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

Question

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

Answer 1

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 2

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.

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