Question

How Himalayas are formed? class +1 question

Answer 1

When the earth was young, there was only one continent known as the Pangea which then broke up. The southern part of this land was called Gondwana which again split into different land masses. One of those land mass which was called as the Indo-Australian plate which drifted towards the north in the northern hemisphere. As it was drifting, a part of the plate when to the north whereas the another broken part went towards the east (which formed Australia later). The land that went to the North collided with the Asian plate and caused the deposition of Tethys sea to cause fold over the continent. This land mass is India today. This fold caused the formation of the young Himalayan chain.

Answer 2

Earth's lithosphere is the outer shell of Earth's sphere that contains crust layer and other layers.  In this lithosphere, there exist  7 to 8 tectonic plates. These plates are huge pieces of mass. 

These tectonic plates are mobile but very slowly. The reasons are due to improper and unbalanced pressure, heat, temperature, liquid mass, presence of gases, volcanic matter etc. They move at 10cm /year approx.

  When these tectonic plates collide with each other at the boundaries, either mountains or volcanoes, or oceanic trench etc. happen.
  
  In case of The Himalayas, the Eurasian tectonic plate and Indo-Australian tectonic plate have collided in a Convergent way that growth of mountain range happened.