Who propounded the Theory of plate tectonics? Mention some of the major features of the theory.

Alfred Wegener propounded the theory of plate tectonics in 1920.

i. Earth has many layers of plates beneath it.

ii. Tectonic plates are present in Earth’s crust and uppermost mantle.

iii. There are two types of material of Plates: Oceanic crust and Continental crust.

iv. These plates travel with the speed of few centimetres per year.

v. There is a term called convection current which moves these plates in a different direction.