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Winds, Storms and Cyclones

Description: Wind, Storms and Cyclone, Physics, Science
Number of Questions: 15
Created by:
Tags: Science Winds & Wind Currents Winds, Storms and Cyclones Thunderstorms and Cyclones. Destruction Caused by Cyclones and Effective Safety Measures. Alimentary Canal - Parts and Functions
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What instrument is used to measure the speed of the wind?

  1. Actinometer

  2. Anemometer

  3. Altimeter

  4. Barometer

  5. Audiometer

Show answer
Correct Option: B
Explanation:

It is correct. Anemometer is the instrument for measuring wind speed.

The pressure exerted by air on all bodies at all times in all directions is called air pressure.

How is a low pressure area created?

  1. The air moves at low speed.

  2. The air moves at high speed.

  3. The air resistance.

  4. Difference of temperature between two areas.

  5. High temperature and low wind speed.

Show answer
Correct Option: B
Explanation:

It is correct. When air moves at high speed, it creates a low pressure area.

All storms are _____________________ storms.

  1. high pressure

  2. low pressure

  3. cyclonic

  4. severe and accompanied by lightning

  5. low velocity

Show answer
Correct Option: B
Explanation:

Correct. All storms are low pressure storms.

How are winds generated?

  1. By uneven heating on the earth.

  2. By the rotation of the earth.

  3. By the air pressure exerted in the atmosphere.

  4. By the difference between the pressures of the air in two regions.

  5. None of the above

Show answer
Correct Option: A
Explanation:

 At the poles, the air is colder than that at latitudes about 60 degrees. The warm air at these latitudes rises up and the cold wind from the polar regions rushes in  to take its place. In this way, wind circulation is set up from the poles to the warmer latitudes. The change in direction of winds is however, caused by the rotation of the earth, which is also the cause of the uneven heating of the earth.

Which of the following places in India is most likely to be hit by a strong cyclone, frequently?

  1. Mumbai

  2. Puri

  3. Jammu

  4. Cochin

  5. Goa

Show answer
Correct Option: B
Explanation:

Correct. The coastline of India is vulnerable to cyclones, particularly the east coast. The west coast of India is less vulnerable to cyclonic storms both in terms of intensity and frequency of the cyclones.

A storm with lightning and thunder is called a thunderstorm. It occurs due to the convection of air in ____________.

  1. cold and polar areas, such as Iceland

  2. moderate and pleasant weather, such as Pune

  3. hot and humid areas, such as Bhubneshwar

  4. equatorial areas such as the Sahara

  5. hilly areas such as Shimla

Show answer
Correct Option: C
Explanation:

Correct. A storm with lightning and thunder is called a thunderstorm. It occurs due to the convection of air in hot and humid areas.

Directions: Read the given scenario carefully and answer the question that follows. Preeti fills up her plastic bottle with hot water, but then she puts it in the sink beneath cold running water. Suddenly the bottle contracts and gets mangled.

Which of the following options best describe what happened to the bottle?

  1. The heat of the boiling water changed its shape.

  2. The boiling water contains hot gases that react with the plastic.

  3. The change in temperatures causes it to get mangled.

  4. The air outside exerts pressure on the bottle.

  5. The cold air outside pushes the hot water inside.

Show answer
Correct Option: D
Explanation:

Correct. As water is poured over the bottle, some steam in the bottle condenses into water, reducing the amount of air inside. The pressure of air inside the bottle decreases than the pressure exerted by the air from outside the bottle. As a result the bottle contracts and gets mangled, bottle gets compressed.This activity again confirms that the air outside exerts pressure on the bottle.

Which of the following is the first indication of an approaching cyclone?

  1. Rising water wall up to 13 feet.

  2. The low air pressure

  3. Continuous heavy rainfall

  4. Strong winds pushing water

  5. Rain and lightning

Show answer
Correct Option: D
Explanation:

 Correct. 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.

Match the two columns:

1. Moving air a. expands
2. Cold wind b. heavy
3. Hot air c. wind

  1. 1 - a, 2 - b, 3 - c

  2. 1 - b, 2 - c, 3 - a

  3. 1 - a, 2 - c, 3 - b

  4. 1 - b, 2 - a, 3 - c

  5. 1 - c, 2 - b, 3 - a

Show answer
Correct Option: E
Explanation:

Correct. Moving air is called wind. Hot air expands and cold winds from polar regions is heavier.

Which of the following options best explains a storm surge?

  1. High winds accompanied by rain that uproots trees, houses and other property.

  2. A high wall of water moving towards the shore from the ocean.

  3. A high tide and then the storm reaching an area that might otherwise have been safe.

  4. Heavy rainfall that worsens the flood situation.

  5. Flooding of agricultural land by sea water making it infertile.

Show answer
Correct Option: B
Explanation:

 A high wall of water moving towards the shore from the ocean is called a storm surge. This wall of water can rise up from 3 feet to 12 feet.

What effect will increased wind speed have on accompanying air pressure?

  1. The air pressure will also increase.

  2. The air pressure will also reduce.

  3. The air pressure will see moderate changes depending on the climate of the place.

  4. No change in air pressure can be ascertained.

  5. The air pressure has no relation whatsoever with wind speed.

Show answer
Correct Option: B
Explanation:

Correct. Air moves from the region where the air pressure is high to the region where the pressure is low. The greater the difference in pressure, the faster the air moves. Thus, increased wind speed is, indeed, accompanied by a reduced air pressure.

Which of the following statements are incorrect about tornadoes?

A. The diameter of a tornado can be as small as a meter and as large as a kilometer. B. The funnel sucks everything near the base and throws out every thing from the top. C. The funnel sucks everything due to high pressure.

  1. Only A

  2. Only B

  3. Only C

  4. Both A and B

  5. Both A and C

Show answer
Correct Option: C
Explanation:

It is correct. As this statement is incorrect. The funnel sucks everything due to low pressure, not high pressure.

Which of the following is not a destruction caused through a cyclone?

  1. Flooding of agricultural land by sea water making it infertile.

  2. Heavy rainfall that worsens the flood situation.

  3. A high wall of water moving towards the shore from the ocean.

  4. A severe winter storm characterized by heavy snow and strong winds.

  5. Extremely high speed winds.

Show answer
Correct Option: D
Explanation:

Correct. This is caused by a blizzard, not a cyclone.

  1. A thunderstorm occurs due to the convection of air in hot and humid areas. 2. In America, a cyclone is referred to as a typhoon. 3. The coastline of India is invulnerable to cyclones.

Which of the statements given above is/are correct?

  1. Only 1

  2. Only 2

  3. Only 3

  4. Both 1 and 2

  5. Both 2 and 3

Show answer
Correct Option: A
Explanation:

Correct. A thunderstorm occurs due to the convection of air in hot and humid areas. Rest are incorrect.

Which of the following should be done during a thunderstorm?

  1. Try to take shelter underneath trees if caught in the storm.

  2. Take shelter under an umbrella with a metallic end.

  3. Consider shifting the essential household goods, domestic animals and vehicles, etc., to safer places.

  4. Lie down flat, if in an open place.

  5. Sit near a window.

Show answer
Correct Option: C
Explanation:

It is correct. We should make necessary arrangements to shift the essential household goods, domestic animals and vehicles, etc., to safer places.

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