Dinosaur Extinction

Jay Crisfield 5/26/09 Period 8 Mrs. Stelmach Dinosaur Extinction in the lead the dawn of military man life on planet Earth, there was a huge population of giant lizard-like creatures called Dinosaurs. They lived and roamed the man for over billions of years, and they lived in dominance. either other life forms during this visit could do nothing against the federal agency of the dinosaurs. However, they did eventually come down to something. Scientists have theories that one or a few blastoff stars hit the Earth, but they cannot be sure receivable to the lose of evidence on the matter. The component part, atomic number 77, plays a cardinal enjoyment as vital evidence in these theories. The of import conjecture to the extinction of dinosaurs is called the Alvarez assumption, first created by Luis and Walter Alvarez in 1980. This hypothesis states that the ken extinction of life on Earth 65 million years ago was due to one full-size meteor colli ding with the Earth. The team of scientists, led by Walter Alvarez and his son Luis, went to the Yucatan Peninsula, where certainty 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 rattling hard, silver, brittle member of the renewal metals. atomic number 77 is one of the rarest elements in the Earths crust, and save has two stable isotopes. Iridium is ! often mistaken for platinum, however, Iridium is much more caustic and dense. Due to its extremely uplifted melting point, iridium is actually 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, obstetrical delivery Iridium with theIf you want to render a full essay, regularise it on our website: OrderCustomPaper.com

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