the stratosphere is known as the ozone layer.

4. Different toxic gases (such as carbon dioxide, oxides of nitrogen, and sulfur dioxide) react with rainwater and fall upon the earth as acid rain.

5. Greenhouse is an artificial chamber made of glass and is used to cultivate vegetables and flowers in regions having a cold climate.

This glass absorbs sunlight and does not allow the heat to move out of the chamber, thereby maintaining a high temperature in the chamber.

As a result, the inner environment of the chamber remains warm and is conducive to plant growth in such climatic regions.

Read and Learn More WBBSE Class 6 Geography Notes

6. Carbon dioxide, methane, nitrous oxide, CFCs, and ozone are some examples of greenhouse gases. The presence of these gases increases the temperature of the atmosphere manifold.

7. During the daytime heat from the Sun reaches the Earth which returns to space during the night.

However, greenhouse gases like carbon dioxide, methane, nitrous oxide, and water vapor present in the air absorb some amount of this heat and radiate it back to the Earth’s atmosphere.

This leads to a rise in the temperature of the atmosphere and this phenomenon is known as global warming.

WBBSE Solutions For Class 6 Geography	WBBSE Solutions For Class 6 History	WBBSE Solutions For Class 6 Maths
WBBSE Class 6 Geography Notes	WBBSE Class 6 History Notes	WBBSE Solutions For Class 6 School Science
WBBSE Class 6 Geography Multiple Choice Questions	WBBSE Class 6 History MCQs	WBBSE Notes For Class 6 School Science

 

8. The mode of transport by which a large number of people can travel from one place to another is called mass transport or public transport such as buses, trains, trams, etc.

WBBSE Class 6 Air Pollution Notes

9. In 2007, on 31 March the residents of Sydney in Australia switched off all the lights in the city for one hour (8.00 pm-9.00 pm) to reduce the impact of global warming.

At present, citizens of almost 1000 cities in 85 countries switch off lights for one hour every year on a day in the last week of March and this is termed Earth Hour.

10. Every year 22 April is celebrated as Earth Day all over the world to create awareness among people about protecting the environment.

WBBSE Class 6 Geography Chapter 7 Weather and Climate Introduction

1. Weather refers to the atmospheric conditions (air temperature, precipitation, humidity, pressure, wind, cloudiness) of a particular place at a given point in time.

2. Climate is defined as the average weather conditions of a greater extent of the area over a long period of time, say 30-35 years.

3. Only 1 in 20 billion parts of sunlight reaches the Earth. This is known as incoming solar radiation or insolation.

4. Only 51% of the insolation heats the Earth’s surface. This is called effective solar radiation.

5. About 35% of the insolation is reflected back to outer space by clouds, dust particles, and water vapour without heating the Earth’s surface. This is called the albedo.

Read and Learn More WBBSE Class 6 Geography Notes

6. At night, almost 51% of the insolation which heats up the Earth’s surface during the day, radiates back to the atmosphere or space from the Earth’s surface. This is terrestrial radiation.

7. The process of heat transfer from the Sun, directly to the Earth’s surface and back to the atmosphere again, is called radiation.

8. The process by which heat energy is transferred from a warmer surface to some other cooler surface is called conduction. The incoming solar radiation heats up the Earth’s surface.

WBBSE Solutions For Class 6 Geography	WBBSE Solutions For Class 6 History	WBBSE Solutions For Class 6 Maths
WBBSE Class 6 Geography Notes	WBBSE Class 6 History Notes	WBBSE Solutions For Class 6 School Science
WBBSE Class 6 Geography Multiple Choice Questions	WBBSE Class 6 History MCQs	WBBSE Notes For Class 6 School Science

 

Thus, the lowest strata of air close to the Earth’s surface get heated up first. This warm air rises upwards and the cool air above settles downwards to take its place.

This cool air then gets similarly heated up and moves upwards. The process of heat transfer through the movement of air currents is known as convection.

WBBSE Class 6 Elements of Weather Notes

9. The incoming solar radiation heats up the Earth’s surface. Thus, the lowest strata of air close to the Earth’s surface get heated up first. This warm air rises upwards and the cool air above settles downwards to take its

10. Heat is an energy that can warm up any object and temperature is the measure of heat.

Class 6 Geography WBBSE

11. The difference between the maximum and the minimum temperature of any place in a day is called the diurnal range of temperature.

