universe & solar system section 11 MCQ Questions & Answers Detailed Explanation

Question : 1

The solar eclipse achieves totality only in limited geographical regions because

a) The trajectories of the earth around the sun and the moon around the earth are not perfect circles

b) Sun rays can reach most of the peripheral regions of shadow of the moon due to atmospheric refraction

c) The earth is not smooth flat surface, but has elevations and depressions

d) The size of the shadow of the moon on the earth is small as compared to the cross section of the earth

Question : 2

Why do we have a leap year every four years?

a) The length of a year is not an integer number of days

b) It is a convention

c) The revolution slows down a little once every four years

d) The Earth gets shifted out of orbit every four year

Question : 3

Which planet in our solar system is nearly as big as the earth ?

a) Venus

b) Pluto

c) Mars

d) Mercury

Question : 4

If the stars are seen to rise perpendicular to the horizon by an observer, he is located on the

a) South Pole

b) North Pole

c) Tropic of Cancer

d) Equator

Question : 5

The distance of Moon from the Earth is

a) 350 thousand kms.

b) 446 thousand kms.

c) 300 thousand kms.

d) 384 thousand kms.

Question : 6

If a star is bigger than Sun, but not more than twice as big, it will turn into a _______.

a) Avenger

b) Discover

c) Maxima

d) Pulsar