universe & solar system section 3 Practice Questions Answers Test with Solutions & More Shortcuts

Question : 26

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 : 27

Which one of the following is the dominant element of the earth crust?

a) Oxygen

b) Silicon

c) Iron

d) Aluminium

Question : 28 [NDA 2008-II]

Which one of the following is correct?

a) Star

b) Constellation

c) Planet

d) Great bear is a Galaxy

Question : 29

Which of the following statements about Venus is/are true

1. Venus is the brightest object in the sky after the sun and the moon.
2. The atmosphere of Venus is mostly CO2 making it the hottest planet of our solar system.
3. It has a strongmagnetic field and very dense atmosphere.
4. It spins in clock-wise direction.

a) 2, 3 and 4

b) 1, 2 and 4

c) 1, 3 and 4

d) 1 and 2

Question : 30

The powerful experiment that took place recently to study the earth’s conditions just after the big bang is known as:

a) Microwave anisotropy probe

b) None of these

c) Steady state experiment

d) Large Hadron Collider