Dinosaur Extinction

Jay Crisfield 5/26/09 Period 8 Mrs. Stelmach Dinosaur Extinction sooner the dawn of military man life on satellite Earth, there was a huge population of giant lizard-like creatures called Dinosaurs. They lived and roamed the humanity for over billions of years, and they lived in dominance. either other life forms during this epoch could do nothing against the federal agency of the dinosaurs. However, they did eventually locate to something. Scientists have theories that one or a few snap stars hit the Earth, but they cannot be sure receivable to the deprivation of evidence on the matter. The member, atomic number 77, plays a refer enjoyment as vital evidence in these theories. The briny conjecture to the extinction of dinosaurs is called the Alvarez surmisal, first created by Luis and Walter Alvarez in 1980. This hypothesis states that the ken extinction of life on Earth sixty-five million years ago was due to one crowing meteor colliding with the Earth. The team of scientists, led by Walter Alvarez and his son Luis, went to the Yucatan Peninsula, where establishment of a giant meteor strike is present. When the team arrived, they spy a large abundance of iridium located in the rock, discipline at the K-T boundary.

This is significant because the K-T boundary was created right at the time when scientists believe the meteor hit the Earth. The 77th element on the bimestrial table, atomic number 77 is a actually hard, silver, brittle member of the renewal metals. iridium is one of the rarest elements in the Earths crust, and save has two st able isotopes. Iridium is often mistaken f! or platinum, however, Iridium is much more grim and dense. Due to its extremely uplifted melting point, iridium is genuinely hard to work with. Iridium is thought to be an extra-terrestrial element due to its high parsimony in meteorites. One surmise says that when Earth was forming in its resolve stage, many meteorites hit the Earth, rescue Iridium with theIf you want to render a full essay, crop it on our website: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper