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Extinction of dinosaurs persuasive essay
Hypotheses on the Extinction of Dinosaurs
Hypotheses on the Extinction of Dinosaurs
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It is widely agreed that such an object asteroid 10 kilometers across struck just off the coast of the Yucatan Pennsylvania 66 million years ago. According to scientists who maintain the dinosaur extinction came quickly, the impact must have spelled the cataclysmic end. For months, scientists conclude, dense clouds of dust blocked the sun’s rays darkening, and chilling Earth to deadly levels for most plants and, in turn, many animals. Then when the dust finally settled, gases created by the impact caused temperatures to rise above pre-impact levels. In a few years to this hypothesis these frigate and sweltry climatic extremes caused the extinction of not just the dinosaurs, but up to 70 percent of all plants and animals living at the time.
However, asteroids are much more deadly. If over-sized meteor can wreck buildings and injure people, then a normal sized asteroid can easily wipe out species if it lands in the right place. As mentioned before, asteroids are much bigger than meteor and much more rare. According to the “Mail Online” 12,000 years ago some type of asteroid slammed into the Northern Canada and some scientist believe that wiped off the mammoths and caused the “Younger Dryas”. Another famous event of asteroids striking, that many scientist believe, was around 65 million years ago asteroids rained and killed of all the dinosaurs 75% of all the life on earth.
The possibility if a meteor strike as the cause of extinctions is discarded, something that most specialists agree on. There is no evidence of any meteor crater big enough or recent enough to be accountable for it; there are no “elements that are common extraterrestrially but less so on Earth, such as iridium, and no sign of a tsunami or other phenomena following the impact.” The extinctions where also very selective and occurred over a very long period of time. If a “one shot” catastrophe had been the cause it would have affected all species at the same time and in similar
The question of what caused the extinction of megafauna during the Late Pleistocene period is one that archaeologists have struggled to answer for decades, but why should it matter? Discovering with certainty the cause of megafaunal extinction would simultaneously prove or disprove any of the proposed implications of each existing theory regarding this massive extinction.
25 kilometer meteor that may have killed off the dinosaurs almost 65 million years ago (Cretaceous).
Armageddon begins by showing the destruction of the Earth by an asteroid 65 million years ago, when the dinosaurs inhabited the earth. According to the narration, the asteroid is said to have been six miles wide, with the power of 10,000 nuclear weapons. The after effects were trillions of tons of dirt and rock thrown into the atmosphere, creating a blanket of dust that the sun was unable to penetrate for 1,000 years. The narrator explained that it happened once, and that it would happen again, it was only a matter of when.
The disaster theory, Gould claims, is an example of good science. It has testable evidence and has an impact on studies in other fields of science, it develops further and explains why the extinction of dinosaurs occurred simultaneously with other events. This theory suggests that a large comet hit the Earth sixty five million years ago, causing the cloud of dust to rise into the sky and to block sunlight. As a result, world temperatures went down significantly, the ice age bega...
How did dinosaurs go extinct you might ask.There are many thoughts about this and theories. This Document will tell you some of the major ones people know and believe.
Many of these causes could be prevented fairly easily. If people today would just follow some simple rules, none of these would be as big as they are now.
The earth has experienced five mass extinctions, which is an extinction where a considerable amount of the world’s population was wiped out. Some people believe that humans are going to be the cause of the next mass extinction. Because of unclear counting methods, and unrecorded species humans are being put in the spotlight for the main cause of extinctions. However, the Anthropocene, a period dominated by humans, could be a benefit to biological diversity by using hybridization, re-wilding species, and pushing more towards an aggressive conservation to relocate species and fill the gap in extinction rates.
of species due to a variety of causes. Included is out competition, depletion of resources
The asteroid was approximately 6 miles across and it caused a lot of changes that affected the dinosaurs. Some of these were temperature changes, acid rain, air borne debris, regional wildfires, and months or even years of darkness. The resulting plume of the debris from the asteroid impact could have caused the sun to become temporarily blocked. Therefore, this could have caused the plants to die, causing the herbivores that ate them to die, resulting in the carnivores also dying. (J. David Archibald, 1034)
Biodiversity loss can lead to extinction, and hurt human life. It is our responsibility to take care of the environment. We bring in machines that harm the environment and destroy animal life. We need to limit ourselves on how much land and resources we consume. There are major issues that are causing species to become extinct and hurt our way of life and other animals do to the change in food chain.
Nowadays it is common to read articles in newspapers and magazines regarding biodiversity issues. Human beings have been knowingly and unknowingly destroying biodiversity since their existence. Biodiversity is the measure of the variety of species of animals living in an area. Forests are usually areas with high biodiversity while deserts are the opposite. Human beings have always destroyed biodiversity either by deforestation, or by some other means. Biodiversity depletion is a natural phenomenon. But the present levels of biodiversity depletion are many times higher than the natural rate. Recently the levels of loss in biodiversity have started causing global concern. Some of the main causes for loss in biodiversity are alteration of habitats, increasing levels of pollution and human population growth.
The planet earth is a complex environment in which various organisms have cycled through their time of existence for millions of years. All species that have lived are destined for extinction at some point in time, and this is a natural process and cycle. Mass extinctions are this process at an extreme rate. In fact, many scientists today suspect that earth is on the verge of the sixth mass extinction. In order to better analyze this, one must understand what a mass extinction is, the history of mass extinctions, the evidence that earth is nearing the next extinction, and how humans are affecting the extinction.
The Destruction of the Rainforest The purpose of this paper is to inform the reader of the destruction of the rainforest. In my paper, I discuss many aspects of the rainforest. I explain what the rainforests are, and give a brief summary of the importance of the rainforests. I also give a description of the destruction of the rainforest, and how a person can help save the rainforest.