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SAI INTERNTIONAL SCHOOL
                                                        Class 8
                                                   Lesson Notes

                                                 Subject- Physics
                                        Ch- Some Natural Phenomena
                                      Subtopic- Earthquake and Causes



                   Earthquakes:  Sudden  shaking  or  trembling  of  earth’s  surface  caused  by
                   disturbance deep inside the Earth’s crust is called earthquake.

                   Causes of earthquake:


                       1.  Movement of tectonic plates is the main cause of an earthquake. Two
                          types of earthquake causing tectonic plates movement is possible.
                              a.  Brushing past
                              b.  Colliding













                       2.  Volcanic eruption
                       3.  Meteorite Strike
                       4.  Nuclear explosion




                   Fault zones in India:

                              1.  Western and central Himalayas
                              2.  Whole North-East region
                              3.  Rann of kutch
                              4.  Rajasthan
                              5.  Indo-Gangetic Plane.
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