Evidence about the asteroid theory

bear witness ab bug out the star-shaped speculation inst each(prenominal)ationThe purpose of the case study is to investig meet Did a meteorite make the dinosaurs extinct.These theories are not exactly been justified. It is an unsolved mystery nobody knows the reason and what caused the dinosaurs to manufacture extinct.A meteorite is a body of matter that reaches the earths surface because it has not been heated up by friction with the automated teller machine. It is made up of iron, stone or a mixture of both. Most meteorites are made as deuce angulates are collided with each other or fragments of asteroids and comets. asteroids are medium size rocks that orbit the sunlight Asteroids can be sm altogetherer than one-mile to al well-nigh 600 miles. on that point are m some(prenominal) asteroids in our solar system. The asteroid belt was created when the solar system was formed and the asteroid belt is made from a overcloud of dust, ice and gas. The land orbits the sun. T he earth meets objects in space like dust or bits of rock broken rack up from asteroids. By the end of the cretaceous period 50% of both living things on Earth and in sea were wiped out. Dinosaurs had been living on the earth about 230 cardinal pine time ago and they became extinct closely 65million yearsago.Their liquidation hasconfused scientistsforyears. It affected plant and animals on region and in water. Somescientistsbelievethatdinosaursdiedinallatonce,inamass extinction. A bangingasteroidorcometcrashedintoEarthandchangedtheclimate. Anincreaseinvolcanicactivitycausedashand dust whichblockedthesun. Diseaseswipedoutentirepopulationsofdinosaurs. Asevereiceagecould peechangedtemperaturesandfrozenalotofEarthswater. The derive of earths oxygen could have dropped which caused suffocation to the dinosaurs. Mammals came that ate dinosaur eggs. An exploding start supernova could have killed the dinosaurs.Any of these theories could have been responsible for the extinction of din osaurs none of these theories have been proven. The hypothesis which has the most turn out and has been approved by most of the geologists and scientist is the Asteroid theory.Scientific TheoriesThere are two sheaths of extinction theories dawdling extinction and catastrophic extinction. Gradual extinction would have been like the changes in the earths climate. It could also have been because new animals achieved in the struggle and coped with all the laboriousies modeling mammals, etc. possibility explained that mammals ate dinosaurs eggs. Catastrophic extinction would have caused the dying of the dinosaurs suddenly, such as an asteroid hitting the earth, or the eruption of volcanoes make sudden death.There were many theories to show how the dinosaurs were wiped out. The theories are not been say yet. The most accepted theory is the Asteroid Theory. The offshoot people who bring this theory were Luis and Walter Alvarez in 1980. This theory explains that an asteroid hit o r collided with the Earth nearly 65 million years ago and this collision would have given off so much dust into the environment that the sun rays would not be able-bodied to enter or shine and plants and animals would die. The rubble in the atmosphere would have obstructed the sun for a desire time causing changes in temperature the temperature would get caller and caused severe recess to photosynthesis. Dinosaurs could not adapt to the changes in climate the occurred from this huge collision and and so they were not able to survive. Because plants energy comes from the sun, they would probably be affected first by the changes in climate. Even though having this much support to the evidence a few geologists did not believe in the Asteroid Theory and asked to show the volcanic crater where the meteorite must have fallen but the crater had buried in sediment.The elements were left behind in lots of amounts in the K-T layer where the collision happened. The impact would have als o created forest fires and long term environmental changes. The speed of the asteroid would have been 100,000 kilometres per hour approximately. some other theory that shows how the dinosaurs were wiped off is volcanic theory. The consequences of volcanic activity could have caused so much ash and gasses added to the atmosphere which whence blocked sunlight and creating difficult conditions for dinosaurs. The level of volcanic activity would also have given off greenhouse gasses which increased the Earths temperature.It has also been suggested that a disease killed off the dinosaurs. A very dangerous disease may have spread among all the dinosaurs causing them to become extinct. A disease might have wiped out all the dinosaurs if they had no cure, but the disease wouldnt kill off all the plants all around the earth.Another theory is that the dinosaurs died during an ice age. During this time periods, temperatures drop, cooler temperatures may have killed all the plants and dinosau rs. Scientists have not found any evidence of an ice age that could have happened during the life of the dinosaurs.A supernova explodes with jackpot energy and can keep our sun burning for billions of years. A supernova is a star that gives off large volumes of energy. The chance of a supernova to occur is nearly one in a million. The increased amount of radiation from a supernova could have affected the Earths ozone layer.Effects on Marine LifeThe amount of oxygen in the seas would have decreased. Many sea creatures would have died because of the wreck of the food chain. There could have been an increase of acid rain. The Asteroid effected species both on sea and land.Deflecting a meteoriteTo collision can sole(prenominal) be avoided if we move the meteorite away or if the meteorite can split into low-spirited pieces so that they can burn up in the atmosphere by friction. The often move around very fast which makes it difficult to stoop it. If the meteorite is broken you woul d expect to get many small rocks intead of a large meteorite, but some of the small rocks may brun up in the atmosphere which is better than having a larger meteorite hitting the earth and causing problemsA graph to explain the extinction, climate and the amount of atomic number 77The climate is popular at the start of the Cretaceous period but during the end it in the end decreases and shows the evidence that climate change might have also caused the extinction. caller temperatures may have caused problems like the sunlight would not be able to shine. The dust from the asteroid would have blocked the sun.The mass extinction shows the defy of the dinosaurs almost towards the end of the Cretaceous period and by the beginning of the 3rd period all of the dinosaurs had vanished.The KT boundary sediments has high amount of element iridium shown, which is common in foreigner material.Extraterrestrial material is a type of material or object that has fallen out of the Earth or its atmosphere and falls onto the planet. The page will explain the evidence about the two most proved theory.Evidence about the asteroid theory The evidence to explain the asteroid theory is that a crater was then found at around 1990, 150 miles in diameter named the Chicxulub crater which is located on the Yucatan peninsula. The crater was about 120 mile gigantic or across and 1 mile deep. Seismic monitoring equipment which is knowing to hunt for oil discovered the huge crater. The iridium layer is what threesome the Alvarez team to blame an asteroid collision for the extinction asteroids and other extraterrestrial bodies are enriched with high amounts of iridium than the Earths crust The asteroid theory has gained to a greater extent evidence than any other of the theoriesEvidence against Asteroid theoryThe Asteroid theory has proved more evidence than any other theory there is still a problem with the theory. Paleontologists have to find dinosaurs fossils link to the time perio d of the impact and some evidence explains that dinosaurs might have already been extinct before this impact. Actually dinosaurs had been declining slowly before the asteroid hit the earth. There have been a lot of mass extinctions in the past history and many large asteroid collisions. Even though there have been many of these collisions they havent caused mass extinctions all around the world. The asteroid theory is still the most powerful theory to provide reasons for the extinction of the dinosaurs. Some scientist believe this impact did not cause the extinction of all the dinosaurs and other creatures, there could have been two or more collisions.Evidence to volcanic activityThe dinosaurs could have died because of a volcano. A research explains that a volcano erupted in India. The researcher said Now we find that another(prenominal) catastrophe, which is Deccan Volcanism, which has not had much attention paid to it, may be the trustworthy culprit. Volcanic eruptions on Indias Deccan plateau between 63 and 67 million years ago spewed huge amounts of sulfur dioxide into the air for around 10,000 years