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In short, the rock cycle is the name for the processes that forms and recycles the different types or rocks on our planet. Rocks begin the cycle as igneous rocks, erode into sedimentary rocks then change into metamorphic rocks, finally the rocks melt back to magma and start the process again.
How does weathering, erosion and deposition contribute to the rock cycle? these 3 are few of many processes which helps in rock formation to understand these processes and their contribution to rock cycle we have to study the whole cycle. I will explain in brief summary here: first start with . magma erupts (Extrusive igneous rocks) or solidifies in sub-surface of earth (Intrusive igneous rock). when they are exposed and erosion occurs which is slow breakdown of rock through wind, water or other processes. The weathered pieces (sediments) move to other places by wind or water and get deposited someplace else.