Consider the following statements in case of terrestrial planets:

I. Mercury, Venus, Earth and Mars are terrestrial planets having low densities as compared to other planets.

II. They lie between the Sun and the belt of asteroids.

III. Their lower gravity can hold the escaping gases.A.I and IIB.II and IIIC.I and IIID.II only

Question

Consider the following statements in case of terrestrial planets: I. Mercury, Venus, Earth and Mars are terrestrial planets having low densities as compared to other planets. II. They lie between the Sun and the belt of asteroids. III. Their lower gravity can hold the escaping gases.

Accepted Answer

II only. Statement I is wrong. Terrestrial planets are actually denser, not less dense, than other planets. Mercury, Venus, Earth, and Mars are all rocky, so they pack more mass into their volume than gas giants do. Statement II is correct. All four terrestrial planets orbit between the Sun and the main asteroid belt. This asteroid belt marks the rough dividing line between the small rocky planets and the giant gas planets beyond. Statement III is wrong. Lower gravity actually makes it harder, not easier, to hold onto light escaping gases. That is exactly why terrestrial planets lack the thick hydrogen and helium atmospheres seen on gas giants. So only statement II genuinely holds true, making option (d) the answer.

Consider the following statements in case of terrestrial planets: I. Mercury, Venus, Earth and Mars are terrestrial planets having low densities as compared to other planets. II. They lie between the Sun and the belt of asteroids. III. Their lower gravity can hold the escaping gases.

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