Answer: Sediments accumulate and combine
Sedimentary rocks weathers and erode
Sediments compact and cement together
When the weathering and erosion of the rocks occurs sediments are formed. These sediments accumulate and combine in different stratified layers to form the sedimentary rocks under pressure. These sediments gets cemented and the particles compact to obtain a solid physical appearance of the rock. These sedimentary rocks when exposed to weathering agents like wind, air and chemicals gets weathered and eroded again into sediments.