Sudden shaking or trembling of earth is called Earthquake.
It lasts for a very short time.
It is caused by deep disturbance within the earth's crust.
Damages caused by Earthquake
Damage to Building and Property
Many buildings, dams,bridges are damaged because of earthquake
Loss of Life
Many plants, animals and human beings die because of earthquake
Cause Floods, Tsunamis,Landslides
Earthquakes cause sea level to rise causing Tsunamis
Earthquake in mountain areas may cause rocks to fall causing landslide
How are Earthquakes Caused?
It is caused by brushing or collision of different plates of earth's crust.
This brushing or collision cause disturbance which leads to earthquake
Earth has different layers like inner core, outer core, mantle and crust.
The outermost layer is called the crust
The crust is not in one piece
It is fragmented into different parts
These parts are called plates
These plates are not stationary(they keep on moving)
When one plate comes near another plate, it either collides with it or brushes apart
This brushing or collision causes disturbance which leads to earthquake
Note : Tremors on earth can also be caused when a volcano erupts or a big meteorite hits the earth or an underground nuclear explosion is carried out.