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