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Geography Post-drift studies and Convectional Current Theory MCQ Questions for Class 11 Science

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Question 131/600 Easy Geography Distribution of Oceans and Continents Post-drift studies and Convectional Current Theory Class 11 Level 33

गर्त क्षेत्र को धंसाव क्षेत्र क्यों कहा जा सकता है?

Why can a trench area be called a sinking zone?

Explanation opens after your attempt
Correct Answer

A. क्योंकि वहाँ सामग्री नीचे जा सकती हैBecause material may move downward there

Step 1

Concept

Trenches may be linked with downward movement and subduction. Exam tip: understand the trench-sinking relation.

Step 2

Why this answer is correct

The correct answer is A. क्योंकि वहाँ सामग्री नीचे जा सकती है / Because material may move downward there. Trenches may be linked with downward movement and subduction. Exam tip: understand the trench-sinking relation.

Step 3

Exam Tip

गर्त नीचे जाने वाली गति और अवगमन से जुड़े हो सकते हैं। परीक्षा में गर्त और धंसाव का संबंध समझें।

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Question 132/600 Easy Geography Distribution of Oceans and Continents Post-drift studies and Convectional Current Theory Class 11 Level 33

समुद्री तल प्रसरण ने किस पुराने विचार को चुनौती दी?

Seafloor spreading challenged which old idea?

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Correct Answer

A. समुद्री तल स्थिर हैOcean floor is fixed

Step 1

Concept

Seafloor spreading showed that the ocean floor can also be mobile. Exam tip: distinguish fixity and mobility.

Step 2

Why this answer is correct

The correct answer is A. समुद्री तल स्थिर है / Ocean floor is fixed. Seafloor spreading showed that the ocean floor can also be mobile. Exam tip: distinguish fixity and mobility.

Step 3

Exam Tip

समुद्री तल प्रसरण ने दिखाया कि समुद्र तल भी गतिशील हो सकता है। परीक्षा में स्थिरता और गतिशीलता का अंतर रखें।

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Question 133/600 Easy Geography Distribution of Oceans and Continents Post-drift studies and Convectional Current Theory Class 11 Level 33

संवहन धारा सिद्धांत किस बड़े सिद्धांत के विकास में सहायक रहा?

Convectional Current Theory helped in the development of which larger theory?

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Correct Answer

A. प्लेट विवर्तनिकीPlate tectonics

Step 1

Concept

Convection currents gave a base for explaining plate movement. Exam tip: connect it with plate tectonics.

Step 2

Why this answer is correct

The correct answer is A. प्लेट विवर्तनिकी / Plate tectonics. Convection currents gave a base for explaining plate movement. Exam tip: connect it with plate tectonics.

Step 3

Exam Tip

संवहन धाराओं ने प्लेट गति की व्याख्या में आधार दिया। परीक्षा में इसे प्लेट विवर्तनिकी से जोड़ें।

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Question 134/600 Easy Geography Distribution of Oceans and Continents Post-drift studies and Convectional Current Theory Class 11 Level 33

मेंटल की संवहन धाराएँ कितनी तेज मानी जाती हैं?

How fast are mantle convection currents considered?

Explanation opens after your attempt
Correct Answer

A. बहुत धीमीVery slow

Step 1

Concept

Mantle movement is very slow and effective over geological time. Exam tip: consider a long time scale.

Step 2

Why this answer is correct

The correct answer is A. बहुत धीमी / Very slow. Mantle movement is very slow and effective over geological time. Exam tip: consider a long time scale.

Step 3

Exam Tip

मेंटल की गति बहुत धीमी और भूवैज्ञानिक समय में प्रभावी होती है। परीक्षा में समय पैमाना लंबा मानें।

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Question 135/600 Easy Geography Distribution of Oceans and Continents Post-drift studies and Convectional Current Theory Class 11 Level 33

कौन सा विकल्प आंतरिक ऊष्मा का स्रोत हो सकता है?

Which option can be a source of internal heat?

Explanation opens after your attempt
Correct Answer

A. रेडियोधर्मी पदार्थों का क्षयDecay of radioactive materials

Step 1

Concept

Radioactive decay can generate heat inside Earth. Exam tip: link it with internal heat.

Step 2

Why this answer is correct

The correct answer is A. रेडियोधर्मी पदार्थों का क्षय / Decay of radioactive materials. Radioactive decay can generate heat inside Earth. Exam tip: link it with internal heat.

Step 3

Exam Tip

रेडियोधर्मी क्षय पृथ्वी के अंदर ऊष्मा उत्पन्न कर सकता है। परीक्षा में इसे आंतरिक ऊष्मा से जोड़ें।

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Question 136/600 Easy Geography Distribution of Oceans and Continents Post-drift studies and Convectional Current Theory Class 11 Level 33

संवहन धारा सिद्धांत में मेंटल का महत्व क्यों है?

