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
A Journey to the Centre of the Earth (1984 video game) finding the controls difficult but nevertheless concluding, "I recommend this game to anyone who wants a few hours of fun". "Commodore Horizons" gave it 5/8 for graphics, 5/8 for sonics, and 6/8 for gameplay, calling it an "agreeable arcade adventure . . . Unremarkable graphically; but good fun to play" A Journey to the Centre of the Earth (1984 video game) A Journey to the Centre of the Earth is a side-scrolling action-adventure platform game released for the Commodore 64 in 1984, and re-released by CRL in 1985 under the title Journey. The game has no real narrative. The introduction