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Describe the Theory of Plate Tectonics.

Ans. A plausible theory presented by earth scientists to explain the formation of continents and ocean
basins and the various landforms 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.
According to the earth scientists, millions of years ago, the world comprised of a supercontinent
‘Pangaea’ surrounded by the primeval ocean ‘Panthalasa’. 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
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