The Terrestrial group includes rocky worlds that tend to range in mass between 0.02 and 5.0 times that of the Earth. They are massive enough to have geological activity, a magnetic field and an atmosphere.
These are Terrestrial worlds which are still in the process of forming.
These are Terrestrial worlds tidally locked to their primary star.
Such worlds do not support a continuous hydrological cycle. They tend to have thick atmospheres due to geological outgassing, and may undergo constant resurfacing due to either continuous or cataclysmic events.
These are dry Terrestrial worlds that support a limited hydrological cycle which may include an accompanying ecology.
Such worlds support a continuous hydrological cycle and often an accompanying biosphere. The surface crust is split into continental and oceanic crusts, and they have an active geologic cycle with a magnetic field.
Carbon rich worlds, deprived of water, silicates and other oxygen-bearing compounds. They are cold worlds, which have an Ammonia based hydrological cycle. Life tends to evolve in liquid ammonia rather than in water. Any water there is consists of hard ice, taking the place of rock.
Rich in methane and carbon compounds.
These are terrestrial worlds with a global ocean tens of kilometres deep.
There are geologically active worlds covered in global oceans of liquid Ammonia.
There are geologically active worlds covered in global oceans of liquid Methane.