This document discusses various processes of coastal erosion including hydraulic action, abrasion, attrition, and corrosion. Hydraulic action involves the force of water hitting cliffs while abrasion involves rocks being thrown rapidly. Less resistant rock types like clay and limestone erode more quickly through these processes, forming bays and beaches. The geology of the coast affects the rate of erosion. Coastlines are dynamic landforms that change through erosion and deposition from waves. Homework is assigned to find an example of a coast experiencing erosion and its effects on people.