Question

IV. Structured Questions
1. (a) Describe how earthquakes are caused on the surface of the earth.
(b) What is the difference between seismic focus and epicentre?
(c) Give a geographical reason for each of the following:
(i) Most earthquakes occur on account of plate movements.
(ii) Primary waves are the first earthquake waves to be recorded on a seismogram.
(iii) Volcanic activity and earthquakes occur in the same belt.
(d) Explain the three types of earthquake waves.
2. (a)The destructive effects of an earthquake are far more than its constructive effects. Give
reasons to support your answer.
(b) How is the intensity of an earthquake measured?
(c) Is it possible to predict an earthquake? Give reasons to support your answer.
(d) How are earthquakes distributed over the globe?​

Answer 1

Answer:

1. When Lithospheric plates move it causes vibration. This vibration is called as Earthquack.

We can measure earthquake with the help of Seismohraph..