TOP 10 QUESTIONS FOR NDA AND CDS 2021

 Important MCQ

 1. Lithosphere consist of 

[a]Upper and Lower mantle

[b]crust and core

c. crust and uppermost solid mantle

d. mantle and core

2. According to Geo- scientists,the shape of the earth is 

a. Round

b. spherical

c. Close to that of the sphere

d. an oblate ellipsoid

3. which of the following elements are found in highest and lowest quantities resp. in the crust of the earth

a. o2 and silicon 

b. calciun and sodium

c. sodium and magnesium

d. oxygen and mgnesium

4. which of the following is /are direct source of in formation about the interior of the Earth ?

1. Earthquake Wave                 2.volcano

3.Gravitational Force _.           4. Earth magnetism

select the correct answer using the code given below

(a) 1 and 2 only

(b) .2 only

(3) 3 and 4 only

(4) 1,2, 3 and 4

5.The most abundant metal in the earth crust-is:

(a) calcium .

(b) Aluminum

(C) Iron

(d) magnesium

6. which greek philophosper coined the term "Geography" in the 3rd Century BCE?

(a) Euclid 

(b) Plato 

(C) Eratosthenes 

(d) Clio

7. The fact that the planets move around the sun I not in the Circles but in ellipses, was first demonstrated by

(a) Galileo 

(b) martin Luther 

(C) Johannes Kepler 

(d) Copernicus

8. which of the following theory explain the origin of the Universe?

(a) Nebular Hypothesis

 (b) Binary Theory 

(C) Big Bang Theory 

(d) Planetesimal Theory

9.How many degrees does the earth rotate about its own axis in one hour ?

(a)24

 (b) 15

 (C) 20

 (d) 10

(10) What is the periodicity of Halley's Comet?

(a) 30 -31 years 

(b) 45-46 years(s)

 (C)57 years

 (d) 75-76 years