Natural Hazards and Disasters
CBSE · Class 11 · Geography
Complete topic list for Natural Hazards and Disasters in CBSE Class 11 Geography. Key concepts, sub-topics, and what to focus on for board exams.
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Topics in Natural Hazards and Disasters
1. Core Ideas: Hazard, Disaster, and Risk
- A natural hazard is a natural condition or element that can cause harm, such as steep slopes, ocean currents, or extreme desert climate.
- A disaster is an undesirable occurrence that causes or threatens serious disruption of life and property and usually strikes suddenly.
- Hazards and disasters are related but not the same. A hazard has potential for harm; a disaster is the actual harmful event.
2. Disaster Reduction and Management Framework
- The issue of global repercussions of natural disasters was raised at the UN General Assembly in 1989 and formalised at Yokohama in May 1994.
- The World Conference on Natural Disaster Reduction was held in Yokohama from May 23rd to 27th, 1994.
- The conference declared 1990-2000 as the International Decade for Natural Disaster Reduction.
3. Earthquakes in India
- Earthquakes are among the most unpredictable and destructive natural disasters.
- Tectonic earthquakes are the most devastating because they affect a large area.
- The Indian plate moves at 1 cm per year towards the north and northeast and is obstructed by the Eurasian plate.
4. Tsunamis
- Tsunamis are caused by earthquakes or volcanic eruptions that suddenly move the sea floor and displace ocean water.
- Tsunami waves are also called harbour waves or seismic sea waves.
- In deep ocean water, tsunami impact is low because wave-height is limited.
Key Concepts
Central concept: Natural hazards and disasters in India are related but distinct: hazards are potential sources of harm in the natural environment, while disasters are actual damaging events that cause major loss of life, property, and social disruption.
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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