due to a volcanic eruption or an earthquake on the ocean floor, powerful waves of large size, and extraordinary wavelengh are created. These are called tsunami.
Those events which take place due to direct or indirect, knowingly or unknowingly done by men, unawareness or ignorance and failure of human machinery, etc. which may cause heavy damage to human lives and property. Such events are called ‘man-induced disasters’.
A cyclone develops due to the unequal atmospheric pressure. A cyclone develops when a high pressure develops near the coastal area and a low pressure develops over sea or an ocean.
What is meant by ‘Flood’? Where does it affect most?
Answer
During monsoon, the water which comes $5$ gushing in the river due to incessant rain in the upper course of the river, or due to breaking of a dam or by melting of snow in the snow-clad regions, is called ‘Flood’. The lower regions along the river bank are most affected. So there is large scale damage to the lives and property there.
During rainy season, if there is no rain or the rain is in insignificant quantity, an intense shortage of water develops. This situation is called ‘Drought’.
Give an example of the devastating effects of tsunami.
Answer
On $26$ December, $2004$, the fierce tsunami. which occurred in the Indian Ocean took a toll of about $2$ lakh people of South-east Asian countries including Thailand, Indonesia, India and Sri Lanka.
Where and in which attack by the terrorists, a total of $141$ people, including $132$ innocent children died?
Answer
In the attack by the terrorists in December, $2014$ on the Army School located in Peshawar Cantonment, a total of $141$ people including $132$ innocent children died.
One economic effect of disasters : A huge Capital is needed to restoration after the disaster. As a result, the ongoing development works have to be slowed down.
‘Tsunami’ is a Japanese word meaning destructive waves. Due to the volcanic eruption or an earthquake on the sea floor, very powerful waves of large size and of unusual wavelength are created on the sea surface. These are called ‘Tsunami’.