Chapter 4 of 17
Revision Notes
Earthquake and Volcanoes — Revision Notes
Gujarat Board · Class 11 · Geography
Earthquake and Volcanoes revision notes for Gujarat Board Class 11 Geography: 4 topics in quick points. Includes Earth Movements and Introduction.
42 questions20 flashcards5 concepts
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Key Topics to Revise
1
Earth Movements and Introduction
- Earth's interior contains great heat and pressure from overlying rock layers
- Heat and pressure changes cause expansion/contraction in rock matter
- Earth movements can be slow or sudden
2
Earthquake Fundamentals
- Earthquake: Wave-like vibrations from disturbance in rocks within Earth's interior
- Occur suddenly, accidentally, and rapidly
- Example: Bhuj earthquake (26 January 2001) caused devastation in minutes
3
Seismology and Seismic Waves
- Seismology: Science studying earthquakes (from Greek 'Seismos')
- Seismograph: Instrument measuring earthquake intensity with hanging pendulum
- Indian seismograph centers: Mumbai, Kolkata, Delhi, Dehradun, Hyderabad, Rajkot, Vadodara, Gandhinagar
4
Causes of Earthquakes
- Six main causes: Faulting, Volcanic eruption, Isostasy, Water vapor, Human activities, Natural events
- Faulting: Most common cause due to tectonic movements creating tension/compression
- Volcanic eruption: Strong earthquakes within 150-200 km of volcano
Get complete notes with diagrams and examples
Full NotesKey Concepts
Movements in Earth's crust caused byFocus is the point inside EarthThree types of wavesSeismology is the scientific studySix main causes
Frequently Asked Questions
What are the important topics in Earthquake and Volcanoes for Gujarat Board Class 11 Geography?
Key topics in Earthquake and Volcanoes include Earth Movements and Introduction, Earthquake Fundamentals, Seismology and Seismic Waves, Causes of Earthquakes. Study these first, then practise questions on each for Class 11 exams.
How should I revise Earthquake and Volcanoes for Class 11 exams?
Learn the core ideas first, then work through the 42 practice questions on Earthquake and Volcanoes. Revise 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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