62 + Interview Questions in WINDS IN GENERAL AWARENESS Page 1 InterviewSolution

1.	Fill the missing word in the blank spaces in the following statements:(a) Wind is air.(b) Winds are generated due to heating on the earth.(c) Near the earth’s surface air rises up whereas air comes down.(d) Air moves from a region of pressure to a region of pressure.
Answer» (a) moving (b) uneven (c) warm, cooler (d) high, low

1.

Fill the missing word in the blank spaces in the following statements:(a) Wind is air.(b) Winds are generated due to heating on the earth.(c) Near the earth’s surface air rises up whereas air comes down.(d) Air moves from a region of pressure to a region of pressure.

Answer»

(a) moving

(b) uneven

(c) warm, cooler

(d) high, low

Discussion

2.	Observe the diagrams given below. Answer the questions related to sea and land breeze:i. Why do the breezes blow from the sea to the land during the day?ii. When do the winds blow from the d to the sea?iii. Describe the winds shown in fig. (a).iv. Compare fig.(a) and (b) with reference fo temperature conditions, air pressure and winds.v. Which winds are called sea breezes and which are called land breezes? Why?vi. In which part of India are land and sea breezes experienced?vii. Do you experience sea and land breezes in your area?
Answer» i. During the day as land gets heated up faster than water, an area of low pressure is created on land whereas there is a region of comparatively higher pressure on the sea. As a result the breezes blow from the sea to the land during the day. ii. The winds blow from land to the sea during the night. iii. It is sea breeze. iv. In figure (a) the temperature is higher on land & the pressure is low so winds blow from sea to land. In figure (b) the temperature is low on the land & the pressure is high. Winds blow from land to sea. v. Winds in (a) are sea breeze because they blow from the sea and (b) are land breeze because they blow from the land. vi. In India, it is experienced near the coastal areas. vii. The answer may vary.

2.

Observe the diagrams given below. Answer the questions related to sea and land breeze:i. Why do the breezes blow from the sea to the land during the day?ii. When do the winds blow from the d to the sea?iii. Describe the winds shown in fig. (a).iv. Compare fig.(a) and (b) with reference fo temperature conditions, air pressure and winds.v. Which winds are called sea breezes and which are called land breezes? Why?vi. In which part of India are land and sea breezes experienced?vii. Do you experience sea and land breezes in your area?

Answer»

i. During the day as land gets heated up faster than water, an area of low pressure is created on land whereas there is a region of comparatively higher pressure on the sea. As a result the breezes blow from the sea to the land during the day.

ii. The winds blow from land to the sea during the night.

iii. It is sea breeze.

iv. In figure (a) the temperature is higher on land & the pressure is low so winds blow from sea to land. In figure (b) the temperature is low on the land & the pressure is high. Winds blow from land to sea.

v. Winds in (a) are sea breeze because they blow from the sea and (b) are land breeze because they blow from the land.

vi. In India, it is experienced near the coastal areas.

vii. The answer may vary.

Discussion

3.	Define the following term:Roaring Forties.
Answer» Beyond 40°S winds blow with tremendous velocity. These winds are called the Roaring Forties.

Discussion

4.	Which one of the following place is unlikely to be affected by a cyclone?(i) Chennai(ii) Mangaluru (Mangalore)(iii) Amritsar(iv) Puri
Answer» (iii) Amritsar

Discussion

5.	Which of the statements given below is correct?(i) In winter the winds flow from the land to the ocean.(ii) In summer the winds flow from the land towards the ocean.(iii) A cyclone is formed by a very high-pressure system with very high-speed winds revolving around it.(iv) The coastline of India is not vulnerable to cyclones.
Answer» (i) In winter the winds flow from the land to the ocean.

Discussion

6.	Suppose you are a member of a committee, which is responsible for creating development plan of a coastal state. Prepare a short speech indicating the measures to be taken to reduce the suffering of the people caused by cyclones.
Answer» As a member of development plan committee, I will suggest that we should make arrangements to get prior information of cyclone through satellites and radars. The cyclone warning should be issued 24 hours in advance when cyclone is nearer the coast. The people living in the affected area should be educated through TV, radio and newspaper to shift the essential household goods, domestic animals and vehicles etc. to safer places. They should be requested to keep ready the phone numbers of emergency services like police, fire ‘ brigade, and medical centres. In addition to this, construction of cyclone shelters in the cyclone prone areas, and administrative arrangements for moving people fast for safer places should be made.

6.

Suppose you are a member of a committee, which is responsible for creating development plan of a coastal state. Prepare a short speech indicating the measures to be taken to reduce the suffering of the people caused by cyclones.

Answer»

As a member of development plan committee, I will suggest that we should make arrangements to get prior information of cyclone through satellites and radars. The cyclone warning should be issued 24 hours in advance when cyclone is nearer the coast. The people living in the affected area should be educated through TV, radio and newspaper to shift the essential household goods, domestic animals and vehicles etc. to safer places.

They should be requested to keep ready the phone numbers of emergency services like police, fire ‘ brigade, and medical centres. In addition to this, construction of cyclone shelters in the cyclone prone areas, and administrative arrangements for moving people fast for safer places should be made.

Discussion

7.	A curtain is hanging at the entrance of a room. A long corridor runs at right angles to the door, that is parallel to the curtain. If a strong wind blows along the corridor, the curtain will(a) get pushed inside the room.(b) get pushed outside the room.(c) get collected towards one end/swirled.(d) remain unaffected.
Answer» (b) get pushed outside the room.

Discussion

8.	Define the following term:Horse Latitudes.
Answer» In the area near the Tropic of Cancer and Tropic of Capricorn, that is between 25° and 35° north and south, there exist a high pressure belt, which is a calm belt. This belt is called as the Horse latitudes.

Discussion

9.	Define the following term:Local Winds.
Answer» The winds that blow for a short duration of time, originate in specific region and blow over a limited area are called Local Winds.

