Abundance of the chemical elements of the volatile elements hydrogen, helium, neon, and nitrogen, as well as carbon which has been lost as volatile hydrocarbons. The remaining elemental composition is roughly typical of the "rocky" inner planets, which formed in the thermal zone where solar heat drove volatile compounds into space. The Earth retains oxygen as the second-largest component of its mass (and largest atomic-fraction), mainly from this element being retained in silicate minerals which have a very high melting point and low vapor pressure. The mass-abundance of the nine most abundant elements in the Earth's crust is approximately: oxygen 46%, silicon 28%, aluminum 8.2%,
The Sky Has Fallen the gnarliest films I have seen in recent history," adding that it was "on par with Raimi’s "The Evil Dead"." Mark Miller of "Ain't It Cool News" wrote that it was "genuinely creepy and downright scary." Brian Kirst of "Horror Society" said it was "a visual marvel" that "creates both a sympathetic point of view and a world of oozing horror as well." Bella Blitz of "The Horror Honeys" pointed out that the film has "elements of revenge, monsters, slasher, and splatter genres combined." The Sky Has Fallen The Sky Has Fallen is a 2009 American horror film written and