The Rock cycle

Weathering - breaking down rocks into smaller bits by Onion skin weathering or freeze-thaw weathering Erosion - Wearing down of rocks Transportation - moving eroded bits of rock round the world by water and wind Deposition - laying down of sediment Burial/compression/cementation- squeezing and compressing layers - forming sedimentary rocks Heat/pressure - further squashing and heating - turns into metamorphic rocks Melting - intense heating makes rock partially melt - changes into magma cooling - solidification of the molten rock - forms igneous rock Exposure - back to weathering and erosion

Onion skin weathering - When the sun warms the surface of the rock and at night it cools down. Causes surface to expand and contract, it eventually breaks away Freeze thaw weathering - water freezes, and expands. after freezing and thawing many times bits break off