Identify the rock  with the image and hint 

Hint : It is also known as primary rocks 

The  continental  crust is made up of :

This layer is called barysphere

What is this cycle called : 

The oceanic crust is made up of :

The opening  of the volcano is called

A funnel -- shaped  hollow at the top of the cone is called

Mention the year of bhuj earthquake

This is the living volcanoes 

THis is the sleeping volcanoes

This is called the dead  volcanoes 

Which of  the  following gas present in the atmosphere is important for the growth of plants ? 

In which layer ionosphere  is present 

The  height of the  atmosphere above the mean sea level is about