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