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
Centre of the Earth Centre of the Earth The Centre of the Earth is a purpose-built environmental education centre in Birmingham, England, run by the Wildlife Trust for Birmingham and the Black Country. It is 1.5 km away from Birmingham City Centre and was opened in 1993, and is claimed to be the first such purpose built centre in an urban setting in Europe. The Centre is set in landscaped grounds (originally a council yard), providing a resource for learning and play. The Soho Loop of the BCN Main Line Canal is adjacent, and the Centre has its own wharf, which has been recently