Discussion

10.	Define the following term:Doldrums.
Answer» The region up to 5° North and 5° South of the equator remains calm for most of the year and winds do not blow in this region. It is called the equatorial calm zone or Doldrums.

Discussion

11.	Define the following term:Screeching Sixties.
Answer» The stormy winds around 60°S make tremendous noise and hence they are called the Screeching Sixties.

Discussion

12.	Define the following term:Typhoons.
Answer» Storms arising in the months between June and October in the western part of the Pacific Ocean which blow with high velocity winds and heavy rains causing destruction are called Typhoons.

Discussion

13.	Define the following term:Hurricanes.
Answer» The cyclones in the Caribbean sea which are destructive in nature are called Hurricanes.

Discussion

14.	State one reason why:The air pressure in land and water is different.
Answer» (a) The land is made up of dense matter. Land is stable and opaque. As a result, heat is transferred at a greater speed and in a higher proportion. Hence, land gets heated quickly. (b) The density of water is comparatively less. Water is transparent and unstable. Hence, water does not get heated quickly. (c) As a result, the air pressure in land and water areas is different.

14.

State one reason why:The air pressure in land and water is different.

Answer»

(a) The land is made up of dense matter. Land is stable and opaque. As a result, heat is transferred at a greater speed and in a higher proportion. Hence, land gets heated quickly.

(b) The density of water is comparatively less. Water is transparent and unstable. Hence, water does not get heated quickly.

(c) As a result, the air pressure in land and water areas is different.

Discussion

15.

Distinguish between the following:Cyclones and Anticyclones.

Answer»

Cyclones	Anticyclones
(i) Cyclonic conditions are created when a low pressure area is surrounded by high pressure areas.	(i) Anticyclonic conditions are created when a high pressure area is surrounded by low pressure areas.
(ii) The cyclonic winds move in an anticlockwise direction in the northern hemisphere and clockwise direction in the southern hemisphere.	(ii) The anticyclonic winds move in a clockwise direction in the northern hemisphere and anticlockwise direction in the southern hemisphere.
(iii) The sky is cloudy.	(iii) The skies are clear.
(iv) The velocity of wind is very high and cause rain.	(iv) The velocity of wind is less and weather is pleasant.

Discussion

16.	What effect does the rotation of the earth have on the wind?
Answer» The direction of the winds is influenced by the rotation of the earth. In the northern hemisphere, winds get deflected towards the right of their original direction, whereas in the southern hemisphere they get deflected toward the left of their original direction.

Discussion

17.	Find out the odd man out and give reason for your answer:Polar winds, Local winds, Easterlies, Westerlies
Answer» Local winds – Others are names of planetary winds.

Discussion

18.	Find out the odd man out and give reason for your answer:Southeast Asia, West Europe, East Africa, North Australia.
Answer» West Europe – Others receive monsoon rains.

Discussion

19.	Suggest two methods to find out wind direction at a given place.
Answer» The following methods can be used to get the direction of wind: Take some fine and lighter sand in your hand and slowly slip it off. Movement of dust particles in a particular direction will give the direction of wind flowing. Fly a kite. In the direction the kite flies shall be the wind direction. Take bit of paper on your palm. The piece will fly in the direction of wind is blowing. Use anemometer or wind wane.

19.

Suggest two methods to find out wind direction at a given place.

Answer»

The following methods can be used to get the direction of wind:

Take some fine and lighter sand in your hand and slowly slip it off. Movement of dust particles in a particular direction will give the direction of wind flowing.
Fly a kite. In the direction the kite flies shall be the wind direction.
Take bit of paper on your palm. The piece will fly in the direction of wind is blowing.
Use anemometer or wind wane.

Discussion

20.	You want to buy a house. Would you like to buy a house having windows but no ventilators? Explain your answer
Answer» Smoke from kitchen and warm air being lighter rise up. If there is no outlet like ventilators, it will be difficult to escape for warm air and will heat up the room and could cause suffocation and discomfort.

Discussion

21.	You want to buy a house. Would you like to buy a house having windows but no ventilators? Explain your answer.
Answer» No, a house which has no ventilators is not a safe or healthy house to live in. The air circulation is not there in such a house. So, it has no fresh air. Because warm air rises up and goes out through ventilators and fresh air comes in through windows.

Discussion

22.	You want to buy a house, would you like to buy a house having windows but no ventilators? Explain your answer.
Answer» A house having windows but no ventilators should not be bought. This is because warm air is lighter than cold air and therefore, it goes up. This warm air goes outside the house mostly through ventilators. If there are no ventilators, then the warm air cannot move out easily and can cause suffocation.

Discussion

23.	State two experiences that made you think that air exerts pressure.
Answer» (i) Balloons and balls can be used only when they are inflated with air. When balloon is overfilled with air it bursts due to excessive air pressure. (ii) Compressed air is used in the brake system or stopping trains.

23.

State two experiences that made you think that air exerts pressure.

Answer»

(i) Balloons and balls can be used only when they are inflated with air. When balloon is overfilled with air it bursts due to excessive air pressure.

(ii) Compressed air is used in the brake system or stopping trains.

Discussion

24.	State two experience that made you think that air exerts pressure (other than those given in the text.)
Answer» We can experience air pressure in our daily activities such as: 1. When we blow a balloon, the balloon becomes tight. If we try to fill more air, then the balloon bursts after an extent. This happens because air exerts pressure. 2. Trees leaves and branches flutter due to pressure exerted by air in the form of wind.

24.

State two experience that made you think that air exerts pressure (other than those given in the text.)

Answer»

We can experience air pressure in our daily activities such as:

1. When we blow a balloon, the balloon becomes tight. If we try to fill more air, then the balloon bursts after an extent. This happens because air exerts pressure.

