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Natural Hazards, Causes and Management — Revision Notes

ICSE · Class 11 · Geography

Natural Hazards, Causes and Management revision notes for ICSE Class 11 Geography: 4 topics in quick points. Part of the ICSE Class 11 Geography syllabus.

65 questions42 flashcards4 formulas & key relations5 concepts

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Key Topics to Revise

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1. Hazards and Disasters

  • Hazards are phenomena that pose a threat to people, structures, or economic assets and may cause a disaster.
  • A natural hazard is a natural phenomenon near people and property that can cause harm due to geographical, biological, geological, seismic, hydrological, or meteorological conditions.
  • Disaster is a serious disruption of society causing widespread human, material, or environmental losses beyond the ability of the affected society to cope using its own resources.
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2. Classification of Natural Disasters

  • Natural disasters are classified by origin.
  • Atmospheric disasters include thunderstorms, tornadoes, tropical cyclones, drought, and hailstorm.
  • Terrestrial disasters include earthquakes, volcanoes, landslides, and soil erosion.
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3. Volcanoes and Their Hazards

  • Volcanic eruptions can destroy life and property through hot lava, volcanic materials, fires, river blockage, floods, and climatic changes.
  • The Laki fissure eruption in Iceland in 1783 was extremely violent and the lava flow travelled 350 km.
  • The Laki eruption killed about one-fourth of Iceland's population.
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4. Earthquakes: Magnitude, Intensity, and Risk

  • Earthquakes are tremors produced by vibratory waves passing through the rocks of the earth.
  • They may be caused by tectonic forces, volcanic eruptions, rock bursts, subsidence in mines, and impounding of reservoirs.
  • Magnitude is measured by the Richter scale.

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Full Notes

Key Concepts

A hazard is a threatA disaster is a serious disruptionVulnerability is the extent toMagnitude measures the seismic energy releasedThe Richter scale was developed by

Frequently Asked Questions

What are the important topics in Natural Hazards, Causes and Management for ICSE Class 11 Geography?
Key topics in Natural Hazards, Causes and Management include Hazards and Disasters, Classification of Natural Disasters, Volcanoes and Their Hazards, Earthquakes: Magnitude, Intensity, and Risk. Study these first, then practise questions on each for Class 11 exams.
How should I revise Natural Hazards, Causes and Management for Class 11 exams?
Learn the core ideas first, then work through the 65 practice questions on Natural Hazards, Causes and Management. 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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All ICSE Class 11 Geography Revision Notes

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