Winds, Storms and Cyclones: Class 7 Science Q&A

17 free answers on Winds, Storms and Cyclones (Science) for Class 7 students, across CBSE, ICSE and State boards. Includes questions such as “Why is it advisable not to shut all the doors and windows during a storm?”, “Why is Chandigarh unlikely to be affected by a cyclone?”, “What is the difference between biotic and abiotic?”

Question & Answer

Questions

17 TOTAL

ScienceClass 7CBSE
Suggest some precautions to be taken to prevent the roof of a tin sheet from flying away during a fierce windstorm
Soln: (i) Put heavy stones on it. (ii) Screw it tight.
ScienceClass 7CBSE
When strong/high-speed wind blows, an umbrella held upright at times gets upturned. Explain the reason.
Soln: Umbrella upturns because of the high-speed water passing through umbrella creates low pressure.
ScienceClass 7CBSE
Paheli kept an empty bottle made of plastic inside a refrigerator. After few hours, when she opened the refrigerator she found the bottle had collapsed. Explain the possible reason.
Soln: The air inside the bottle contracts due to low temperature hence the bottle collapses due to the outside pressure.
ScienceClass 7CBSE
16. Match Column I with Column II. There can be more than one match. Column-I Column-II a) On heating air i) Descends b) On cooling air ii) Expands   iii) Contracts   iv) Rises
Soln: Column-I Column-II a) On heating air ii) Expands b) On cooling air iv) Rises
ScienceClass 7CBSE
A flag mounted on a flag post near the sea coast flutters in the direction of sea. At what time of the day does this happen – at midnight or in the afternoon?
Soln: Midnight, because of a land breeze.
ScienceClass 7CBSE
A flat in Mumbai with a balcony facing the sea has some clothes hung on a clothesline in the balcony. Towards which direction will the clothes be blown in the afternoon? Explain.
Soln: Because the sea breeze blowing towards the land clothes will be blown towards the house.
ScienceClass 7CBSE
Why is it advisable not to shut all the doors and windows during a storm?
Soln: In order to avoid the roof from getting blown away due to the low pressure created by heavy wind.
ScienceClass 7CBSE
To expel hot air out of the kitchen, ‘A’ has an exhaust fan fitted on the window of her kitchen and ‘B’ has a similar exhaust fan fitted on the wall near the ceiling of her kitchen. Which of the exhaust fan will expel the hot air more effectively? Explain why?
Soln: Exhaust fan of B will expel the hot air effectively as air rises up and her fan is at a greater height than A’s.
ScienceClass 7CBSE
State whether the following statements are True or False: (i) If wind flows from land to the ocean, then it is daytime. (ii) A very high-pressure system, with very high-speed wind surrounding it forms a cyclone. (iii) The coastline of India is not vulnerable to cyclones. (iv) Warm air is lighter than cool air.
Soln: (i) False- if the wind blows from land to the ocean, then it is night time because, at night, the water cools down more slowly than the land. So, the cool wind from the land moves towards the ocean. (ii) False – a very low-pressure system, with very high-speed winds revolving around it, forms a cyclone. (iii) False- the whole coastline of India is vulnerable to cyclones, particularly the east coast. (iv) True
ScienceClass 7CBSE
Fill in the blanks. (i) Air around us exerts __________ . (ii) The moving air is called _________ . (iii) The main cause of wind movement is uneven ___________ on the earth. (iv) High-speed wind can cause cyclone in regions of ___________ pressure.
Soln: (i) The air around us exerts Pressure. (ii) The moving air is called Wind. (iii) The main cause of wind movement is uneven heating on the earth. (iv) High-speed wind can cause cyclone in regions of low pressure.
ScienceClass 7CBSE
Name the ocean which is mainly responsible for bringing rain-bearing monsoon winds to the Kerala coast in June every year?
Soln: Indian Ocean
ScienceClass 7CBSE
Why is Chandigarh unlikely to be affected by a cyclone?
Soln: Chandigarh is very far from the sea hence it is unlikely to be affected by a cyclone.
ScienceClass 7CBSE
A curtain is hanging at the entrance of a room. A long corridor runs at right angles to the door, which 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.
Soln: The answer is (b) get pushed outside the room. Explanation: If a strong wind blows along the corridor, then the air pressure increases and the curtain gets pushed outside the room.
ScienceClass 7CBSE
Which of the following place is most likely to be affected by a cyclone? (a) Mumbai (b) Puri (c) Goa (d) Porbandar
Soln: The answer is (b) Puri Explanation: Because Puri lies near the coastal area.
ScienceClass 7CBSE
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)
Soln: The answer is (d) (iv)
ScienceClass 7CBSE
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
Soln: The answer is (d) On the ceiling Explanation: In case of fire, the air above the fire gets heated hence fire alarms are set on the ceiling
ScienceClass 7All
What is the difference between biotic and abiotic?
Biotic and abiotic factors are two categories used to describe different components of ecosystems. Here are five key differences between biotic and abiotic factors: Definition: Biotic Factors: Biotic factors refer to the living components of an ecosystem. These include all organisms such as plants, animals, fungi, bacteria, and other microorganisms that interact with each other in an ecosystem. Abiotic Factors: Abiotic factors, on the other hand, refer to the non-livin

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Winds, Storms and Cyclones: Class 7 Science Q&A

Questions

Suggest some precautions to be taken to prevent the roof of a tin sheet from flying away during a fierce windstorm

When strong/high-speed wind blows, an umbrella held upright at times gets upturned. Explain the reason.

Paheli kept an empty bottle made of plastic inside a refrigerator. After few hours, when she opened the refrigerator she found the bottle had collapsed. Explain the possible reason.

16. Match Column I with Column II. There can be more than one match. Column-I Column-II a) On heating air i) Descends b) On cooling air ii) Expands &nbsp; iii) Contracts &nbsp; iv) Rises

A flag mounted on a flag post near the sea coast flutters in the direction of sea. At what time of the day does this happen – at midnight or in the afternoon?

A flat in Mumbai with a balcony facing the sea has some clothes hung on a clothesline in the balcony. Towards which direction will the clothes be blown in the afternoon? Explain.

Why is it advisable not to shut all the doors and windows during a storm?

To expel hot air out of the kitchen, ‘A’ has an exhaust fan fitted on the window of her kitchen and ‘B’ has a similar exhaust fan fitted on the wall near the ceiling of her kitchen. Which of the exhaust fan will expel the hot air more effectively? Explain why?

Fill in the blanks. (i) Air around us exerts __________ . (ii) The moving air is called _________ . (iii) The main cause of wind movement is uneven ___________ on the earth. (iv) High-speed wind can cause cyclone in regions of ___________ pressure.

Name the ocean which is mainly responsible for bringing rain-bearing monsoon winds to the Kerala coast in June every year?

Why is Chandigarh unlikely to be affected by a cyclone?

Which of the following place is most likely to be affected by a cyclone? (a) Mumbai (b) Puri (c) Goa (d) Porbandar

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

What is the difference between biotic and abiotic?

16. Match Column I with Column II. There can be more than one match. Column-I Column-II a) On heating air i) Descends b) On cooling air ii) Expands iii) Contracts iv) Rises

Fill in the blanks. (i) Air around us exerts ______ . (ii) The moving air is called _ . (iii) The main cause of wind movement is uneven _ on the earth. (iv) High-speed wind can cause cyclone in regions of _____ pressure.