2. Trees leaves and branches flutter due to pressure exerted by air in the form of wind.

Discussion

25.	State two experiences that made you think that air exerts pressure (other than those given in the text).
Answer» We can experience air pressure in our daily activities such as: Tree leaves and branches flutter due to pressure exerted by air in the form of wind. It is difficult to ride a bicycle against the wind but it is much easier in the direction of wind.

25.

State two experiences that made you think that air exerts pressure (other than those given in the text).

Answer»

We can experience air pressure in our daily activities such as:

Tree leaves and branches flutter due to pressure exerted by air in the form of wind.
It is difficult to ride a bicycle against the wind but it is much easier in the direction of wind.

Discussion

26.	Find out the odd man out and give reason for your answer:Mistral, Bora, Chinook, Foehn
Answer» Chinook – Others originate in the Alps Mountain.

Discussion

27.	Find out the odd man out and give reason for your answer:India, Japan, China, Phillippines.
Answer» India – Others experience typhoons.

Discussion

28.	What are anticyclones?
Answer» (i) Under specific atmospheric conditions, the air pressure in a particular region increases & the pressure in the surrounding areas remain low. (ii) In this situation, winds blow from the centre towards the surrounding areas in a circular manner. (iii) In the northern hemisphere, these winds blow in a clockwise direction whereas in the southern hemisphere they blow in an anticlockwise direction. (iv) During anticyclone, the skies are clear, winds blow with lesser velocities and the weather is pleasant.

28.

What are anticyclones?

Answer»

(i) Under specific atmospheric conditions, the air pressure in a particular region increases & the pressure in the surrounding areas remain low.

(ii) In this situation, winds blow from the centre towards the surrounding areas in a circular manner.

(iii) In the northern hemisphere, these winds blow in a clockwise direction whereas in the southern hemisphere they blow in an anticlockwise direction.

(iv) During anticyclone, the skies are clear, winds blow with lesser velocities and the weather is pleasant.

