universe & solar system section 4 Practice Questions Answers Test with Solutions & More Shortcuts

Question : 21

The last stage in the life cycle of a star is

a) Red Giant

b) White Dwarf

c) Supernova

d) Black Hole

Question : 22

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 : 23

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 : 24

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 codes given below:
Assertion (A):
The planet Neptune appears blue in colour.
Reason (R):
The presence of Methane gas in the atmosphere of Neptune is responsible for its colour.
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 : 25

Earthquakes are important in landform studies because they can trigger catastrophic events like

1. Landslides and mudflows
2. Glacier surges
3. Tsunamis causing damage and shoreline changes.

a) 1 and 2

b) 1 and 3

c) 3 only

d) 1, 2 and 3