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Geography Air masses, fronts, and cyclones MCQ Questions for Class 11 Science

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किस क्षेत्र को वायुराशि का स्रोत क्षेत्र कहा जाता है?

Which area is called the source region of an air mass?

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Correct Answer

A. जहां हवा अपने गुण प्राप्त करती हैWhere air gets its properties

Step 1

Concept

A source region is where air gains temperature and moisture characteristics. In exams remember broad uniform areas as source regions.

Step 2

Why this answer is correct

The correct answer is A. जहां हवा अपने गुण प्राप्त करती है / Where air gets its properties. A source region is where air gains temperature and moisture characteristics. In exams remember broad uniform areas as source regions.

Step 3

Exam Tip

स्रोत क्षेत्र वह स्थान है जहां वायु ताप और नमी के गुण ग्रहण करती है। परीक्षा में बड़े समान क्षेत्र को स्रोत क्षेत्र मानें।

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वायुराशि बनने के लिए हवा को स्रोत क्षेत्र पर कैसा रहना चाहिए?

For an air mass to form how should air stay over a source region?

Explanation opens after your attempt
Correct Answer

B. काफी समय तकFor a long time

Step 1

Concept

Air staying for a long time takes temperature and moisture properties from the surface. In exams remember both time and uniform surface.

Step 2

Why this answer is correct

The correct answer is B. काफी समय तक / For a long time. Air staying for a long time takes temperature and moisture properties from the surface. In exams remember both time and uniform surface.

Step 3

Exam Tip

हवा लंबे समय तक रुककर सतह के ताप और नमी जैसे गुण लेती है। परीक्षा में समय और समान सतह दोनों याद रखें।

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समुद्र के ऊपर बनी वायुराशि को सामान्यतः क्या कहा जाता है?

What is an air mass formed over the sea generally called?

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Correct Answer

C. समुद्रीMaritime

Step 1

Concept

An air mass formed over the sea is called maritime and has more moisture. In exams link maritime with moisture.

Step 2

Why this answer is correct

The correct answer is C. समुद्री / Maritime. An air mass formed over the sea is called maritime and has more moisture. In exams link maritime with moisture.

Step 3

Exam Tip

समुद्र पर बनने वाली वायुराशि समुद्री कहलाती है और इसमें नमी अधिक होती है। परीक्षा में समुद्री शब्द को नमी से जोड़ें।

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भूमि के ऊपर बनी वायुराशि को क्या कहते हैं?

What is an air mass formed over land called?

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Correct Answer

D. महाद्वीपीयContinental

Step 1

Concept

An air mass formed over land is called continental and is usually dry. In exams connect continental with land.

Step 2

Why this answer is correct

The correct answer is D. महाद्वीपीय / Continental. An air mass formed over land is called continental and is usually dry. In exams connect continental with land.

Step 3

Exam Tip

भूमि पर बनने वाली वायुराशि महाद्वीपीय कहलाती है और प्रायः शुष्क होती है। परीक्षा में महाद्वीपीय को भूमि से जोड़ें।

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कम अक्षांशों में बनने वाली वायुराशि का सामान्य ताप कैसा होता है?

What is the usual temperature of an air mass formed in low latitudes?

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Correct Answer

A. गर्मWarm

Step 1

Concept

Low latitudes receive more heat so their air masses are warm. In exams connect low latitudes with warmth.

Step 2

Why this answer is correct

The correct answer is A. गर्म / Warm. Low latitudes receive more heat so their air masses are warm. In exams connect low latitudes with warmth.

Step 3

Exam Tip

कम अक्षांश सूर्य से अधिक ताप पाते हैं इसलिए वहां की वायुराशि गर्म होती है। परीक्षा में कम अक्षांश को गर्म से जोड़ें।

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उच्च अक्षांशों में बनने वाली वायुराशि सामान्यतः कैसी होती है?

An air mass formed in high latitudes is generally what?

Explanation opens after your attempt
Correct Answer

B. ठंडीCold

Step 1

Concept

High latitudes have lower temperature so air masses are cold. In exams connect high latitudes with polar conditions.

Step 2

Why this answer is correct

The correct answer is B. ठंडी / Cold. High latitudes have lower temperature so air masses are cold. In exams connect high latitudes with polar conditions.

Step 3

Exam Tip

उच्च अक्षांशों में ताप कम होता है इसलिए वायुराशि ठंडी होती है। परीक्षा में उच्च अक्षांश को ध्रुवीय स्थिति से जोड़ें।

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दो वायुराशियों की मिलन सीमा को क्या कहते हैं?

What is the meeting boundary of two air masses called?

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Correct Answer

C. वाताग्रFront

Step 1

Concept

A front is the boundary between two air masses with different properties. In exams link boundary with front.

Step 2

Why this answer is correct

The correct answer is C. वाताग्र / Front. A front is the boundary between two air masses with different properties. In exams link boundary with front.

Step 3

Exam Tip

वाताग्र दो अलग गुणों वाली वायुराशियों की सीमा होती है। परीक्षा में सीमा शब्द को वाताग्र से जोड़ें।

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वाताग्र के दोनों ओर सामान्यतः किसमें अंतर होता है?

On both sides of a front there is usually a difference in what?

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Correct Answer

D. ताप और आर्द्रताTemperature and humidity

Step 1

Concept

Different air masses meet at a front so temperature and humidity change. In exams this is the sign of weather change.

Step 2

Why this answer is correct

The correct answer is D. ताप और आर्द्रता / Temperature and humidity. Different air masses meet at a front so temperature and humidity change. In exams this is the sign of weather change.

Step 3

Exam Tip

वाताग्र पर अलग वायुराशियां मिलती हैं इसलिए ताप और आर्द्रता बदलती है। परीक्षा में मौसम परिवर्तन का संकेत यही है।

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स्थिर वाताग्र में वायुराशियों की गति कैसी होती है?

How is the movement of air masses in a stationary front?

Explanation opens after your attempt
Correct Answer

C. कोई भी स्पष्ट रूप से आगे नहीं बढ़तीNeither clearly advances

Step 1

Concept

In a stationary front the boundary stays nearly in one place. In exams remember stationary means little movement.

Step 2

Why this answer is correct

The correct answer is C. कोई भी स्पष्ट रूप से आगे नहीं बढ़ती / Neither clearly advances. In a stationary front the boundary stays nearly in one place. In exams remember stationary means little movement.

Step 3

Exam Tip

स्थिर वाताग्र में सीमा लगभग एक स्थान पर रहती है। परीक्षा में स्थिर का अर्थ कम गति याद रखें।

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अवरोधित वाताग्र किस स्थिति में बन सकता है?

In which situation can an occluded front form?

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Correct Answer

D. जब शीत वाताग्र उष्ण वाताग्र को पकड़ लेWhen a cold front catches a warm front

Step 1

Concept

In an occluded front cold air lifts warm air above the surface. In exams connect it with a mature cyclone.

Step 2

Why this answer is correct

The correct answer is D. जब शीत वाताग्र उष्ण वाताग्र को पकड़ ले / When a cold front catches a warm front. In an occluded front cold air lifts warm air above the surface. In exams connect it with a mature cyclone.

Step 3

Exam Tip

अवरोधित वाताग्र में ठंडी वायु गर्म वायु को सतह से ऊपर उठा देती है। परीक्षा में इसे परिपक्व चक्रवात से जोड़ें।

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