Discussion

29.	Important Class 7 Science MCQ Questions of Winds, Storms and Cyclones with Answers?
Answer» Students are advised to practice the Class 7 Science MCQ Questions of Winds, Storms and Cyclones with Answers is available here. MCQ Questions for Class 7 Science with Answers are prepared as per the Latest Exam Pattern. Students can solve these Winds, Storms and Cyclones Class 7 MCQ Questions with Answers and assess their preparation level. We have formed these CBSE Class 7 Science MCQ Questions of Winds, Storms and Cyclones with Answers in view of the changed exam pattern and have sorted it chapter wise for the students to practice.This may assist you to understand and check your knowledge about the chapters. Revise all the concepts easily by taking help from the MCQ Questions for Class 7 Science with Answers. Practice MCQ Questions for Class 7 Science 1. In which year was Orissa hit by a cyclone? (a) 1999 (b) 2000 (c) 2001 (d) 2004 2. Leaves of trees, banner or flags flutter when wind is blowing. Why? (a) Air occupies space (b) Air is a mixture of gases (c) Air exerts pressure (d) Air is colourless 3. Following are precautions one must take in case a storm is accompanied by lightning. (i) Do not take shelter under a tree. (ii) Do not take shelter under an umbrella with a metallic end. (iii) Do not take shelter in open garages, storage sheds, etc. (iv) Do not take shelter in a bus in the open. Which one of these is not correct? (a) (i) (b) (ii) (c) (iii) (d) (iv) 4. Which of the following places is most likely to be affected by a cyclone? (a) Mumbai (b) Puri (c) Goa (d) Porbandar 5. A fire alarm usually detects smoke in case of fire. Where should such an alarm be placed in a room? (a) Near the door (b) On the floor (c) On any wall (d) On the ceiling 6. The winds from oceans carry water and bring rain. These winds are called (a) typhoon (b) monsoon (c) cyclone (d) none of these 7. A Cyclone alert or cyclone watch is issued_____hours in advance of any expected storm and a Cyclone warning is issued ______hrs in advance. (a) 48,24 (b) 12,48 (c) 24,48 (d) 48,12 8. How are sea and land breezes caused? (a) Through convection currents (b) Through cyclones (c) Through rains (d) Through conduction 9. Winds currents generated by uneven heating between the equator and the: (a) Moon (b) Poles (c) Sun (d) Stars 10. Lightning is usually accompanied by (a) Rain (b) Earthquake (c) Thunder (d) Floods 11. Smoke is hotter and lighter than (a) water (b) heat (c) air (d) none of these 12. Cyclones can be (a) destructive (b) useful (c) both (a) and (b) (d) none of these 13.The eye of storm is a (a) Heavy rain area (b) Calm area (c) Highly active area (d) High velocity storm area 14. The India Meteorological department forecasts cyclones with the help of: (a) Rohini satellite (b) Aryabhatta satellite (c) INSAT satellite (d) None of these 15. Wind currents are generated due to (a) uneven heating on the earth (b) even heating on the earth (c) cooling on the earth (d) none of these 16. What is an anemometer? (a) A device for measuring atmospheric pressure (b) A device for measuring wind speed (c) A device for measuring atmospheric temperature (d) A device for measuring humidity 17. Hurricane is the name of cyclone in (a) American continent (b) Japan (c) Both (a) and (b) (d) None of these 18. For escape of hot air room has (a) Ventilators (b) Windows (c) High walls (d) Doors 19. A natural hazard causing destruction is called a: (a) natural disaster (b) cyclone (c) thunderstorm (d) none of these 20. Tornado reaches (a) from the oceans to the plane (b) from the ground to the sky (c) from the sky to the ground (d) none of these 21. A violent tornado can travel at a speed of about (a) 300 km/h (b) 100 km/h (c) 50 km/h (d) 150 km/h 22. Cyclone is followed by (a) Darkness (b) Brightness (c) Flood (d) Drought 23. From where do the monsoon winds come to India? (a) Northeast (b) Northwest (c) Southeast (d) Southwest 24. A wind vane is used to measure the (a) Air humidity (b) Wind direction (c) Air pressure (d) Wind speed 25. Which of the following factors will contribute to the formation of cyclone? (a) humidity (b) Wind direction (c) Wind speed (d) All of the above Answer: 1. Answer: (a) 1999 Explanation: On October 29, 1999, a super cyclone with a wind speed of 300 mph had struck Odisha, making it probably the greatest cyclonic disaster ever recorded in the last century. 2. Answer: (c) Air exerts pressure Explanation: The pressure imposed by moving air or wind causes the leaves of trees, flags, and banners to flutter when the wind blows. 3. Answer: (d) (iv) Explanation: As we know that buses are made up of metals from outside and hence when the lighting strikes the bus it would have no effect on inside , and it does not matter what lighting does to the outside part of the bus, but for extra knowledge the real reason is lighting is a static electricity and it is different from the electricity in our home and as far as I am concerned lighting has no effect on inside of a hollow closed conductor but has effect outside and hence car is a hollow conductor and closed too , so it would have no effect. 4. Answer: (b) Puri Explanation: Puri is most likely to be affected by a cyclone because the east coast is more prone to cyclones and puri is situated on the East coast of India. 5. Answer: (d) On the ceiling Explanation: In case of fire, the air on top of the fire becomes hotter and rises up. So, an alarm should be placed on the ceiling in a room. 6. Answer: (b) monsoon Explanation: The monsoon winds carry water and it rains. 7. Answer: (a) 48,24 Explanation: A Cyclone alert or Cyclone watch is issued 48 hours in advance of any expected storm and a Cyclone warning is issued 24 hrs in advance. 8. Answer: (a) Through convection currents Explanation: All wind is caused by a pressure gradient. In the case of land or sea breeze, the pressure gradient is due to the different heating and cooling rates of the area.Lake or sea breeze and land breeze are on a comparatively small scale when viewing meteorological events. This is important to note because large scale heating and small scale heating work differently. In the case of small scale heating, the increase in heat causes an increase in volume which in turn lowers the pressure in that area. 9. Answer: (b) Poles Explanation: Wind currents are produced due to the non-uniform heating of the Earth. That means uneven heating at the equator and the poles. This warm air rises and the making up of cooler air from the regions with the 0-30 degrees latitude belt on either side of the equator moves in. This is how wind currents are being generated. 10. Answer: (c) Thunder Explanation: Thunder is caused by the rapid expansion of the air surrounding the path of a lightning bolt. As lightning connects to the ground from the clouds, a second stroke of lightning will return from the ground to the clouds, following the same channel as the first strike. 11. Answer: (c) air Explanation: Smoke is hotter and lighter than air. The India Meteorological department forecasts cyclones with the help of INSAT satellite. The heated air that rises up gets cooled and sinks which cause the convection currents. 12. Answer: (a) destructive Explanation: Cyclones can be very destructive. Strong winds push water towards the shore even if the storm is hundreds of kilometres away. These are the first indications of an approaching cyclone. 13. Answer: (b) Calm area Explanation: The eye is a region of mostly calm weather at the centre of strong tropical cyclones. In all storms, however, the eye is the location of the storm's minimum barometric pressure where the atmospheric pressure at sea level is the lowest. 14. Answer:(c) INSAT satellite Explanation: This is done with the help of the INSAT satellite and chain of Cyclone Detection Radars (CDRS) installed along the coastal belt of India. These radars can locate and track an approaching cyclone within a range of 400 km. 15. Answer: (a) uneven heating on the earth Explanation: Wind currents are produced due to the non-uniform heating of the Earth. That means uneven heating at the equator and the poles. This warm air rises and the making up of cooler air from the regions with the 0-30 degrees latitude belt on either side of the equator moves in. This is how wind currents are being generated. 16. Answer: (b) A device for measuring wind speed Explanation: The anemometer counts the number of rotations, which is used to calculate wind speed. An anemometer is an instrument that measures wind speed and wind pressure. Anemometers are important tools for meteorologists, who study weather patterns. They are also important to the work of physicists, who study the way air moves. 17. Answer: (c) Both (a) and (b) Explanation: Cyclones are called hurricanes in American continent and typhoons in Philippines and japan. 18. Answer: (a) Ventilators Explanation: Ventilators are provided in the rooms at the top of the roofs because if the air inside the room gets hot, the hot air rises up and flows through these ventilators and thus cool air remains at bottom. It brings cool and fresh air in the room. Thus ventilators maintain conventional currents to keep the air fresh in the room. 19. Answer: (a) natural disaster Explanation: Natural disasters are catastrophic events with atmospheric, geological, and hydrological origins (e.g., droughts, earthquakes, floods, hurricanes, landslides) that can cause fatalities, property damage and social environmental disruption. 20. Answer: (c) from the sky to the ground Explanation: As a tornado is a dark funnel-shaped cloud that reaches from the sky to the ground. 21. Answer: (a) 300 km/h Explanation:Tornado is a dark funnel shaped cloud that reaches from the sky to the ground. Most of the tornadoes are weak. A violent tornado can travel at speeds of about 300 km/h. Tornadoes may form within cyclones. In our country they are not very frequent. 22. Answer: (c) Flood Explanation:These strong winds can also cause a storm surge and along with heavy rainfall, that can actually cause local flooding, which can cause more damage 23. Answer: (d) Southwest Explanation: The monsoon winds that carry a lot of water to India come from the southwest direction.The monsoon is caused by differential temperature trends over the land and ocean. In India, the southwest summer monsoon is attracted by a low-pressure area that's caused by the extreme heat of the Thar Desert and adjoining areas, during summer. After the monsoon season is over, the wind direction reverses. 24. Answer: (b) Wind direction Explanation: The instrument which used to measure wind direction is called wind vane. It is generally located at the highest point of a building. This is pointed at the direction in which the wind is blowing. Wind vane is used to predict the weather of a particular place, as the direction of wind plays important role in determining weather of a place. 25. Answer: (d) All of the above Explanation: Factors like wind speed, wind direction, temperature and humidity contribute to the development of cyclones. Click here for Practice MCQ Questions for Winds, Storms and Cyclones to Climate Class 7

29.

