This state of art review discusses scaling principles for dynamic and earthquake geotechnical centrifuge models that have been known for many years, and shows how the new emphasis on modelling of models using reconstituted soil helps to reduce the difficulties of verification of these principles. It is suggested that models made of reconstituted soil can exhibit a wide range of behavior that is important in the field. In particular it is suggested that liquefaction and cracking are related phenomena which can both be modelled