12. The difference between the average temperature of the coldest month and the hottest month in a year is known as the annual range of temperature.

13. The water vapour content in a particular volume of air in a place, at a particular temperature is known as the humidity of that air.

14. The pressure exerted by the air on the Earth’s surface is called air pressure.

15. The horizontal movement of air is known as the wind or airflow.

16. The measurable proportion of clouds in the sky is called cloud cover or cloudiness.

17. The moisture-laden air being light moves upwards. The temperature and air above is less and thus the moisture cools down and turns into little droplets of water. This is the process of condensation.

18. Water vapour in the air condenses around dust particles to form tiny water droplets which collectively form clouds.

Small water droplets merge with each other and become heavy droplets. These water droplets then fall as rain on the Earth’s surface under the influence of gravity.

19. The angle at which sunlight strikes the Earth’s surface is called the angle of incidence of sunlight on Earth.

20. Isotherms are imaginary lines on the Earth’s surface that connect all points on a map with equal temperatures.

21. The temperature decreases gradually from the Earth to the poles due to the difference in the angle of incidence of sunlight.

The division of the Earth into three belts on the basis of the amount of heat received from the Sun is called the heat belts.

22. The region between the Tropic of Cancer and the Tropic of Capricorn on either side of the Equator is known as Torrid Zone.

23. The regions from the Tropic of Cancer to the Arctic Circle and from the Tropic of Capricorn to the Antarctic Circle in the northern and southern hemispheres respectively are known as Temperate Zones.

24. The regions from the Arctic Circle to the North Pole in the northern hemisphere and from the Antarctic Circle to the South Pole in the southern hemisphere are known as the Frigid Zones.

WBBSE Class 6 Geography Chapter 7 Weather And Climate Topic A Elements Of Weather And Climate Multiple Choice Questions

Question 1. The average weather condition at any place over a period of years is called its climate.

1. 30-35
2. 25-30
3. 20-25

Answer: 1. 30-35

Question 2. The earth receives only 1 in billion parts of the sun’s light and heat.

1. 10
2. 20
3. 30

Answer: 2. 20

Question 3. The main source of heat in the atmosphere is the—

1. Sun’s rays
2. Volcanoes
3. Waterbodies

Answer: 1. Sun’s rays

Question 4. Only % of the sun’s rays heat the earth’s surface.

1. 49
2. 51
3. 35

Answer: 2. 51

Read and Learn More WBBSE Class 6 Geography Multiple Choice Questions

Question 5. The average overall albedo of the earth is—

1. 35%
2. 51%
3. 49%

Answer: 1. 35%

Question 6. The amount of terrestrial radiation is—

1. 35%
2. 51%
3. 49%

Answer: 2. 51%

Question 7. The instrument used to measure atmospheric temperature is the—

1. Barometer
2. Thermometer
3. Hygrometer

Answer: 2. Thermometer

Question 8. Temperature is the measure of—

1. Humidity
2. Pressure
3. Heat 19

Answer: 3. Heat 19

Question 9. The freezing point of water on the Fahrenheit scale is—

1. 0° F
2. 32°F
3. 212°F

Answer: 2. 32°F

Question 10. The instrument used to measure atmospheric humidity is the—

1. Thermometer
2. Barometer
3. Hygrometer

Answer: 3. Hygrometer

Question 1. The instrument used to measure atmospheric pressure is the—

1. Thermometer
2. Nanometer
3. Fortin’s barometer

Answer: 3. Fortin’s barometer

Question 2. In winter, atmospheric pressure is—

1. Higher
2. Lower
3. The same

Answer: 1. Higher

Question 3. The instrument used to measure wind speed is the—

1. Nanometer
2. Anemometer
3. Barometer

Answer: 2. Anemometer

Question 4. The instrument used to measure wind direction is the—

1. Rain gauge
2. Anemometer
3. Wind vane

Answer: 3. Wind vane

Question 5. The process by which water vapour cools and changes its physical state to water droplets is called