Important Class 7 Science MCQ Questions of Winds, Storms and Cyclones with Answers?

Answer»

Students are advised to practice the Class 7 Science MCQ Questions of Winds, Storms and Cyclones with Answers is available here. MCQ Questions for Class 7 Science with Answers are prepared as per the Latest Exam Pattern. Students can solve these Winds, Storms and Cyclones Class 7 MCQ Questions with Answers and assess their preparation level.

We have formed these CBSE Class 7 Science MCQ Questions of Winds, Storms and Cyclones with Answers in view of the changed exam pattern and have sorted it chapter wise for the students to practice.This may assist you to understand and check your knowledge about the chapters. Revise all the concepts easily by taking help from the MCQ Questions for Class 7 Science with Answers.

Practice MCQ Questions for Class 7 Science

1. In which year was Orissa hit by a cyclone?

(a) 1999
(b) 2000
(c) 2001
(d) 2004

2. Leaves of trees, banner or flags flutter when wind is blowing. Why?

(a) Air occupies space
(b) Air is a mixture of gases
(c) Air exerts pressure
(d) Air is colourless

3. Following are precautions one must take in case a storm is accompanied by lightning.

(i) Do not take shelter under a tree.
(ii) Do not take shelter under an umbrella with a metallic end.
(iii) Do not take shelter in open garages, storage sheds, etc.
(iv) Do not take shelter in a bus in the open.

Which one of these is not correct?

(a) (i)
(b) (ii)
(c) (iii)
(d) (iv)

4. Which of the following places is most likely to be affected by a cyclone?

(a) Mumbai
(b) Puri
(c) Goa
(d) Porbandar

5. A fire alarm usually detects smoke in case of fire. Where should such an alarm be placed in a room?

(a) Near the door
(b) On the floor
(c) On any wall
(d) On the ceiling

6. The winds from oceans carry water and bring rain. These winds are called

(a) typhoon
(b) monsoon
(c) cyclone
(d) none of these

7. A Cyclone alert or cyclone watch is issued_____hours in advance of any expected storm and a Cyclone warning is issued ______hrs in advance.

(a) 48,24
(b) 12,48
(c) 24,48
(d) 48,12

8. How are sea and land breezes caused?

(a) Through convection currents
(b) Through cyclones
(c) Through rains
(d) Through conduction

9. Winds currents generated by uneven heating between the equator and the:

(a) Moon
(b) Poles
(c) Sun
(d) Stars

10. Lightning is usually accompanied by

(a) Rain
(b) Earthquake
(c) Thunder
(d) Floods

11. Smoke is hotter and lighter than

(a) water
(b) heat
(c) air
(d) none of these

12. Cyclones can be

(a) destructive
(b) useful
(c) both (a) and (b)
(d) none of these

13.The eye of storm is a

(a) Heavy rain area
(b) Calm area
(c) Highly active area
(d) High velocity storm area

14. The India Meteorological department forecasts cyclones with the help of:

(a) Rohini satellite
(b) Aryabhatta satellite
(c) INSAT satellite
(d) None of these

15. Wind currents are generated due to

(a) uneven heating on the earth
(b) even heating on the earth
(c) cooling on the earth
(d) none of these

16. What is an anemometer?

(a) A device for measuring atmospheric pressure
(b) A device for measuring wind speed
(c) A device for measuring atmospheric temperature
(d) A device for measuring humidity

17. Hurricane is the name of cyclone in

(a) American continent
(b) Japan
(c) Both (a) and (b)
(d) None of these

18. For escape of hot air room has

(a) Ventilators
(b) Windows
(c) High walls
(d) Doors

19. A natural hazard causing destruction is called a:

(a) natural disaster
(b) cyclone
(c) thunderstorm
(d) none of these

20. Tornado reaches

(a) from the oceans to the plane
(b) from the ground to the sky
(c) from the sky to the ground
(d) none of these

21. A violent tornado can travel at a speed of about

(a) 300 km/h
(b) 100 km/h
(c) 50 km/h
(d) 150 km/h

22. Cyclone is followed by

(a) Darkness
(b) Brightness
(c) Flood
(d) Drought

23. From where do the monsoon winds come to India?

(a) Northeast
(b) Northwest
(c) Southeast
(d) Southwest

24. A wind vane is used to measure the

(a) Air humidity
(b) Wind direction
(c) Air pressure
(d) Wind speed

25. Which of the following factors will contribute to the formation of cyclone?

(a) humidity
(b) Wind direction
(c) Wind speed
(d) All of the above

Answer:

1. Answer: (a) 1999

Explanation: On October 29, 1999, a super cyclone with a wind speed of 300 mph had struck Odisha, making it probably the greatest cyclonic disaster ever recorded in the last century.

2. Answer: (c) Air exerts pressure

Explanation: The pressure imposed by moving air or wind causes the leaves of trees, flags, and banners to flutter when the wind blows.

3. Answer: (d) (iv)

Explanation: As we know that buses are made up of metals from outside and hence when the lighting strikes the bus it would have no effect on inside , and it does not matter what lighting does to the outside part of the bus, but for extra knowledge the real reason is lighting is a static electricity and it is different from the electricity in our home and as far as I am concerned lighting has no effect on inside of a hollow closed conductor but has effect outside and hence car is a hollow conductor and closed too , so it would have no effect.

4. Answer: (b) Puri

Explanation: Puri is most likely to be affected by a cyclone because the east coast is more prone to cyclones and puri is situated on the East coast of India.

5. Answer: (d) On the ceiling

Explanation: In case of fire, the air on top of the fire becomes hotter and rises up. So, an alarm should be placed on the ceiling in a room.

6. Answer: (b) monsoon

Explanation: The monsoon winds carry water and it rains.