Why is the mantle important in Convectional Current Theory?

Explanation opens after your attempt
Correct Answer

A. वहीं गर्म और ठंडे पदार्थ की धीमी चक्रीय गति मानी जाती हैSlow cyclic movement of hot and cool material is considered there

Step 1

Concept

Mantle is considered the main zone of convection currents. Exam tip: understand mantle as the center of the theory.

Step 2

Why this answer is correct

The correct answer is A. वहीं गर्म और ठंडे पदार्थ की धीमी चक्रीय गति मानी जाती है / Slow cyclic movement of hot and cool material is considered there. Mantle is considered the main zone of convection currents. Exam tip: understand mantle as the center of the theory.

Step 3

Exam Tip

मेंटल संवहन धारा का मुख्य क्षेत्र माना जाता है। परीक्षा में मेंटल को सिद्धांत का केंद्र समझें।

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Question 137/600 Easy Geography Distribution of Oceans and Continents Post-drift studies and Convectional Current Theory Class 11 Level 33

पोस्ट ड्रिफ्ट अध्ययनों में कौन सा उपकरणीय कार्य महत्वपूर्ण रहा?

Which technical work was important in post-drift studies?

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Correct Answer

A. समुद्री तल का मानचित्रणMapping of ocean floor

Step 1

Concept

Ocean-floor mapping identified features like ridges and trenches. Exam tip: link mapping with marine discoveries.

Step 2

Why this answer is correct

The correct answer is A. समुद्री तल का मानचित्रण / Mapping of ocean floor. Ocean-floor mapping identified features like ridges and trenches. Exam tip: link mapping with marine discoveries.

Step 3

Exam Tip

समुद्री तल मानचित्रण से कटक और गर्त जैसी रचनाएँ पहचानी गईं। परीक्षा में मानचित्रण को समुद्री खोज से जोड़ें।

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Question 138/600 Easy Geography Distribution of Oceans and Continents Post-drift studies and Convectional Current Theory Class 11 Level 33

समुद्र तल की जटिलता को कौन सा जोड़ा सबसे अच्छा दिखाता है?

Which pair best shows the complexity of the ocean floor?

Explanation opens after your attempt
Correct Answer

A. कटक और गर्तRidges and trenches

Step 1

Concept

Ridges and trenches show relief of the ocean floor. Exam tip: connect them with ocean-floor relief.

Step 2

Why this answer is correct

The correct answer is A. कटक और गर्त / Ridges and trenches. Ridges and trenches show relief of the ocean floor. Exam tip: connect them with ocean-floor relief.

Step 3

Exam Tip

कटक और गर्त समुद्र तल की ऊँच नीच दिखाते हैं। परीक्षा में इन्हें महासागर तल राहत से जोड़ें।

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Question 139/600 Easy Geography Distribution of Oceans and Continents Post-drift studies and Convectional Current Theory Class 11 Level 33

बाद के अध्ययनों ने पृथ्वी को किस रूप में समझने में सहायता दी?

Later studies helped understand Earth in which way?

Explanation opens after your attempt
Correct Answer

A. गतिशील प्रणाली के रूप मेंAs a dynamic system

Step 1

Concept

These studies showed dynamic processes in the surface and interior. Exam tip: remember dynamic Earth.

Step 2

Why this answer is correct

The correct answer is A. गतिशील प्रणाली के रूप में / As a dynamic system. These studies showed dynamic processes in the surface and interior. Exam tip: remember dynamic Earth.

Step 3

Exam Tip

इन अध्ययनों ने दिखाया कि सतह और अंदरूनी भाग में गतिशील प्रक्रियाएँ हो सकती हैं। परीक्षा में गतिशील पृथ्वी याद रखें।

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Question 140/600 Easy Geography Distribution of Oceans and Continents Post-drift studies and Convectional Current Theory Class 11 Level 33

संवहन धाराओं का संबंध किस प्रकार की गति से अधिक है?

Convection currents are more related to which kind of movement?

Explanation opens after your attempt
Correct Answer

A. ऊष्मा से उत्पन्न आंतरिक गतिHeat-driven internal movement

Step 1

Concept

Convection current is movement caused by heat inside Earth. Exam tip: call it internal movement.

Step 2

Why this answer is correct

The correct answer is A. ऊष्मा से उत्पन्न आंतरिक गति / Heat-driven internal movement. Convection current is movement caused by heat inside Earth. Exam tip: call it internal movement.

Step 3

Exam Tip

संवहन धारा पृथ्वी के अंदर ऊष्मा के कारण बनने वाली गति है। परीक्षा में इसे आंतरिक गति कहें।

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