The Cause of the Mass Extinction in the Late Cretaceous Period Dinosaurs first appeared around 245 million years ago‚ and they lived for 180 million years. Then suddenly‚ 65 million years ago they went extinct. Not only did all the dinosaurs die out‚ but also up "to 75% of all marine genera were lost" ("mass extinction"). This leaves scientists wondering about what could have led to this mass extinction in the Cretaceous Period. They have collected evidence from fossils and earth’s geography‚ to
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changed greatly since the 1960s and 1970s‚ when there existed a virtual consensus among Western experts that rapid population growth in the developing world represented a serious global crisis. One of the primary causes of environmental degradation in a country could be attributed to rapid growth of population‚ which adversely affects the natural resources and environment. The uprising population and the environmental deterioration face the challenge of sustainable development. The existence or the absence
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extinction is the end of an organism or of a group of organisms (taxon)‚ normally a species. Ordovician-Silurian extinction‚ global extinction event occurring during the Hirnantian Age (445.6 million to 443.7 million years ago) of the Ordovician Period and the subsequent Rhuddanian Age (443.7 million to 439 million years ago) of the Silurian Period that eliminated an estimated 85 percent of all Ordovician species. This extinction interval ranks second in severity to the one that occurred at the
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2008 Conditions We Deal With Everyday for ‘Freedom’. In Tsitsi Dangarembga’s novel Nervous Conditions the author Depicts Nyasha‚ the daughter of rich educated Babamukuru‚ as a troubled hybrid character who can’t accept herself due to her internal struggle with hybridity. Looking to gain insight and self-awareness based on her mixed cultural background‚ Nyasha challenges herself to take control of her own life. The statement in the introductory paragraph of Nervous Conditions‚ “The condition
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In the article titled “Meteor likely caused the Earth’s Greatest Extinction Event” the author states that “About 60 meteorites five or more kilometers across have hit the earth in the past 600 million years. The smallest ones would have carved craters some 95 kilometers wide. “Most scientists agree that one such impact did in the dinosaurs‚ but evidence for large collisions coincident with other mass extinctions remained elusive until recently.”The increased attention brought about the discovery
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Atticus Finch is a lawyer in a small town called maycomb county. He is a very gentle and kind character. Atticus has two kid named Jem and Scout‚ they don’t call him dad yet they have a very close relationship together. Atticus never is a rude or hateful person he is always characterized as nice‚ if he was ever rude he was most likely just doing his job. By Atticus being kind hearted‚ loving‚ and gentle he is able to create a good name for himself and for people to look up to him. Atticus is very
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Atticus Finch always stood up for what he believed in‚ no matter the consequences. He lost friendships and attracted trouble from defending Tom Robinson‚ but by staying so defiant he subtly passes on wisdom to his children Jem and Scout about taboo subjects such as racism. Atticus always appeared to be a friendly man‚ who showed compassion to people regardless of their social class or skin colour. An example of this is when Walter Cunningham was invited to dinner‚ and straight away Atticus spoke
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LEAD AND MANAGE PEOPLE 1. In this case study the owner Kim Jones uses Kurt Lewins s Laissez-faire leadership style‚ as she appointed Pierre Muller as a head chef and she just informed him that she is expecting him to improve the performance of the kitchen in whatever manner he thought appropriate. She has minimal involvement in decision making‚ leaving it to the stuff. She had not heard any complaints about Muller‚ so she assumed that everything was running satisfactorily.
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Lead and The Environment Some materials are so commonplace that we take them for granted. One of those materials is a grayish metal that has been with us for thousands of years. That metal is lead‚ still one of the world’s most useful substances‚ and one that never ceases to find a role in human society. Lead has the atomic symbol of Pb (for plumbum‚ lead in Latin). The atomic number for lead is 82 and the atomic mass is 207.19 AMU. It melts at about 327.502 oC and boils at 1740 oC. Lead
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Lead Poisoning One out of every six children under the age of six are suffering from health disorders due to the poisonous metal‚ lead. Lead is a natural occurring bluish-gray metal found in the earth’s crust. It has no taste or smell. Lead can easily be found in all parts of our environment today. Most of it comes from mining‚ manufacturing‚ and the burning of fossil fuels. In the United States lead poison has increased because of the lack of knowledge in our society. Lead is released into the
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