7. Answer: (a) 48,24

Explanation: A Cyclone alert or Cyclone watch is issued 48 hours in advance of any expected storm and a Cyclone warning is issued 24 hrs in advance.

8. Answer: (a) Through convection currents

Explanation: All wind is caused by a pressure gradient. In the case of land or sea breeze, the pressure gradient is due to the different heating and cooling rates of the area.Lake or sea breeze and land breeze are on a comparatively small scale when viewing meteorological events. This is important to note because large scale heating and small scale heating work differently. In the case of small scale heating, the increase in heat causes an increase in volume which in turn lowers the pressure in that area.

9. Answer: (b) Poles

Explanation: Wind currents are produced due to the non-uniform heating of the Earth. That means uneven heating at the equator and the poles. This warm air rises and the making up of cooler air from the regions with the 0-30 degrees latitude belt on either side of the equator moves in. This is how wind currents are being generated.

10. Answer: (c) Thunder

Explanation: Thunder is caused by the rapid expansion of the air surrounding the path of a lightning bolt. As lightning connects to the ground from the clouds, a second stroke of lightning will return from the ground to the clouds, following the same channel as the first strike.

11. Answer: (c) air

Explanation: Smoke is hotter and lighter than air. The India Meteorological department forecasts cyclones with the help of INSAT satellite. The heated air that rises up gets cooled and sinks which cause the convection currents.

12. Answer: (a) destructive

Explanation: Cyclones can be very destructive. Strong winds push water towards the shore even if the storm is hundreds of kilometres away. These are the first indications of an approaching cyclone.

13. Answer: (b) Calm area

Explanation: The eye is a region of mostly calm weather at the centre of strong tropical cyclones. In all storms, however, the eye is the location of the storm's minimum barometric pressure where the atmospheric pressure at sea level is the lowest.

14. Answer:(c) INSAT satellite

Explanation: This is done with the help of the INSAT satellite and chain of Cyclone Detection Radars (CDRS) installed along the coastal belt of India. These radars can locate and track an approaching cyclone within a range of 400 km.

15. Answer: (a) uneven heating on the earth

Explanation: Wind currents are produced due to the non-uniform heating of the Earth. That means uneven heating at the equator and the poles. This warm air rises and the making up of cooler air from the regions with the 0-30 degrees latitude belt on either side of the equator moves in. This is how wind currents are being generated.

16. Answer: (b) A device for measuring wind speed

Explanation: The anemometer counts the number of rotations, which is used to calculate wind speed. An anemometer is an instrument that measures wind speed and wind pressure. Anemometers are important tools for meteorologists, who study weather patterns. They are also important to the work of physicists, who study the way air moves.

17. Answer: (c) Both (a) and (b)

Explanation: Cyclones are called hurricanes in American continent and typhoons in Philippines and japan.

18. Answer: (a) Ventilators

Explanation: Ventilators are provided in the rooms at the top of the roofs because if the air inside the room gets hot, the hot air rises up and flows through these ventilators and thus cool air remains at bottom. It brings cool and fresh air in the room. Thus ventilators maintain conventional currents to keep the air fresh in the room.

19. Answer: (a) natural disaster

Explanation: Natural disasters are catastrophic events with atmospheric, geological, and hydrological origins (e.g., droughts, earthquakes, floods, hurricanes, landslides) that can cause fatalities, property damage and social environmental disruption.

20. Answer: (c) from the sky to the ground

Explanation: As a tornado is a dark funnel-shaped cloud that reaches from the sky to the ground.

21. Answer: (a) 300 km/h

Explanation:Tornado is a dark funnel shaped cloud that reaches from the sky to the ground. Most of the tornadoes are weak. A violent tornado can travel at speeds of about 300 km/h. Tornadoes may form within cyclones. In our country they are not very frequent.

22. Answer: (c) Flood

Explanation:These strong winds can also cause a storm surge and along with heavy rainfall, that can actually cause local flooding, which can cause more damage

23. Answer: (d) Southwest

Explanation: The monsoon winds that carry a lot of water to India come from the southwest direction.The monsoon is caused by differential temperature trends over the land and ocean. In India, the southwest summer monsoon is attracted by a low-pressure area that's caused by the extreme heat of the Thar Desert and adjoining areas, during summer. After the monsoon season is over, the wind direction reverses.

24. Answer: (b) Wind direction

Explanation: The instrument which used to measure wind direction is called wind vane. It is generally located at the highest point of a building. This is pointed at the direction in which the wind is blowing. Wind vane is used to predict the weather of a particular place, as the direction of wind plays important role in determining weather of a place.

25. Answer: (d) All of the above

Explanation: Factors like wind speed, wind direction, temperature and humidity contribute to the development of cyclones.

Click here for Practice MCQ Questions for Winds, Storms and Cyclones to Climate Class 7

Discussion

30.	How do you know that air exerts pressure? Give some examples.
Answer» Moving air exerts pressure, when the air blows we can see the fluttering of leaves in the tree, banners and flags.

Discussion

31.	Find out the odd man out and give reason for your answer:Mistral, Bora, Pampero, Foehn
Answer» Foehn – Others are cold and dry winds.

Discussion

32.	What is an anemometer?
Answer» An anemometer is an instrument which p is used to measure the speed of wind.

Discussion

33.	How thunderstorm occurs?
Answer» Thunderstorms develop in hot, humid tropical areas like India very frequently. The rising temperature produce strong upward rising winds. These winds carry water dropletes upwards where they freeze, and fall down again. The swift movement of the falling water droplets along with the rising air create lightning and sound this the thunderstorm.

Discussion

34.	What can we do to move the rolls to the other end of the table with a greater speed?
Answer» We mostly use the technique/object which will blow air with maximum force to move the rolls to the other end of the table with a greater speed.

Discussion

35.

Distinguish between the following:Valley breeze and Mountain breeze.

