universe & solar system section 4 MCQ Questions & Answers Detailed Explanation

Question : 1

Which one of the following is the time required for the earth to return to a given point in its orbit with reference to fixed stars called ?

a) Tropical year

b) Sidereal year

c) Solar year

d) Lunar year

Question : 2

Cycle of sun spots is

a) 11 years

b) 12 years

c) 10 years

d) 9 years

Question : 3

The Earth is an oblate spheroid and not a perfect sphere. This is because

1. The Earth has a rotational motion and the rotational speed increases as one goes from the poles towards the equator.
2. The equator experiences greater gravitational pull from the sun.
3. The intensity of sunlight received at the equator is greater than that at the poles.

a) Only 3

b) All of these

c) 1 and 2

d) Only 1

Question : 4

Albedo effect would be relatively higher in

a) noon

b) late evening only

c) early morning only

d) early morning and late evening

Question : 5

What is most important about the Arctic and the Antarctic circles ?

a) Both areas frozen continents

b) Both regions are uninhabited

c) The days and nights are never more than 24 hours long here

d) Within these circle only can the days and nights be longer than 24 hours

Question : 6

Consider the following statements:

1. Since Venus is seen in the East in morning and in the West in evening. It is called ‘Morning star’ as well as ‘Evening star’.
2. The Earth looks blue when seen from the space due to the presence of large amount of water, hence it is called ‘Blue Planet’.

a) Both 1 and 2

b) Neither 1 nor 2

c) 2 only

d) 1 only