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. Outer Core Inner Core Crust Mantle 2 Order the soil horizons from the topmost layer to the bottommost layer. C Horizon (Parent material) E Horizon (Eluviation layer) B Horizon (Subsoil) R Horizon (Bedrock) A Horizon (Topsoil) O Horizon (Organic layer) 3 Order the elements based on the natural sequence of processes in the rock cycle. (Start with MAGMA) Sedimentary rock formation Sediments formation Weathering and erosion Metamorphic rock formation Melting Igneous rock formation Magma Heating and Pressure