universe & solar system section 5 MCQ Questions & Answers Detailed Explanation

Question : 1

Consider the following two statements, one labelled as the Assertion (A) and other as Reason (R). Examine these two statements carefully and select the correct answer by using the code given below:
Assertion (A):
Comets revolve round the sun only in long elliptical orbit.
Reason (R):
A comet develops a tail when it gets close to the sun. Codes:

a) A is true, but R is false.

b) A is false, but R is true.

c) Both A and R are true, but R is not the correct explanation of A.

d) Both A and R are true and R is the correct explanation of A.

Question : 2

The Blue Moon phenomenon occurs

a) when four full moons appear in two consecutive months of the same calendar year.

b) None of the above

c) when two full moons appear in the same month thrice in a calendar year.

d) when two full moons occur in the same month.

Question : 3

Day and Night are equal at the:

a) Poles

b) Eqator

c) Antarctic

d) Prime Meridian

Question : 4

Planet Saturn

a) Warmer than Neptune

b) Warmer than Jupiter

c) is colder than Neptune

d) is colder than Jupiter

Question : 5

The twinkling of a star is due to

a) the transit of other celestial objects across the line of sight.

b) the atmospheric refraction of starlight.

c) the variation in the composition of the star with time.

d) the variation in the intensity of light emitted by it with time.

Question : 6

The Equatorial region has no other season except summer. What could be the reason ?

1. The length of day and night is more or less equal over the year
2. The Earth’s rotational velocity is maximum at the Equator
3. The coriolis force is zero at the Equator

a) 2 and 3 only

b) 1, 2 and 3

c) 1 and 2 only

d) 1 only