1. Condensation
2. Evaporation
3. Precipitation

Answer: 1. Condensation

Question 6. Rainfall, snowfall, hail, drizzle and sleet are all forms of—

1. Precipitation
2. Cyclone
3. High atmospheric pressure

Answer: 1. Precipitation

Question 7. The instrument used to measure the amount of rainfall is the—

1. Wind vane
2. Rain gauge
3. Barometer

Answer: 2. Rain gauge

Question 8. The headquarter of the West Bengal weather department is in—

1. Alipore
2. Cossipore
3. Santoshpur

Answer: 1. Alipore

Question 9. The range of temperature in places with similar weather conditions is—

1. More
2. Less
3. Similar

Answer: 2. Less

Question 10. For every 1000 metres increase in altitude, the temperature decreases by—

1. 9.4°c
2. 6.5°c
3. 5.8°c

Answer: 2. 6.5°c

Question 11. For every 165 metres increase in altitude, the temperature decreases almost—

1. 8°C
2. 1°C
3. 9°C

Answer: 2. 1°C

Question 12. An imaginary line connecting all points on the earth with the same atmospheric temperature is called an—

1. Isobar
2. Isohyet
3. Isotherm

Answer: 3. Isotherm

Question 13. The total number of heat belts on the earth is—

1. 4
2. 2
3. 3

Answer: 3. 3

Question 14. The region between 30°-60° latitude in both hemispheres is known as the—

1. Torrid zone
2. Temperate zone
3. Frigid zone

Answer: 2. Temperate zone

Question 15. Ladakh is a—

1. Hot Desert
2. Cold desert
3. High-rainfall zone

Answer: 2. Cold desert

WBBSE Class 6 Geography Chapter 6 The Ice-Capped Continent Multiple Choice Questions

Question 1. Man first came to know about the ice-covered continent in the year—

1. 1820
2. 1920
3. 1980

Answer: 1. 1820

Question 2. The Greek word ‘Antarctica’ means-

1. The opposite of the south
2. The opposite of the north
3. The opposite of continent

Answer: 2. The opposite to the north

Question 3. Antarctica is located near the—

1. South pole
2. North pole
3. Equator

Answer: 1. South pole

Read and Learn More WBBSE Class 6 Geography Multiple Choice Questions

Question 4. Antarctica is bounded by—

1. Pacific Ocean
2. Atlantic ocean
3. Antarctic ocean

Answer: 3. Antarctic ocean

Question 5. Antarctica is the world’s continent.

1. Second-largest
2. Fourth-largest
3. Fifth-la largest

Answer: 1. Second-largest

Question 6. The area of Antarctica is equal to that of Australia—

1. Thrice
2. Twice
3. Four times

Answer: 2. Twice

Question 7. Antarctica is known as the—

1. White continent
2. Green continent
3. Dark continent

Answer: 1. White continent

Question 8. Erebus on ross island in the Antarctic is a volcano that is—

1. Active
2. Extinct
3. Dormant

Answer: 1. Active

Question 9. Antarctica is the world’s longest—

1. Mountain glacier
2. Continental glacier
3. Piedmont glacier

Answer: 2. Continental glacier

Question 10. In Antarctica, it is continuous day for—

1. 12 Months
2. 6 Months
3. 3 Months

Answer: 2. 6 Months

Question 11. The coldest, uninhabited place on earth is—

1. Oymyako
2. Verkhoyansk
3. Vostok

Answer: 3. Vostok

Question 12. Antarctica is divided into two parts by the—

1. Ross and Weddell seas
2. Trans-Antarctic mountains
3. Prime meridian

Answer: 2. Trans-Antarctic mountains

Question 13. The longest and the largest continental glacier in the world is—

1. Hubbard
2. Lambert
3. Siachen

Answer: 2. Lambert

Question 14. Antarctica is a continent that is—

1. Uninhabited
2. Sparsely populated
3. Moderately populated

Answer: 1. Uninhabited

Question 15. The bird associated with Antarctica is—

1. Peacock
2. Pigeon
3. Penguin

Answer: 3. Penguin

Question 16. The first person to set foot on the south pole was—

1. James cook
2. Roald Amundsen
3. John Davis

Answer: 2. Roald Amundsen

Question 17. The number of research stations in Antarctica is near—

1. 70
2. 50
3. 100

Answer: 3. 100

Question 18. India’s first research station in Antarctica was—

1. Maitree
2. Vostok
3. Dakshin Gangotri

Answer: 3. Dakshin Gangotri