Question

Which is caused by the sudden movements of the earth?
(a) Volcano (b) Folding (c) Flood plain


NCERT Class 7th Social Science (Our Environment) Chapter 3- Our Changing Earth

Answer 1

a) Volcano................................................

Answer 2

ANSWER:

Volcano

EXPLANATION:

   The lithosphere is usually broken into many plates termed as the Lithospheric plates. These plates tend to move gradually a few millimetres every year.The movement of the Lithospheric plates leads to changes on the Earth’s surface. The movements of the earth are categorised based on the forces that leads to them.

   The forces that act in the Earth’s interior are termed as Endogenic forces and the forces which work on the Earth’s surface are termed as Exogenic forces. Endogenic forces at times generate sudden movements and sometimes generate slow movements. Sudden movements such as volcanoes and earthquakes leads to mass devastation over the Earth’s surface.

   A volcano is an opening or vent in the crust of the Earth from which molten materials erupt suddenly.