universe & solar system section 3 MCQ Questions & Answers Detailed Explanation

Question : 1

Consider the following statements.

1. The albedo of an object determines its visual brightness when viewed with reflected light.
2. The albedo of Mercury is much greater than the albedo of the Earth.

a) Both 1 and 2

b) Neither 1 nor 2

c) Only 2

d) Only 1

Question : 2

Consider the following two statements, one labelled as the Assertion (A) and the other as Reason (R). Examine these two statements carefully and select the correct answer by using the codes given below:
Assertion (A):
To orbit around Sun, the planet Mars takes lesser time than time taken by the Earth.
Reason (R):
The diameter of the planet Mars is less than that of the Earth. 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 : 3

The shortest route between two places is along the

a) rivers

b) direction of winds

c) longitudes

d) latitudes

Question : 4

Assertion (A):
Artificial satellites are always launched from the Earth in the Eastward direction.
Reason (R):
The Earth rotates from West to East and so the satellite attains the escape velocity.
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 : 5

How many constellations are in our Space?

a) 89

b) 90

c) 88

d) 87

Question : 6

Which one of the following statements is/ are correct with regard to Milky Way?

1. It is a spiral galaxy.
2. The solar system resides in one of its spiral arms.

a) Both 1 and 2

b) Neither 1 nor 2

c) 2 only

d) 1 only