Question

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

NCERT Class 7th Social Science (Our Environment) Chapter 2 Inside our Earth

Answer 1

Explanation:

core- innermost layer

minerals-has definite chemical composition

rocks- used for roads and buildings

clay- changes into slate

sial- made of silicon and alumina

Answer 2

(i)-e, (ii)-d, (iii)-b, (iv)-f, (v)-c

Explanation:

(i)Core:

• (e) The core is the innermost geologic layer of planet Earth.

(ii) Minerals:

• (d) The Minerals have a definite chemical composition .

(iii) Rocks:

• (b) Rocks are generally used for roads and buildings.

(iv) Clay:

• (f) the Clay Changes into slate.

(v) Sial:

• (c) The sial is Made of silicon and alumina.

hence, (i)-e, (ii)-d, (iii)-b, (iv)-f, (v)-c is the correct match.