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

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महाद्वीपीय विस्थापन के बाद के अध्ययनों का मुख्य उद्देश्य क्या था?

What was the main purpose of post-drift studies?

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A. महाद्वीपों की गति के कारणों को बेहतर समझनाTo better understand the causes of continental movement

Step 1

Concept

Post-drift studies tried to explain Wegener's ideas with new evidence and mechanisms. Exam tip: link them with development of the theory.

Step 2

Why this answer is correct

The correct answer is A. महाद्वीपों की गति के कारणों को बेहतर समझना / To better understand the causes of continental movement. Post-drift studies tried to explain Wegener's ideas with new evidence and mechanisms. Exam tip: link them with development of the theory.

Step 3

Exam Tip

बाद के अध्ययनों ने वेगनर के विचारों को नए प्रमाणों और तंत्र से समझाने का प्रयास किया। परीक्षा में इन्हें सिद्धांत के विकास से जोड़ें।

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संवहन धारा सिद्धांत किस वैज्ञानिक से प्रमुख रूप से जुड़ा है?

Convectional Current Theory is mainly associated with which scientist?

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Correct Answer

B. आर्थर होम्सArthur Holmes

Step 1

Concept

Arthur Holmes suggested the possibility of convection currents in the mantle. Exam tip: connect Holmes with convection currents.

Step 2

Why this answer is correct

The correct answer is B. आर्थर होम्स / Arthur Holmes. Arthur Holmes suggested the possibility of convection currents in the mantle. Exam tip: connect Holmes with convection currents.

Step 3

Exam Tip

आर्थर होम्स ने मेंटल में संवहन धाराओं की संभावना बताई। परीक्षा में होम्स को संवहन धारा से जोड़ें।

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संवहन धाराएँ पृथ्वी के किस भाग में मानी जाती हैं?

Convection currents are considered to occur in which part of the Earth?

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Correct Answer

C. मेंटलMantle

Step 1

Concept

Convection currents are mainly considered in the mantle. Exam tip: connect mantle with internal movement.

Step 2

Why this answer is correct

The correct answer is C. मेंटल / Mantle. Convection currents are mainly considered in the mantle. Exam tip: connect mantle with internal movement.

Step 3

Exam Tip

संवहन धाराएँ मुख्य रूप से मेंटल में मानी जाती हैं। परीक्षा में मेंटल को आंतरिक गति से जोड़ें।

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संवहन धारा सिद्धांत के अनुसार मेंटल में गर्म पदार्थ क्या करता है?

According to Convectional Current Theory what does hot material in the mantle do?

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Correct Answer

D. ऊपर उठता हैRises upward

Step 1

Concept

Hot material becomes lighter and rises while cooler material sinks. Exam tip: remember hot rises and cold sinks.

Step 2

Why this answer is correct

The correct answer is D. ऊपर उठता है / Rises upward. Hot material becomes lighter and rises while cooler material sinks. Exam tip: remember hot rises and cold sinks.

Step 3

Exam Tip

गर्म पदार्थ हल्का होकर ऊपर उठता है और ठंडा पदार्थ नीचे जाता है। परीक्षा में गर्म ऊपर और ठंडा नीचे याद रखें।

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संवहन धाराओं के बनने का प्रमुख कारण क्या माना गया?

What is considered the main cause of convection currents?

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Correct Answer

A. पृथ्वी के भीतर तापीय अंतरThermal differences inside the Earth

Step 1

Concept

Temperature differences inside the Earth cause material to move up and down. Exam tip: treat thermal difference as the main cause.

Step 2

Why this answer is correct

The correct answer is A. पृथ्वी के भीतर तापीय अंतर / Thermal differences inside the Earth. Temperature differences inside the Earth cause material to move up and down. Exam tip: treat thermal difference as the main cause.

Step 3

Exam Tip

पृथ्वी के अंदर ताप के अंतर से पदार्थ ऊपर नीचे गति करता है। परीक्षा में तापीय अंतर को मुख्य कारण मानें।

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आर्थर होम्स ने संवहन धाराओं को किसके लिए संभावित बल माना?

