Question

What are called plates? How many plates are there on earth

Answer 1

Tectonic plates are pieces of Earth's crust and uppermost mantle, together referred to as the lithosphere. The plates are around 100 km (62 mi) thick and consist of two principal types of material: oceanic crust (also called sima from silicon and magnesium) and continental crust (sial from silicon and aluminium)

Answer 2

A Lithospheric plate also called ”Techtonic Plates" is very huge, irregularly (up-down) shaped piece of solid rock, composed of both continental and oceanic surrounding. 

There are 7 Major plates, that are:
♦ Eurasian plate,
♦ Pacific plate,
♦ Indo-austarlian plate,
♦ African plate ,
♦ Antarctic plate,
♦ South American plate and
♦ North American plate.

Apart from these, there are 26 other Minor plates, but the major the these Seven ones listed above.


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