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Interior of the Earth

Jammu & Kashmir Board · Class 11 · Geography

Quick revision notes for Interior of the Earth — Jammu & Kashmir Board Class 11 Geography. Key concepts, formulas, and definitions for last-minute revision.

76 questions90 flashcards5 concepts

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Key Topics to Revise

1

1. Sources of Information About the Interior

  • The earth's radius is about 6,378 km.
  • Direct sources include surface rocks, mining samples, deep drilling, and volcanic materials.
  • Gold mines in South Africa reach depths of 3-4 km.
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2. Earthquake Basics

  • An earthquake is the shaking of the earth caused by the release of energy.
  • The point where energy is released is called the focus or hypocentre.
  • The point on the surface nearest to the focus is called the epicentre.
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3. Types and Behaviour of Earthquake Waves

  • Earthquake waves are of two main types: body waves and surface waves.
  • Body waves are generated at the focus and travel through the body of the earth.
  • Surface waves are generated when body waves interact with surface rocks.
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4. Shadow Zone and Seismograph Patterns

  • A shadow zone is a region where earthquake waves are not recorded.
  • For both P and S waves, the shadow zone lies between 105 and 145 degrees from the epicentre.
  • Seismographs within 105 degrees record both P and S waves.

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Full Notes

Key Concepts

Information about the interior comes fromThe focus or hypocentre isPSSurface waves are produced when body

Frequently Asked Questions

What are the important topics in Interior of the Earth for Jammu & Kashmir Board Class 11 Geography?
Interior of the Earth covers several key topics that are frequently asked in Jammu & Kashmir Board Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Interior of the Earth — Jammu & Kashmir Board Class 11 Geography?
Understand the core concepts first, then work through the 76 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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