Insects, mammals, birds, and flowering plants on land, and fishes, corals, and mollusks in the ocean went on to diversify tremendously soon after the end of the Cretaceous. Cowen, All the presented theories were able to make a justifiable point why dinosaurs went into extinction.
Pages Blanchard, Donald L. This could possibly happen because supernova releases huge quantity of electromagnetic radiation that is in parallel to a nuclear Dinosaur extinction essay. Dinosaurs were a very successful and diverse group, dominating the terrestrial environments of the earth for million years.
If enough radioactive matter was released from the supernova, then plants and animals would have died immediately from radiation sickness. Sun Radiation Caused Extinction. His explanation was that during the lowering of sea level at the end of the Cretaceous, and as these drained off, land bridges such as the Bering Straits were created between formerly isolated continents, allowing large animals to migrate from one continent to another.
The last theory for the extinction of dinosaurs is a major climatic change. It was projected that the same kind of Nuclear Winter brought about by the giant meteor impact was caused by the explosive episodes in and the overspill of lava. The Alvarez Asteroid Impact. The apparently sudden mass extinction of dinosaurs marks the boundary between the Cretaceous and Tertiary periods.
Blanchard Egg Predation by Mammals Another theory that was presented about the extinction of species like the dinosaurs was that during the Cretaceous Period, there might have been an overpopulation of species. This is not to say that all extinction hypotheses are not science; many are excellent examples of good science, but a linkage of direct causation is a problem.
It was specified in one latest theory that a gamma ray beam striking the Earth would break up molecules in the stratosphere, causing the formation of nitrous oxide and other chemicals that would destroy the ozone layer and shroud the planet Dinosaur extinction essay brown smog.
After which the brown smog was said to have caused the ice age as it then triggered the Earth to cool. The next theory for the extinction of dinosaurs is the "Deccan Trap" theory. Ward, a scientist studying this theory, suggested that the normal atmospheric oxygen level is around 21 percent, but evidence indicates that at the time of the Great Dying it dropped to about 16 percent — the equivalent of trying to breathe at the top of a 14,foot mountain.
It is said that this impact may have been the asteroid that caused the extinction of most species at the K-T boundary. The asteroid might also have heated the air and produced acid rain. This means that extinction might be caused by a gradual process or by a sudden catastrophic event that was experienced by the dinosaurs and the species living along with it.
It was said that this might have contributed to the fact that dinosaurs were unable to thrive because they have lost their eggs in the predation cycle.
The Extinction of Dinosaurs Essay Sample Introduction The Cretaceous Period ended in somewhat what paleontologists see as a catastrophic end to large vertebrates living on Earth during that era. It said to happen when the core of a star collapses, where part of the core and outer layers are shot outward creating a huge explosion cloud while some parts of the exploded star creates a black hole as they collapses inward.
The most popular "disaster theory" for the extinction of the dinosaurs is that the Earth was hit by an asteroid or a comet 65 million years ago. When it hit the Earth it would have formed a crater 60 to 90 miles to km wide. Many scientists believe this is good evidence for an asteroid, but the case is not proved.
Col, It was said that the asteroid would have been about 15 km big and that except for the hampered photosynthesis, the impact may have also caused disasters within the land to happen like big fires, volcanic eruptions and tsunamis. The effects of this kind of impact would have killed off many forms of life.
A lot of debris of asteroid collision floats through the solar system which is drawn to the sun and in return is taken by earth. Severe competition may have caused over predation and then the predators had nothing to eat and they died in the process as well.
Even though these are just small organisms, theses are blood sucking organisms that might have cause big predators like the dinosaurs to lower their immunity thus making them vulnerable to sickness and after a while death.
Ausich and Lane The chemical changes in the atmosphere brought about by the asteroid struck was suitable for most of the living things at that time because it was assumed that there were high concentrations of sulfuric acid, nitric acid, and fluoride compounds. Alvarez believed that " A Guide to the Dinosaurs of Colorado.
The asteroid would have exploded deep down in the crater and shot out up to trillion tons of rock and dust. Determining the exact time dinosaurs went extinct is still problematical because of the reasonable resolution of carbon dating.
Cowen, Theories about the extinction Until today, theories are still being developed to give light to what happen to the species that died out and how. This might have contributed to severe competition and rivalry among species like the dinosaurs.Dinosaur Extinction Essay conclusion as to the reason behind the extinction of the Tyrannosaurus Rex.
Although all arguments are credible, and supportive with educated information and data, the most conclusive theory of all is The Alvarez Asteroid Impact theory. Extinction Of Dinosaurs Essay Words | 3 Pages. Extinction of Dinosaurs Two-hundred and thirty million years ago the first dinosaur-like creature roamed the earth.
Within five million years it could be considered a dinosaur. They were soon at the top of the food chain.
They populated every continent. Evaluative Analysis for Dinosaur Extinction Essay. Evaluative Analysis for Dinosaur Extinction In Stephen Jay Gould’s article, “Sex, Drugs, Disasters, and the Extinction of Dinosaurs,” Gould begins to analyze the difference between science and speculation.
Dinosaur Extinction Essay Words | 7 Pages. BIOL Vertebrate Zoology Word count: Dinosaur extinction: An analysis of events and theories that possibly led to the dinosaurs' demise.
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Extinction of Dinosaurs Two-hundred and thirty million years ago the first dinosaur-like creature roamed the earth. Dinosaurs were a very successful and diverse group, dominating the terrestrial environments of the earth for million years.4/4(1).Download