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