Definition : (Geo, G. the Earth; Morph, G. Form, ology G. the science of) Geomorphology is the study of landscapes--It entails the systematic description of landforms and the analysis of the processes that create them.
Nuclear binding energy is the energy that would be required to disassemble the nucleus of an atom into its component parts. These component parts are neutrons and protons, which are collectively called nucleons.
This represents a lower limit for the gravitational binding energy of a planet, because the density of a planet is not constant; it is always highest in the centre. Therefore, the ratio of mass to volume will increase as the outer layers are peeled away rather than staying constant.