they are made of rock rather that gas or ice
They are small and have rocky surfaces.
its there size and so is for outer planets
All the inner planets are terrestrial planets.
None of the inner planets have rings.
They have no rings.
The inner planets are all terrestrial - they are "rocky". The outer planets are gas giants.
All for of the inner planets are similar in composition. They all have a clearly defined surface, unlike the gas giant planets.
The inner planets Mercury, Venus, Earth, Mars are are all relatively small, they are all rocky, they all have a relatively thin atmosphere.
They are all compact objects with rocky, accessible surfaces.
That they all inner planets
All the inner planets are rocky or terrestrial planets.
All the inner planets are like that
they are all soild masses and mecury, venus, earth, mars
# They are made of rock # They do not posses rings