Question

describe the tectonic plates throry class9 pysical features of indis

Answer 1

Earth has four layers. The first is crush and second is mantle. under the mantle there are land masses which are continuously moving around. When the plates collide with each other, they develop some new landfoems which are higher than the lands in surroundings. They also produce vibration but we can't feel it.

Answer 2

Answer: A plausible theory presented by earth scientists to explain the formation of continents and ocean basins and the various land forms is the ‘Theory of Plate Tectonics’. According to the theory, the crust of the earth has been formed out of seven major and some minor tectonic plates.

Class 9 Geography Chapter 2 Physical Features of India Important Questions 1

Fig: Plate Tectonics

According to the earth scientists, millions of years ago, the world comprised of a supercontinent ‘Pangaea’ surrounded by the primeval ocean ‘Panthalassa’. The present continents and intervening oceans were formed due to splitting of the crust into plates due to convection currents and drifting of these plates.