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. Crust Outer Core Inner Core Mantle 2 Order the soil horizons from the topmost layer to the bottommost layer. R Horizon (Bedrock) E Horizon (Eluviation layer) B Horizon (Subsoil) C Horizon (Parent material) 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) Metamorphic rock formation Sedimentary rock formation Magma Weathering and erosion Igneous rock formation Sediments formation Heating and Pressure Melting