Question

Tell whether right or wrong. Correct the wrong statement
(A) The density of various materials is not the same in the interior of the earth.
(B) The core of the earth’s interior is made up of hard rock
(C) Secondary waves cannot pass through outer core.
(D) Continental crust is made up of silica and magnesium

Answer 1

(A) TRUE - The density of materials in the interior of the earth varies as depth increases.

(B) FALSE - Inner core contains iron and outer core contains nickel-iron in liquid form

(C) TRUE - Outer core is in liquid state and the S-waves cannot pass through it.

(D) FALSE- Continental crust is made of metamorphic and granitic rocks

Answer 2

(A) Right (B) Wrong (C) Right (D) Wrong

Explanation:

(A) Right – The density of materials in the "interior of the earth" varies as the depth varies. The depth increases rapidly. Hence, the density of various materials isn’t the same in the interior of the earth.

(B) Wrong – Inner core contains iron and the outer core contains nickel-iron. Here, the nickel-iron is in liquid form. Hence, the core of the earth’s interior is not made of hard rock.

(C) Right – Outer core is in a liquid state and the S-waves cannot pass through it.

(D) Wrong - Continental crust is made of metamorphic and granitic rocks, not silica and magnesium.