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4th Grade > Science

OUR UNIVERSE MCQs

Total Questions : 36 | Page 4 of 4 pages
Question 31.


If a new planet is discovered between Earth and Mars, then the time taken by that planet to revolve around the Sun would be:


  1.      less than that of Earth 
  2.      more than that of Earth
  3.     less than that of Mars
  4.     more than that of Mars
 Discuss Question
Answer: Option B. ->  more than that of Earth
:
B and C
The time taken by the new planet to complete one revolution around the Sun will be more than that of Earth but less than that of Mars.
It is because the new planet has to travel more distance than Earth but less distance than Mars. 
Question 32.


Identify Mars among the following planets?


  1.    
  2.    
  3.    
  4.    
 Discuss Question
Answer: Option B. ->
:
B

Mars is the fourth planet from the Sun and the second smallest planet in the Solar system.
It has a reddish appearance due to which it is known as the "Red Planet".


Question 33.


Which of the following statement(s) is/are correct in regard to planet Venus?


  1.     It is the second planet from the Sun.
  2.     It is the hottest planet in the solar system.
  3.     Life is possible on planet Venus.
  4.     It is the brightest planet in the solar system.
 Discuss Question
Answer: Option B. -> It is the hottest planet in the solar system.
:
A, B, and D
- Venus is the second planet from the Sun.
- It is the hottest and brightest planet in the solar system.
- It is a very dry planet with no evidence of water, oxygen and high surface temperature. These are some of the reasons due to which life is impossible on this planet.
Question 34.


Which of the following planet(s) is/are known as the Ice giant(s)?


  1.     Neptune
  2.     Jupiter
  3.     Saturn
  4.     Uranus
 Discuss Question
Answer: Option A. -> Neptune
:
A and D
- Uranus and Neptune are composed mainly from ice. Moreover, they are too huge in size that multiple Earths could fit into them.
- Due to these reasons both these planets are known as Ice Giants.
Question 35.


Which of the following is the correct order of planets in size from smallest to largest?


  1.     Mercury < Jupiter < Earth < Saturn
  2.     Jupiter < Mercury  < Earth < Saturn
  3.     Jupiter < Saturn < Earth< Mercury
  4.     Mercury < Earth < Saturn < Jupiter
 Discuss Question
Answer: Option D. -> Mercury < Earth < Saturn < Jupiter
:
D
- Jupiter is the largest planet of the solar system.
- Saturn is the second largest planet of the solar system.
- Mercury is the smallest planet of the solar system.
So, the correct order of planets in size from smallest to largest will be: Mercury < Earth < Saturn < Jupiter
Question 36.


"The Great Red Spot" is a huge storm in the atmosphere of ___.


  1.     Uranus
  2.     Neptune
  3.     Jupiter
  4.     Earth
 Discuss Question
Answer: Option C. -> Jupiter
:
C


- The great red spot on jupiter is a storm that is as big as 3 earths and has been active for 200 years.
- The reason for this ferocious storm is the high speed of rotation of jupiter.


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