Question

100 points

Part 1: What are the two groups of planets based on composition?


Part 2: Describe the composition of each group

Answer 1

the two groups of planets based on composition;

1.Terrestrial planets.Mercury ,Venus ,Earth and Mars are terrestrial planets.It is also called inner planets.

• a terrestrial planet is a celestial body that is

composed primarily of silicate rocks or metals.

• It has a solid surface.
• They are primarily composed of gases like hydrogen and helium, water, and some heavier elements .

2.Jovian planets.Jupiter, Saturn, Uranus and Neptune collectively are known as the jovian planets. It is also called outer planets.

• planets.Jupiter, Saturn, Uranus and Neptune collectively are known as the jovian planets. It is also called outer planets.they have relatively small, dense cores surrounded by massive layers of gas.
• it is made almost entirely of hydrogen and helium, .
• these planets do not have solid surfaces.