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

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Post-drift studies and Convectional Current Theory Practice Questions

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पोस्ट ड्रिफ्ट अध्ययनों का संबंध किस मुख्य विचार से है?

Post-drift studies are related to which main idea?

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Correct Answer

A. महाद्वीपीय गति की आगे की समझFurther understanding of continental movement

Step 1

Concept

These studies searched for new evidence and causes after continental drift. Exam tip: understand post-drift as later development.

Step 2

Why this answer is correct

The correct answer is A. महाद्वीपीय गति की आगे की समझ / Further understanding of continental movement. These studies searched for new evidence and causes after continental drift. Exam tip: understand post-drift as later development.

Step 3

Exam Tip

इन अध्ययनों ने महाद्वीपीय विस्थापन के बाद नए प्रमाण और कारण खोजे। परीक्षा में पोस्ट ड्रिफ्ट को बाद का विकास समझें।

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संवहन धारा सिद्धांत किस प्रक्रिया पर आधारित है?

Convectional Current Theory is based on which process?

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Correct Answer

B. ताप से पदार्थ की ऊपर नीचे गतिUp and down movement of material due to heat

Step 1

Concept

In convection hot material rises and cooler material sinks. Exam tip: treat it as a heat-based cycle.

Step 2

Why this answer is correct

The correct answer is B. ताप से पदार्थ की ऊपर नीचे गति / Up and down movement of material due to heat. In convection hot material rises and cooler material sinks. Exam tip: treat it as a heat-based cycle.

Step 3

Exam Tip

संवहन में गर्म पदार्थ ऊपर उठता है और ठंडा पदार्थ नीचे जाता है। परीक्षा में इसे ताप आधारित चक्र मानें।

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आर्थर होम्स ने संवहन धाराओं को कहाँ सक्रिय माना?

Where did Arthur Holmes consider convection currents active?

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Correct Answer

C. पृथ्वी के मेंटल मेंIn the Earth's mantle

Step 1

Concept

Holmes tried to explain landmass movement through convection currents in the mantle. Exam tip: remember Holmes and mantle together.

Step 2

Why this answer is correct

The correct answer is C. पृथ्वी के मेंटल में / In the Earth's mantle. Holmes tried to explain landmass movement through convection currents in the mantle. Exam tip: remember Holmes and mantle together.

Step 3

Exam Tip

होम्स ने मेंटल में संवहन धाराओं से भूभागों की गति समझाने का प्रयास किया। परीक्षा में होम्स और मेंटल को साथ याद रखें।

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गर्म मेंटल पदार्थ संवहन चक्र में सामान्यतः क्या करता है?

What does hot mantle material generally do in a convection cycle?

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Correct Answer

D. ऊपर उठता हैRises upward

Step 1

Concept

Hot material becomes lighter and rises upward. Exam tip: remember hot up and cool down.

Step 2

Why this answer is correct

The correct answer is D. ऊपर उठता है / Rises upward. Hot material becomes lighter and rises upward. Exam tip: remember hot up and cool down.

Step 3

Exam Tip

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

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ठंडा मेंटल पदार्थ संवहन चक्र में सामान्यतः किस दिशा में जाता है?

In which direction does cooler mantle material generally move in a convection cycle?

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Correct Answer

A. नीचे की ओरDownward

Step 1

Concept

Cooler material becomes denser and sinks downward. Exam tip: remember the relation between density and temperature.

Step 2

Why this answer is correct

The correct answer is A. नीचे की ओर / Downward. Cooler material becomes denser and sinks downward. Exam tip: remember the relation between density and temperature.

Step 3

Exam Tip

ठंडा पदार्थ भारी होकर नीचे धंसता है। परीक्षा में घनत्व और ताप का संबंध याद रखें।

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संवहन धाराएँ किस कारण बनती हैं?

Convection currents form due to what?

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Correct Answer

B. तापीय अंतरThermal difference

Step 1

Concept

Thermal difference makes material move up and down. Exam tip: write heat difference as the cause of convection.

Step 2

Why this answer is correct

The correct answer is B. तापीय अंतर / Thermal difference. Thermal difference makes material move up and down. Exam tip: write heat difference as the cause of convection.

Step 3

Exam Tip

तापीय अंतर पदार्थ को ऊपर और नीचे चलाता है। परीक्षा में संवहन का कारण ऊष्मा अंतर लिखें।

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वेगनर के सिद्धांत में कौन सी कमी बाद के अध्ययनों से भरने की कोशिश हुई?

Which weakness of Wegener's theory did later studies try to fill?

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Correct Answer

C. गति कराने वाले बल की कमीLack of a driving force

Step 1

Concept

Wegener did not fully explain the cause of movement. Exam tip: link later studies with driving mechanism.

Step 2

Why this answer is correct

The correct answer is C. गति कराने वाले बल की कमी / Lack of a driving force. Wegener did not fully explain the cause of movement. Exam tip: link later studies with driving mechanism.

Step 3

Exam Tip

वेगनर ने गति का कारण पूरी तरह स्पष्ट नहीं किया था। परीक्षा में बाद के अध्ययन को चालक तंत्र से जोड़ें।

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पृथ्वी के अंदर ऊष्मा का एक महत्वपूर्ण स्रोत क्या है?

What is one important source of heat inside the Earth?

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Correct Answer

D. रेडियोधर्मी तत्वों का क्षयDecay of radioactive elements

Step 1

Concept

Radioactive decay can produce heat inside the Earth. Exam tip: remember the source of internal heat.

Step 2

Why this answer is correct

The correct answer is D. रेडियोधर्मी तत्वों का क्षय / Decay of radioactive elements. Radioactive decay can produce heat inside the Earth. Exam tip: remember the source of internal heat.

Step 3

Exam Tip

रेडियोधर्मी क्षय पृथ्वी के अंदर ऊष्मा पैदा कर सकता है। परीक्षा में आंतरिक ऊष्मा का स्रोत याद रखें।

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संवहन धारा सिद्धांत में मेंटल की गति कैसी मानी जाती है?

What type of movement is assumed in the mantle in Convectional Current Theory?

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Correct Answer

A. बहुत धीमी और दीर्घकालिकVery slow and long-term

Step 1

Concept

Mantle movement affects over a very long time. Exam tip: keep geological time in mind.

Step 2

Why this answer is correct

The correct answer is A. बहुत धीमी और दीर्घकालिक / Very slow and long-term. Mantle movement affects over a very long time. Exam tip: keep geological time in mind.

Step 3

Exam Tip

मेंटल की गति बहुत लंबे समय में प्रभाव डालती है। परीक्षा में भूवैज्ञानिक समय का ध्यान रखें।

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मध्य महासागरीय कटक किस स्थान पर पाए जाते हैं?

Where are mid-oceanic ridges found?

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Correct Answer

B. महासागर तल परOn the ocean floor

Step 1

Concept

Mid-oceanic ridges are long mountain chains on the ocean floor. Exam tip: treat them as oceanic landforms.

Step 2

Why this answer is correct

The correct answer is B. महासागर तल पर / On the ocean floor. Mid-oceanic ridges are long mountain chains on the ocean floor. Exam tip: treat them as oceanic landforms.

Step 3

Exam Tip

मध्य महासागरीय कटक समुद्र तल की लंबी पर्वतमालाएँ हैं। परीक्षा में इन्हें महासागरीय स्थलरूप मानें।

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