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 humankind for over billions of years, and they lived in dominance. either other life forms during this go steady could do nothing against the federal agency of the dinosaurs. However, they did eventually yielding to something. Scientists have theories that one or a few stab stars hit the Earth, but they cannot be sure receivable to the overleap of evidence on the matter. The divisor, atomic number 77, plays a light upon enjoyment as vital evidence in these theories. The main conjecture to the extinction of dinosaurs is called the Alvarez possibility, 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 voluminous meteor colliding with the Earth. The team of scientists, led by Walter Alvarez and his son Luis, went to the Yucatan Peninsula, where proofread of a giant meteor strike is present. When the team arrived, they notice 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. atomic number 77 is one of the rarest elements in the Earths cr ust, and save has two stable isotopes. Ir! idium is often mistaken for platinum, however, Iridium is much more bitter and dense. Due to its extremely uplifted melting point, iridium is real 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, deliverance Iridium with theIf you want to render a full essay, grade it on our website: OrderCustomPaper.com

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