universe & solar system section 4 MCQ Questions & Answers Detailed Explanation

Question : 1

The last stage in the life cycle of a star is

a) Red Giant

b) White Dwarf

c) Supernova

d) Black Hole

Question : 2

How much is the mass of the moon when compared with that of the earth ?

a) 1/51

b) 1/8

c) 1/81

d) 1/49

Question : 3

Which of the following statement(s) is/are true?

1. A planet is a celestial body that orbits a star and may or may not be a star itself
2. A planet has sufficient mass for self gravity and is roughly spherical in shape
3. A planet is formed out of fragments of rocks and metal leftovers is our solar system
4. Pluto is the smaller planet of our solar system

a) 2 and 4

b) 2, 3 and 4

c) 2 only

d) 1 and 2

Question : 4

Consider the following statements:

1. Our solar system is located in the orion arm of the Milky way galaxy, about two-third of the way out from the centre.
2. The solar system formed from an interstellar cloud of dust and gas or nebulla about 4.6 billion years ago.

a) Both 1 and 2

b) Neither 1 nor 2

c) 2 only

d) 1 only

Question : 5

What is the time taken by the Earth to complete one rotation on its axis?

a) 24 hr

b) 24 hr 12 min 6 sec

c) 23 hr 56 min 4 sec

d) 23 hr 52 min 4 sec

Question : 6

Which one of the following is the reason due to which the wind in the southern hemisphere is deflected towards its left?

a) Inclined axis of the Earth

b) Rotation of the Earth

c) Temperature and pressure variations

d) Difference in the water masses of northern and southern hemisphere