geomorphology & earth landforms section 10 MCQ Questions & Answers Detailed Explanation

Question : 1

Which of the following are correct?

1. In the behaviour of earthquake waves, we study only three types of waves and they are ‘S’ - Surface waves, ‘L’ - Longitudinal waves and ‘P’ transverse.
2. The velocity of P - waves and S - waves increase with the depth throughout.
3. L - waves do not pass through the mantle because it is a liquid layer.
4. S - waves persists only to the surface and do not penetrate deep into the earth.

a) 1, 2, 3 and 4

b) 2 and 4

c) None

d) 1 and 3

Question : 2

The theory of plate tectonics was not initially widely accepted because:

a) fossils on South America and Africa did not match.

b) land bridges would have blocked plate movement.

c) Ocean floor mapping showed that older rocks occur away from mid-ocean ridges.

d) rocks of the Earths’s crust were considered too stiff for continents to move through them.

Question : 3

Block Mountains are basically of two types, e. g.

1. tilled block mountains having one steep side represented by fault scarp and one gentle side, and;
2. lifted block mountains represent real horst and are characterized by flattened summit of tabular shape and very steep side slopes represented by two boundary fault scarps. Block Mountains are also called Horst Mountains.

a) 1 and 2

b) 1 only

c) None

d) 2 only

Question : 4

When does the moon come between the Sun and earth?

a) Sidereal day

b) Lunar eclipse

c) Full moon day

d) Solar eclipse