A tsunami is a series of enormous ocean waves caused by earthquakes, underwater landslides, volcanic eruptions or asteroids. Tsunamis can travel 700-800 km per hour, with waves 10-30 meter high. It causes flooding and disrupts transportation, power, communications, and water supply.
What is tsunami 9th class?
Tsunami is a phenomenon where a series of strong waves that are responsible for the surge in water sometimes reach the heights in many meters. This is a natural disaster that is caused due to the volcano eruption in the ocean beds. Also, a phenomenon like landslides and earthquakes contributes to reasons for a tsunami.
What are the major types of hazards samacheer?
Samacheer Kalvi 8th Social Science Hazards Text Book Back Questions and Answers
|List I||List II|
|1. Primary pollutant||d. Oxides of sulphur|
|2. Hazardous waste||c. Outdated drugs|
|3. Earthquake||b. Tsunami|
|4. Meteorological drought||e. Reduction in rainfall|
What is a volcano Samacheer Kalvi?
Answer: A volcano is a vent or an opening in the earth’s crust through which hot magma erupts from deep below the surface. The opening is usually circular in form. Question 6. Name the three types of volcanoes based on shape.
What are the six concepts of disaster management cycle Samacheer Kalvi?
Answer: Preparation, Mitigation, Preparedness, Response, Recovery and Development are the six Disaster management cycles.
What is the biggest tsunami ever?
How are tsunamis named?
Tsunamis have no names, at least not yet. Nor do earthquakes or floods. … The system of naming of Atlantic cyclones (known as hurricanes or typhoons), is a fairly old practice, but giving names to cyclones that originate in the northern Indian Ocean and affect South Asian countries began only at the turn of this century.
What are the major types of hazards?
The six main categories of hazards are:
- Biological. Biological hazards include viruses, bacteria, insects, animals, etc., that can cause adverse health impacts. …
- Chemical. Chemical hazards are hazardous substances that can cause harm. …
- Physical. …
- Safety. …
- Ergonomic. …
What is a hazard in science?
Hazards. A hazard is something that could cause: harm to someone. damage to something. adverse health effects, either straightaway or later.
What type of hazard is landslide?
Landslides include a wide range of phenomena involving downslope ground movement, such as rockfalls, deep slope failure, shallow debris flows, and avalanches. Gravity acting on a slope is the primary cause of landslides, but there are other important and dynamic factors that serve as triggers.
Where is a magma found?
Magma originates in the lower part of the Earth’s crust and in the upper portion of the mantle. Most of the mantle and crust are solid, so the presence of magma is crucial to understanding the geology and morphology of the mantle.
What is the meaning social science?
Social science is, in its broadest sense, the study of society and the manner in which people behave and influence the world around us.
What are the effects of volcanoes?
Fast-moving lava can kill people and falling ash can make it hard for them to breathe. They can also die from famine, fires and earthquakes which can be related to volcanoes. People can lose their possessions as volcanoes can destroy houses, roads and fields. Lava can kill plants and animals too.
What are the six concepts of Disaster management?
Preparation, Mitigation, Preparedness, Response, Recovery and Development are the six Disaster management cycles.
What is the difference between earthquake and tsunami?
An earthquake is a trembling movement of the earth’s crust. A tsunami (pronounced soo-NAHM-ee) is a series of huge waves that occur as the result of a violent underwater disturbance, such as an earthquake or volcanic eruption. …
What is disaster cycle PDF?
•The Disaster management cycle illustrates the ongoing process. by which governments, businesses, and civil society plan for. and reduce the impact of disasters, react during and. immediately following a disaster, and take steps to recover. after a disaster has occurred.