Mixed Blood Assignment Example | Topics and Well Written Essays - 250 words

Mixed Blood - Assignment Example I believe that the writer is right in questioning the existence of the term â€Å"race† in our minds. Since most people believe it is a biological entity. However, one must remember that there are no biological tests that can help classify humans into different races. The author puts a question in all our minds but then answers them simply with scientific explanation. He concludes that race is nothing but a fantasy of the human mind. Human beings are one species and therefore can engage in mating. Two people from any part of the world can mate and produce a child who is sterile thereby vindicating that there is absolutely no biological or genomic difference between any races whatsoever. He further explains the origin of man and writes that man originated in Africa from where he migrated to different parts of the world. Genetics plays an important role here since random mutations, genetic drifts and other genetic changes were induced into the genome of man to help him in his survival in different surroundings. The survival of the fittest theory helped Nature select the genetic changes which were best suitable and hence this gave rise to the varying phenotypical features that we find today in different parts of the world. The writer skillfully presents his viewpoint that race cannot and should not considered a biological entity as well since this classification itself is without nay proper basis. Study of genetics can help people understand that the different features that have been inherited as a result of genetic changes are best suited for survival and are not a base for

Analysis Essay Example | Topics and Well Written Essays - 250 words - 18

Analysis - Essay Example This book is about these changes and what effective managers can do to understand and anticipate such changes and respond accordingly (Henry and Kenneth 34). The organization should also include qualities such as reliability, availability, and the background of the persons they hire. The DIY projects that they greatly encourage have to be limited and monitored in order to ensure that the hired personnel provide top quality projects instead of just a creative but shoddy piece of work (Henry and Kenneth 24). The leadership presented is the transformational style of leadership (Robbins 10) whereby the workers are not strictly monitored thereby they depend on themselves to be their own leaders, this is very effective as the workers are not bossed around and they set their own milestones with each employee trying to perform his best leading to a very productive organization (Robbins 12). The communication method presents itself as a reliable means since majority of the people are connected to the Internet due to the rise of social websites and the development of technology over the years. Distinguished by its incorporation of theory, examination, practice and a wide managerial perception, this text has a universal edge (Richard 93). It scrutinizes in detail on how people behave at work, discussing each person’s individual characteristics, their work environment, group dynamics as well as individual and combined behavior. This edition incorporates international and moral issues throughout, and discovers many interesting subjects, including Total Quality Management, managing diversity and virtual corporations (Richard

Fossil fuels Essay Example for Free

Fossil fuels Essay Fossil fuels belong to non-renewable sources of energy that are accountable for giving the energy required around the world for many families and industrial facilities like electrical generators and others. Deposits of these kinds are generally found deep within the earth surface which is often needed to be mined. Fossil fuels are also rich in carbon remains of prehistoric civilization and other creature that have lasted in severe heat and pressure deep within the earth over millions of years. Researchers said that there are three types of fossil fuels which can be utilized for energy consumption such as natural gas, oil and coal. Natural gas is a gas that consisted primarily of methane (CH4) substance. It is in the form of gaseous fossil fuels that are very flexible, plentiful and comparatively clean compared to oil and coal. It is also created and formed from the remains of marine microorganisms such as plankton and other type of small water creatures like algae. However, compared to the other types of fossil fuel, it is relatively a new kind of energy supply. In 1999 more coals are used than natural gas since people were scared that like oil, the supplies of natural gas will run out. For example, developed countries like United States, Japan and others have overtaken the consumption of coal than natural gas (Miller 1999). Moreover, some researchers forecasted that the supply of natural gas will run out by the end of 21st century. Since it is primarily consists of methane, the gas is highly compacted in a small volumes at huge depths of the earth. In terms of getting this kind of fossil fuel, it needs to be conveyed to the surface by drilling. Moreover, in terms of supply, it reserves are can be seen around the globe since it were evenly distributed unlike oil. On the other hand, oil is a liquid type of fossil fuel that is created and formed from the remains of marine organisms just like natural gas. The process is so complex that after millions of generations, the deposits will end up in a sediment and rock where oil is ensnared in small holes. Just like the natural gas, it needs to be conveyed by drilling in able to get the residue (commonly called as crude oil). Today, this kind of fossil fuel is widely used type of non-renewable sources of energy (Miller 1999). Crude oil contains various types of organic components which are brought to refining establishment to further transform the product in a more refined residue. Many types of industries including cars, jets, electricity, roads and many others utilize this kind of fossil fuel. However, oil is a kind of non-renewable sources of energy which cannot be found everywhere on earth. Thus, various events like wars resulted in shortage of search of kind of fossil fuel just like what happened in the Gulf War in 1991. Lastly, coal is a solid kind of fossil fuel that was created and formed over millions of generations by decomposes remains of land vegetation. This is formed when layers are compressed and heated over time. The results are natural deposits that are eventually turned into coal. In comparison with the two types of fossil fuel, coal is more abundant in supplies. However, some researchers forecasted that the use of coal around the world will heighten as oil supplies become inadequate. They predicted that current supplies of the coal in the world will last for at least 200 years or more. In the recent study conducted by various researchers, they found out that the use of coal was doubled in the middle of 20th century. However, at the start of 1996, there is a decline in the use of coal (McKinney and Schoch 2003). Many developing countries were the primary consumer of this kind of non-renewable sources of energy since they cannot afford the high price of natural gas and oil. Traditionally, these three kinds of fossil fuels were in abundant supply that was simple to have and transport. But now, signals are showing that these supplies are beginning to be depleted. It is a fact that it needs millions of years before these fuels will be replenished. Then one may ask, â€Å"Why are we still using fossil fuel in huge amount? † Thus, the answer is very simple and easy to explain. Fossil fuels are cheaper than any kind of reasonable alternative energy that human known. Compare to renewable energy like wave, wind and solar energy, they need large amount of money in able to obtain them. However, many scientists have already forecasted that fossil fuel will increase in price because of scarcity. Therefore this may lead to an eventual transfer from non-renewable to renewable sources of energy in the coming years. BIBLIOGRAPHY McKinney, M. L. and Schoch, R. M. (2003), Environmental Science, Systems and Solutions. 3rd ed. University of Tennessee, Knoxville USA. Miller, G. T. (1999). Living in the Environment: Principles, connections and solutions. 4th ed. Cole Publishing Company, Pacific Grove, USA.

