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

Question : 1

Cycle of sun spots is

a) 11 years

b) 12 years

c) 10 years

d) 9 years

Question : 2

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 : 3

When it is 12 Noon at Allahabad, the time at Wellington (New Zealand) would be close to which one of the following?

a) 6:30 pm of the same day

b) 6:30 pm of the previous day

c) 4:30 pm of the previous day

d) 4:30 pm of the same day

Question : 4

What does the term ‘sial’ refer to ?

a) Ocean bottom rocks

b) A rock which is rich in calcium

c) The core part of the earth

d) Earth’s surface layer

Question : 5

Albedo effect would be relatively higher in

a) noon

b) late evening only

c) early morning only

d) early morning and late evening

Question : 6

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