Geological Changes

there are two types of geological changes taking Earth's movements in mind;
long period changes( very slow; take years or months) 
short period changes(abrupt)

the forces which affect our Earth's crust are ; 
Exogenous forces : which act form outside the Earth's crust. Eg.Cyclones, wind , solar energy etc.
Endogenous forces : whch act from inside the Earth's crust. eg. Earthquakes, volcanoes, movement of tectonic plates etc.