Winds Storms and Cyclones Test

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Winds Storms and Cyclones Test - 11

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Weekly Quiz Competition

Question 1
1 / -0

What is the importance of Monsoon winds ?

A
They lower the temperature of areas where temperature is usually high.

B
They bring rain and play important role in water cycle.

C
They clear up the sky and make atmosphere sunny.

D
None of the above

Solution

The correct answer is option(B).
The winds from the oceans carry water and bring rain. It is a part of the water cycle. The monsoon winds carry water and it rain.
Question 2
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In which region of the cyclone, do you find high speed winds?

A
In the Eye of the Cyclone

B
In the region around the eye

C
In the region away from the cloud

D
Anywhere in the surrounding

Solution

The center of a cyclone is a calm area. It is called the eye of the storm. A large cyclone is a violently rotating mass of air in the atmosphere, $$10$$ to $$15\ km$$ high. The diameter of the eye varies from $$10$$ to $$30\ km$$. It is a region free of clouds and has light winds. Around this calm and clear eye, there is a cloud region of about $$150\ km$$ in size. In this region, there are high-speed winds $$(150–250\ km/h)$$ and thick clouds with heavy rain. Away from this region the wind speed gradually decreases.
Question 3
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What is the direction of Monsoon winds in Summer ?

A
From ocean towards the land

B
From land towards the ocean

C
From equator towards the poles

D
From poles towards the equator

Solution

Monsoon winds blow from cold to warm regions because cold air takes up more space than warm air. So, monsoons blow from the sea toward land in the summer as land is hotter and ocean is colder.
Question 4
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What does the above figure correspond to?

A
Lightening

B
Cyclone

C
Thunderstorm

D
Flood

Solution

As a large cyclone is a violently rotating mass of air in the atmosphere. A cyclone is a general term for a weather system in which winds rotate inwardly to an area of low atmospheric pressure.
Question 5
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Which of the following factors will contribute to the formation of cyclone?

A
Humidity

B
Wind speed

C
Wind direction

D
All of the above

Solution

Factors like wind speed, wind direction, temperature and humidity contribute to the development of cyclones.
Question 6
1 / -0

Fill in the blank.
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
12, 24

B
24, 12

C
24, 48

D
48, 24

Solution

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.
Question 7
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Which of the following depicts a cyclone ?

A

B

C

D

Solution

Option(A) depicts forest fire. Option(B) depicts earthquake. Option(C) depicts cyclone. Option(D) depicts thunderstorm.
And a large cyclone is a violently rotating mass of air in the atmosphere.So option C is correct.
Question 8
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What is the direction of Monsoon winds in winter ?

A
From oceans to land

B
From land to oceans

C
From equator to poles

D
From poles to equator

Solution

Image result for what is the direction of Monsoon winds in winter.
Monsoon winds blow from cold to warm regions because cold air takes up more space than warm air. So, monsoons blow from the land toward the sea in winter and from the sea toward land in the summer. India's winters are hot and dry. The monsoon winds blow from the northeast and carry little moisture.
Question 9
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Why do the polar winds not move in exact North-South direction?

A
The revolution of the earth affects the direction of the winds.

B
The rotation of the earth affects the direction of the winds.

C
The Other air currents in the atmosphere change the direction of the polar winds.

D
None of these

Solution

The polar winds do not move in exact North-South direction winds would have flown in the north-south direction from north to south, or from south to north. A change in direction is, however, caused by the rotation of the earth.
Question 10
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Why is warm air lighter than cold air?

A
Due to heating, the pressure of air increases and air with higher pressure is lighter than air with lower pressure.

B
Due to heating, the pressure of air decreases and air with lower pressure is lighter than air with higher pressure.

C
Due to heating, air expands. When same mass occupies more volume it becomes lighter.

D
Due to heating, air contracts. When same mass occupies less volume it becomes lighter.

Solution

Warm air is lighter than cold air because on heating the air expands and occupies more space. When the same thing occupies more space, it becomes lighter and is lesser. The warm air rises up since it is lighter. The less denser air floats in the much denser air just like ice floats on water as ice is is less dense than water.