Q. With respect to terrestrial and jovian planets is/are not correct?
1. Jovian planets were formed in the close vicinity of the parent star where it was too warm for gases to condense to solid particles.
2. The terrestrial planets are smaller and their lower gravity could not hold the escaping gases.
Select the correct answer using the codes given below:

[A] 1 only

[B] 2 only

[C] Both 1 and 2

[D] Neither 1 nor 2

Answer: A
Notes:

Explanation: The difference between terrestrial and jovian planets can be attributed to the following conditions:

  • The terrestrial planets were formed in the close vicinity of the parent star where it was too warm for gases to condense to solid particles. Jovian planets were formed at quite a distant location.
  • The solar wind was most intense nearer the sun; so, it blew off lots of gas and dust from the terrestrial planets. The solar winds were not all that intense to cause similar removal of gases from the Jovian planets.
  • The terrestrial planets are smaller and their lower gravity could not hold the escaping gases.

Source: NCERT Class 11