Warm-Up: GeologyVersion en ligne Test your knowledge by correctly ordering the layers of the Earth from the outermost to the innermost layer. par Noel Sayco 1 Order the layers of the Earth from the surface down to the core. Mantle Outer Core Crust Inner Core 2 Order the soil horizons from the topmost layer to the bottommost layer. E Horizon (Eluviation layer) R Horizon (Bedrock) C Horizon (Parent material) B Horizon (Subsoil) O Horizon (Organic layer) A Horizon (Topsoil) 3 Order the elements based on the natural sequence of processes in the rock cycle. (Start with MAGMA) Metamorphic rock formation Sediments formation Magma Heating and Pressure Melting Sedimentary rock formation Igneous rock formation Weathering and erosion