They are all called gas giants, primarily because they are predominantly gas and massive compared to the inner planets. There are several theories why this should be so but there is no definitive answer.
they al are outer planets.
They have in common is that they are the last planets in the solar system
they al are outer planets.
They all have rings
they are all gas giants
All the inner planets are terrestrial planets.
The inner planets are all terrestrial - they are "rocky". The outer planets are gas giants.
its not different at all they are just outer planets
they are all larger than earth
they are not heavy because they are all made up of gases
Outer planets are gas planets and they are outside the astroid belt and are further away from the sun.
They are all gas planets. They are all quite large and made from gas, so there is no real surface like that of earths.