This document summarizes the processes of modeling land relief through meteorization, erosion, transport, and sedimentation by various geological agents. It describes 3 parts of the Earth's structure and the rock and sedimentary cycles. Various geological agents like wind, glaciers, streams, rivers, groundwater and sea are described in terms of their meteorization, erosion, transport and sedimentation processes to form landscapes. Specific landforms produced by fluvial and aeolian (wind) processes are also outlined, including badlands, fairy chimneys, dunes, loess deposits, meanders, deltas, estuaries and terraces.