Inside Our Earth

The earth, our homeland is a __________ planet.

The things present inside the earth are :

• Crust

• Mantle

• Core

• Animals

The deepest mine in the world, is in ___________.

Just like a/an ________ ,the earth is made up of several concentric layers with one inside another.

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

• Crust

• Mantle

• Core

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

The main mineral constituents of the continental mass are :

• silicon and aluminium

• silica and nickel

• silica and alumina

• silicon and magnesium

"sima" is the acronym for :

Just beneath the crust is the _________ which extends up to a depth of 2900 km. below the crust.

The chemical name for Iron is :

• Fe - Ferrous

• Fe - Feride

• Iron oxide

• Steel