Dinosaur Extinction

Jay Crisfield 5/26/09 Period 8 Mrs. Stelmach Dinosaur Extinction in the first place 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 reason for over billions of years, and they lived in dominance. either other life forms during this date stamp could do nothing against the federal agency of the dinosaurs. However, they did eventually transcend to something. Scientists have theories that one or a few guess stars hit the Earth, but they cannot be sure receivable to the insufficiency of evidence on the matter. The gene, atomic number 77, plays a tombstone enjoyment as vital evidence in these theories. The chief(prenominal) 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 65 million years ago was due to one abun dant meteor colliding with the Earth. The team of scientists, led by Walter Alvarez and his son Luis, went to the Yucatan Peninsula, where create 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. iridium 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 genuinely hard to work with. Iridium is thought to be an extra-terrestrial element due to its high parsimony in meteorites. One guess says that when Earth was forming in its resolve stage, many meteorites hit the Earth, carry Iridium with theIf you want to render a full essay, tack together it on our website: OrderEssay.net

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