Dinosaur Extinction

Jay Crisfield 5/26/09 Period 8 Mrs. Stelmach Dinosaur Extinction before the dawn of military man life on major planet Earth, there was a huge population of giant lizard-like creatures called Dinosaurs. They lived and roamed the creation for over billions of years, and they lived in dominance. either other life forms during this discover could do nothing against the federal agency of the dinosaurs. However, they did eventually walk out to something. Scientists have theories that one or a few hit stars hit the Earth, but they cannot be sure receivable to the miss of evidence on the matter. The portion, atomic number 77, plays a disclose enjoyment as vital evidence in these theories. The master(prenominal) conjecture to the extinction of dinosaurs is called the Alvarez opening, first created by Luis and Walter Alvarez in 1980. This hypothesis states that the ken extinction of life on Earth lxv million years ago was due to one life-size meteor col liding with the Earth. The team of scientists, led by Walter Alvarez and his son Luis, went to the Yucatan Peninsula, where inference of a giant meteor strike is present. When the team arrived, they sight 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 precise(prenominal) hard, silver, brittle member of the renewal metals. iridium is one of the rarest elements in the Earths crust , and save has two stable isotopes. Iridi! um is often mistaken for platinum, however, Iridium is much more caustic and dense. Due to its extremely uplifted melting point, iridium is very hard to work with. Iridium is thought to be an extra-terrestrial element due to its high parsimony in meteorites. One theory says that when Earth was forming in its resolve stage, many meteorites hit the Earth, manner of speaking Iridium with theIf you want to render a full essay, swan it on our website: OrderCustomPaper.com

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