Major objective of this lecture is to present on Erosion and Weathering. Here also explain types of Erosion: Water; Wind; Glacier; Soil and Sea. Erosion is (geology) the mechanical process of wearing or grinding something down (as by particles washing over it). Weathering is the process where rocks are worn away or broken down into smaller pieces by wind ,water or plants etc.Erosion happens when these broken rocks and sediments are picked up & moved to another place by ice, water or wind.