universe & solar system section 1 MCQ Questions & Answers Detailed Explanation

Question : 1

What is the unit of measurement of distance between celestial bodies ?

a) Light year

b) Kilometre

c) Statute mile

d) Nautical mile

Question : 2

If the time of a place located on 165° E meridian is 11:00 pm on Sunday, what would be the time at the place located on 165° W meridian?

a) 1:00 am on Sunday

b) 11:00 pm on Saturday

c) 12:00 noon on Sunday

d) 11:00 pm on Sunday

Question : 3

Stars twinkle but planets do not twinkle because

a) they are very far away from the earth resulting in decrease in intensity of light

b) they are nearer to the earth and hence we receive a greater amount of light and therefore minor variations in intensity are not noticeable

c) their distance from the earth does not change with time

d) they emit light of a constant intensity

Question : 4

Time taken by light emitted from Sun to reach Earth is

a) 8 minutes

b) 16 minutes

c) 1 minute

d) 2 minutes

Question : 5

Assertion (A):
To orbit around the Sun the planet Mars takes lesser time than the time taken by the Earth.
Reason (R):
The diameter of the planet Mars is less than that of Earth.
Code

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 : 6

Which one of the following statements is not correct?

a) All meridians are always parallel to one another

b) An indefinite number of meridians may be drawn on a globe

c) Meridians are spaced farthest apart at the equator and converge to common points at the poles

d) All meridians run in a ture North-South direction