The inner planets are composed of rock and metal, and the outer planets are rich in low-density gases such as hydrogen and helium.

Question

Quizplus · Accepted Answer

The inner planets (Mercury, Venus, Earth, and Mars) are terrestrial, composed primarily of rock and metal, while the outer planets (Jupiter, Saturn, Uranus, and Neptune) are gas giants and ice giants, rich in gases like hydrogen and helium.

The Inner Planets Are Composed of Rock and Metal, and the Outer