Arthur Holmes considered convection currents as a possible force for what?

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Correct Answer

B. महाद्वीपों और प्लेटों की गति के लिएMovement of continents and plates

Step 1

Concept

Holmes considered convection currents a possible driving mechanism for landmass movement. Exam tip: link it with Wegener's weakness.

Step 2

Why this answer is correct

The correct answer is B. महाद्वीपों और प्लेटों की गति के लिए / Movement of continents and plates. Holmes considered convection currents a possible driving mechanism for landmass movement. Exam tip: link it with Wegener's weakness.

Step 3

Exam Tip

होम्स ने संवहन धाराओं को भूखंडीय गति का संभावित चालक तंत्र माना। परीक्षा में इसे वेगनर की कमी से जोड़ें।

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वेगनर के सिद्धांत की कौन सी कमी संवहन धारा सिद्धांत ने कम करने की कोशिश की?

Which weakness of Wegener's theory did Convectional Current Theory try to reduce?

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Correct Answer

C. चालक बल की कमीLack of driving force

Step 1

Concept

Wegener did not clearly explain a sufficient driving force. Exam tip: connect convection current with driving mechanism.

Step 2

Why this answer is correct

The correct answer is C. चालक बल की कमी / Lack of driving force. Wegener did not clearly explain a sufficient driving force. Exam tip: connect convection current with driving mechanism.

Step 3

Exam Tip

वेगनर ने गति के लिए पर्याप्त बल स्पष्ट नहीं किया था। परीक्षा में संवहन धारा को चालक तंत्र से जोड़ें।

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मेंटल में ठंडा और भारी पदार्थ क्या करता है?

What does cool and heavy material do in the mantle?

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Correct Answer

D. नीचे धंसता हैSinks downward

Step 1

Concept

Cool material becomes heavier and sinks, forming a convection cycle. Exam tip: remember this cycle.

Step 2

Why this answer is correct

The correct answer is D. नीचे धंसता है / Sinks downward. Cool material becomes heavier and sinks, forming a convection cycle. Exam tip: remember this cycle.

Step 3

Exam Tip

ठंडा पदार्थ भारी होकर नीचे जाता है और संवहन चक्र बनाता है। परीक्षा में यह चक्र याद रखें।

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संवहन धारा का सरल अर्थ क्या है?

What is the simple meaning of convection current?

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Correct Answer

A. ताप के कारण पदार्थ की चक्रीय गतिCircular movement of material due to heat

Step 1

Concept

In convection hot material rises and cool material sinks. Exam tip: understand it as heat-based movement.

Step 2

Why this answer is correct

The correct answer is A. ताप के कारण पदार्थ की चक्रीय गति / Circular movement of material due to heat. In convection hot material rises and cool material sinks. Exam tip: understand it as heat-based movement.

Step 3

Exam Tip

संवहन में गर्म पदार्थ ऊपर और ठंडा पदार्थ नीचे जाता है। परीक्षा में इसे ताप आधारित गति समझें।

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पृथ्वी के अंदर ऊष्मा का एक प्रमुख स्रोत क्या माना जाता है?

What is considered one major source of heat inside the Earth?

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Correct Answer

B. रेडियोधर्मी तत्वों का क्षयDecay of radioactive elements

Step 1

Concept

Decay of radioactive elements produces heat inside the Earth. Exam tip: remember the source of internal heat.

Step 2

Why this answer is correct

The correct answer is B. रेडियोधर्मी तत्वों का क्षय / Decay of radioactive elements. Decay of radioactive elements produces heat inside the Earth. Exam tip: remember the source of internal heat.

Step 3

Exam Tip

रेडियोधर्मी तत्वों के क्षय से पृथ्वी के अंदर ऊष्मा उत्पन्न होती है। परीक्षा में आंतरिक ऊष्मा का स्रोत याद रखें।

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