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

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

The main mineral constituents of the continental mass are :

"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 :

The radius of the earth is ____ km

Three major types of rocks:

When the molten magma cools, it becomes solid. Rocks thus formed are called _________ rocks.

Igneous is a _____ word meaning ______

_____ is actually fiery red molten magma coming out from the interior of the earth on its surface.

Sometimes the molten magma cools down deep inside the earth’s crust. Solid rocks so formed are called ________ igneous rocks

_______ is the example of intrusive sedimentary rock.

Sedimentary is a word derived from _____ word ______

The sediments fuse together with this natural cementing material called ______

Rock salt is an example of