Answer»

Valley Breeze	Mountain Breeze
(i) Valley breeze blow during the day.	(i) Mountain breeze blow during the night.
(ii) Winds blow from the valley to the mountain.	(ii) Winds blow from the mountain to the valley.
(iii) Valley breeze blows because of the high pressure area created iin the valley.	(iii) Mountain Breeze blows because of the high pressure area created on the mountains.

Discussion

36.	Find out the odd man out and give reason for your answer:Landbreeze, Valley winds, Westerlies, Mountain winds.
Answer» Westerlies – Others are names of local winds.

Discussion

37.	What planning is required in advance to deal with the situation created by a cyclone?
Answer» Self – help is the best help. Therefore it is better to plan in advance and be ready with defense against any approaching cyclone. Planning required in advance to deal with cyclone – hit situation: 1. Keep an emergency kit at home. 2. Store enough food in water proof bags. 3. Store safe drinking water as contaminated water can cause diseases. 4. Keep phone numbers of emergency services like police, hospital, friends and relatives ready. 5. Make necessary arrangements to shift the essential household goods, domestic animals and vehicles etc to safer places.

37.

What planning is required in advance to deal with the situation created by a cyclone?

Answer»

Self – help is the best help. Therefore it is better to plan in advance and be ready with defense against any approaching cyclone.

Planning required in advance to deal with cyclone – hit situation:

1. Keep an emergency kit at home.

2. Store enough food in water proof bags.

3. Store safe drinking water as contaminated water can cause diseases.

4. Keep phone numbers of emergency services like police, hospital, friends and relatives ready.

5. Make necessary arrangements to shift the essential household goods, domestic animals and vehicles etc to safer places.

Discussion

38.	How Cyclones are formed? Explain the process.
Answer» Before the cloud formation, water takes up heat from the atmosphere to change into vapour. When water vapour changes back to liquid form as raindrops, this heat is released to atmosphere. The air around warms and tends to rise and causes a drop in pressure. More air rushes to the centre of the storm. This cycle is repeated, The chain of events ends with the formation of a very low pressure system with very high – speed winds revolving around is called as Cyclone. Factors like wind speed, wind direction, temperature and humidity contribute to the development of Cyclones.

Discussion

39.	A bolt of lightning is dangerous, why?
Answer» A bolt of lighting travels at a speed of more than 400,000 km/h. It can heat the air around it to a temperature which is more than 4 times of temperature of the surface of the sun. So it is very dangerous.

Discussion

40.	How will you help your neighbours in case cyclone approaches your village/town?
Answer» In case cyclone approaches, we should help our neighbours in the following ways : 1. By helping them in moving to cyclone shelters and other safe places. 2. By asking them to take necessary steps to shift animals, vehicles and household goods to safer places. 3. By calling the emergency services such as police, fire brigade and medical centers when required. 4. By not pressurising the rescue force by making undue demands.

40.

How will you help your neighbours in case cyclone approaches your village/town?

Answer»

In case cyclone approaches, we should help our neighbours in the following ways :

1. By helping them in moving to cyclone shelters and other safe places.

2. By asking them to take necessary steps to shift animals, vehicles and household goods to safer places.

3. By calling the emergency services such as police, fire brigade and medical centers when required.

4. By not pressurising the rescue force by making undue demands.

Discussion

41.	How will you help your neighbours in case cyclone approaches your village/town?
Answer» On approaching of the cyclone, we should do the following: 1. Help our neighbours and friends in shifting their important household goods, cattle and vehicles to safer places. 2. Communicate with government agencies like police, fire brigade, medical centres and other emergency service points as per requirement. 3. We should store water for safe drinking. 4. We should avoid driving roads nearby flood hit areas.

Discussion

42.	Without touching the roll of the paper on the table, what can be done to move the paper rolls to the other end of the table?
Answer» To move the paper rolls to the other end of the table without touching a person can. Blow the air from his mouth towards the roll of paper Use a newspaper a book or a hand fan Tilt the table towards the other end.

42.

Without touching the roll of the paper on the table, what can be done to move the paper rolls to the other end of the table?

Answer»

To move the paper rolls to the other end of the table without touching a person can.

Blow the air from his mouth towards the roll of paper
Use a newspaper a book or a hand fan
Tilt the table towards the other end.

Discussion

43.	Following are precautions one must take in case a storm is accompanied by lightning.(i) Do not take shelter under a tree.(ii) Do not take shelter under an umbrella with a metallic end.(iii) Do not take shelter in open garages, storage sheds, etc.(iv) Do not take shelter in a bus in the open.Which one of these is not correct?(a) (i) (b) (ii)(c) (iii) (d) (iv)
Answer» (iv) Do not take shelter in a bus in the open.

Discussion

44.	Figure 8.2 shows a child blowing air with a straw near the opening of another straw which has its other end in a soft drink bottle. It was observed that the level of the soft drink in the straw rises up as soon as air is blown over its open end. Which one of the following best explains the reason for rise in level of the drink?(a) Blowing of air decreases pressure over the opening of the straw. (b) The straw of the soft drink bottle collapses when air is blown over its open end. (c) Blowing of air warms up the air inside the straw. (d) Blowing of air increases the pressure on the surface of soft drink in the bottle.
Answer» (a) Blowing of air decreases pressure over the opening of the straw.

Discussion

45.	Identify the type of winds from the description given below:i. In coastal areas, land cools down faster as compared to the sea, the air blows from land to sea.ii. In the Indian subcontinent, dry winds blow from the Indian Subcontinent towards the equator.iii. The winds blowing over the earth’s surface throughout the year and covering a large portion of the earth.iv. The winds that blow for a short duration of time, originate in specific regions & blow over a limited area.
Answer» i. Land Breeze. ii. North-East monsoon winds. iii. Planetary winds. iv. Local winds.

45.

