Abundance of the chemical elements in the Sun and outer planets is similar to that in the universe. Due to solar heating, the elements of Earth and the inner rocky planets of the Solar System have undergone an additional depletion of volatile hydrogen, helium, neon, nitrogen, and carbon (which volatilizes as methane). The crust, mantle, and core of the Earth show evidence of chemical segregation plus some sequestration by density. Lighter silicates of aluminum are found in the crust, with more magnesium silicate in the mantle, while metallic iron and nickel compose the core. The abundance of elements in specialized environments, such as atmospheres, or
Journey to the Centre of the Earth (album) he was unavailable, so Wakeman picked actor David Hemmings. The 40-minute piece is in four distinct sections: "The Journey", "Recollection", "The Battle", and "The Forest". Wakeman wrote all the lyrics and narration. Wakeman was not confident with his lyric writing, and admitted that his first set of lyrics were "really bad" which prompted a rewrite. His band nicknamed him "Longfellow". "The Forest" includes an excerpt of "In the Hall of the Mountain King" by Edvard Grieg. German Professor Lidenbrook discovers an old parchment that detailed a journey to the centre of Earth undertaken by Arne Saknussemm, an Icelandic alchemist. The