The uppermost layer over the earth’s surface is called :

It is about ___ km. on the continental masses and only __ km. on the ocean floors.

The main mineral constituents of the continental mass are :

The chemical name for Iron is :

Three major types of rocks:

Rock salt is an example of

How many types of rocks on the basis of their formation?

Which one of the following called as primary rocks?

Granite is a hard material and forms cooling magma. Granite is a type of

The oceanic crust mainly consists of

The core has a radius of about

Deccan plateau is made up of

The core is made up of

Rocks which contain fossils are

Which of the layer has the volume about 15% of the earth?

The radius of the earth is

Which of the central layer has very high temperature and pressure?