Match the following.

(i) Core	(a) Earth’s surface
(ii) Minerals	(b) Used for roads and buildings
(iii) Rocks	(c) Made of silicon and alumina
(iv) Clay	(d) Has definite chemical composition
(v) Sial	(e) Innermost layer
	(f) Changes into slate
	(g) Process of transformation of the rock

(i) Core (e) Innermost layer

Core is the innermost layer of the earth.

(ii) Minerals (d) Has definite chemical composition

Minerals are naturally occurring substances which have certain physical properties and definite chemical composition.

(iii) Rocks (b) Used for roads and buildings

Rocks are commonly used for the construction of roads and buildings.

(iv) Clay (f) Changes into slate

Under great heat and pressure, clay transforms to slate (a metamorphic rock).

(v) Sail (a) Earth’s surface

Sail is composed of silica and alumina that is found on the surface of the earth.