Identify the type of winds from the description given below:i. In coastal areas, land cools down faster as compared to the sea, the air blows from land to sea.ii. In the Indian subcontinent, dry winds blow from the Indian Subcontinent towards the equator.iii. The winds blowing over the earth’s surface throughout the year and covering a large portion of the earth.iv. The winds that blow for a short duration of time, originate in specific regions & blow over a limited area.

Answer»

i. Land Breeze.

ii. North-East monsoon winds.

iii. Planetary winds.

iv. Local winds.

Discussion

46.	State one reason why:A belt of calm exists near the equator.
Answer» (i) A belt of calm exists near the equator because there is not much difference in the temperature and air pressure. (ii) So winds do not blow in this region.

46.

State one reason why:A belt of calm exists near the equator.

Answer»

(i) A belt of calm exists near the equator because there is not much difference in the temperature and air pressure.

(ii) So winds do not blow in this region.

Discussion

47.	Figure 8.2 shows a child blowing air with a straw near the opening of another straw which has its other end in a soft drink bottle. It was observed that the level of the soft drink in the straw rises up as soon as air is blown over its open end. Which one of the following best explains the reason for rise in level of the drink?(a) Blowing of air decreases pressure over the opening of the straw.(b) The straw of the soft drink bottle collapses when air is blown over its open end.(c) Blowing of air warms up the air inside the straw.(d) Blowing of air increases the pressure on the surface of soft drink in the bottle.
Answer» (a) Blowing of air decreases pressure over the opening of the straw.

Discussion

48.	What could be the reason of the delay in making the rolls reach to the other end of the table?
Answer» There will be a delay in making the rolls reach the other end of the table if the air is blown with lesser force.

Discussion

49.

Place a tick mark (✓) against the correct option:i. Towards which direction do the southern hemisphere winds get deflected? . (a) Towards the left. (b) Towards the right. (c) Towards the centre.ii. What are the winds blowing between polar high pressure belt and subpolar low pressure belt called? (a) Monsoon winds (b) Polar winds (c) Westerlies windsiii. Hot and destructive winds blowing in the Sahara (a) Chinook (b) Simoom (c) Looiv. Cold winds around the Mediterranean. (a) Foehn (b) Pampero (c) Mistralv. How is cyclonic condition created?(a) Low pressure area is surrounded by high pressure. (b) A high pressure area is surrounded by low pressure. (c) A low pressure area is surrounded by mid pressure.

Answer»

i. (a) Towards the left.

ii. (a) Monsoon winds

iii. (b) Simoom

iv. (b) Pampero

v. (c) A low pressure area is surrounded by mid pressure.

Discussion

50.

State one reason why:The winds coming from the north-west in the southern hemisphere have greater velocities than the winds coming from the south-west in the northern hemisphere.

Answer»

(i) In the southern hemisphere the obstacle caused by the relief of the land surface is almost absent.

(ii) Therefore the winds coming from the north – west in the southern hemisphere have greater velocity than the winds coming from the south-west in the northern hemisphere.

Discussion

Explore topic-wise InterviewSolutions in .

Fill the missing word in the blank spaces in the following statements:(a) Wind is air.(b) Winds are generated due to heating on the earth.(c) Near the earth’s surface air rises up whereas air comes down.(d) Air moves from a region of pressure to a region of pressure.

Define the following term:Roaring Forties.

Which one of the following place is unlikely to be affected by a cyclone?(i) Chennai(ii) Mangaluru (Mangalore)(iii) Amritsar(iv) Puri

Suppose you are a member of a committee, which is responsible for creating development plan of a coastal state. Prepare a short speech indicating the measures to be taken to reduce the suffering of the people caused by cyclones.

Define the following term:Horse Latitudes.

Define the following term:Local Winds.

Define the following term:Doldrums.

Define the following term:Screeching Sixties.

Define the following term:Typhoons.

Define the following term:Hurricanes.

State one reason why:The air pressure in land and water is different.

Distinguish between the following:Cyclones and Anticyclones.

What effect does the rotation of the earth have on the wind?

Find out the odd man out and give reason for your answer:Polar winds, Local winds, Easterlies, Westerlies

Find out the odd man out and give reason for your answer:Southeast Asia, West Europe, East Africa, North Australia.

Suggest two methods to find out wind direction at a given place.

You want to buy a house. Would you like to buy a house having windows but no ventilators? Explain your answer

You want to buy a house. Would you like to buy a house having windows but no ventilators? Explain your answer.

You want to buy a house, would you like to buy a house having windows but no ventilators? Explain your answer.

State two experiences that made you think that air exerts pressure.

State two experience that made you think that air exerts pressure (other than those given in the text.)

State two experiences that made you think that air exerts pressure (other than those given in the text).

Find out the odd man out and give reason for your answer:Mistral, Bora, Chinook, Foehn

Find out the odd man out and give reason for your answer:India, Japan, China, Phillippines.

What are anticyclones?

Important Class 7 Science MCQ Questions of Winds, Storms and Cyclones with Answers?

How do you know that air exerts pressure? Give some examples.

Find out the odd man out and give reason for your answer:Mistral, Bora, Pampero, Foehn

What is an anemometer?

How thunderstorm occurs?

What can we do to move the rolls to the other end of the table with a greater speed?

Distinguish between the following:Valley breeze and Mountain breeze.

Find out the odd man out and give reason for your answer:Landbreeze, Valley winds, Westerlies, Mountain winds.

What planning is required in advance to deal with the situation created by a cyclone?

How Cyclones are formed? Explain the process.

A bolt of lightning is dangerous, why?

How will you help your neighbours in case cyclone approaches your village/town?

How will you help your neighbours in case cyclone approaches your village/town?

Without touching the roll of the paper on the table, what can be done to move the paper rolls to the other end of the table?

State one reason why:A belt of calm exists near the equator.

What could be the reason of the delay in making the rolls reach to the other end of the table?

State one reason why:The winds coming from the north-west in the southern hemisphere have greater velocities than the winds coming from the south-west in the northern hemisphere.