Divergent and Convergent Plate Margins Comparison

Divergent and Convergent Plate Margins Comparison â€Å"Compare and Contrast the Topographical Features at Divergent and Convergent Plate Margins.† Jenice Culzac According to the United States Geological Survey (USGS) â€Å"a tectonic plate (also called lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere.†[1] There are two types of plates; Oceanic plates are younger crustal plates with a thickness of 5-9km of mainly basaltic composition and Continental plates are older crustal plates with thickness of 25-90Km of mainly granite composition. The area where two of these plates meet is referred to as a plate boundary. Plate tectonics is a recent theory developed around the late 1960’s from two pre-existing theories; Continental Drift by Alfred Wegener and Seafloor Spreading by Harry Hess. It suggests that the Earth is made up of eight large rigid and thick plates along with smaller ones as shown in Diagram 1 that move slowly and change size. Diagram 1 of a World map showing the tectonic plates and their direction of movement Plate tectonics has three types of plate margins or boundaries named accordingly by the type of movement; towards, away and parallel that occurs at these boundaries. They are Convergent, Divergent and Transform plate margins respectively. Due to these movements, associated landforms altering the world’s topography are created except for at Transform plate margins because the parallel movement of plates only causes the release of energy in the form of earthquakes. The aim of this essay is to compare and contrast the topographical features that occur at the Divergent and Convergent plate margins. It is imperative to know what topographical features both these plate margins produce in common at the forefront. Therefore as the discussion goes in depth as to how they are created by different processes, keeping in mind the vision of the end product which is of the same topography will enhance clarity and comprehension. The topographical features that both plate margins produce in common are volcanoes and mountain ranges. A volcano is a mountain like feature that has a vent in which lava, tephra and hot gases are expelled. A mountain range is an area of a series of mountains that are geologically related. Therefore, having established this each plate margin can be dealt with individually. Comparison Convergent plate margin also called Destructive plate margin occurs at a fault where two tectonic plates move towards each other. Due to the nature of the plates involved there can either be subduction in which the area is called a Subduction Zone or a collision in which it is referred to as Collision Zone. Density is the key factor that determines the end result of the plates involved. In the case where the plates moving towards each other are continental and oceanic such as the Indo- Austrlian and Pacific plates respectively. Oceanic plates although having a thickness of 5-9km as compared to continental’s thickness of 25-90km is denser. Hence when an impact occurs as illustrated in Diagram 2 the Oceanic plate subducts under the Continental plate into the mantle and is reabsorbed due to intense heat and pressure. The area at which this occurs is the Subduction Zone. Diagram 2 showing the convergence of an oceanic and a continental plate Lines of weakness referred to as faults can occur within the Continental plate during subduction. As the Oceanic plate subsides water is being taken along with it which produces steam. This build-up of steam adds to the pressure which then forces its way through the faults and allows for magma to erupt violently (referred to as lava when it reaches the Earth’s surface). The lava solidifies due to the cooler surrounding temperatures and forms volcanoes. A chain of these volcanoes is known as the Volcanic Arc. In the example of the plates given, this was how the Cascade Range in North America which is a part of the famously known Pacific Ring of Fire was formed. The frequency of eruptions and viscosity of lava will affect the height and gradient of these volcanoes. Therefore if the lava is less viscous it will run further distances away from the point of origin and create gentler gradients but if the lava is more viscous it will not flow as easily and solidifies at shorter dista nces allowing a faster accumulation. In addition to this scenario we can have the case in which the plates involved at a Convergent plate margin are both Oceanic. The same principle will apply and the denser of the Oceanic plates will subduct. The features produced will have the same general high relief however they are referred to as Island Arc. An example of such is the Japanese Islands where the Pacific and Philippine plates interact. The difference of names is understood if Diagram 2 and Diagram 3 are compared. The volcanoes formed in Diagram 3 are protruding from the Oceanic crust hence the Island (body of small land surrounded by water) term while in Diagram 2 the volcanoes formed protrudes from the continental plate hence the arc is just referred to as volcanic. Diagram 3 showing the convergence of two oceanic plates Volcanoes or volcanic activity are produced at Divergent plate margins regardless of the type of plates involved. When the plates move apart a gap is created which allows the magma to expel and the lava solidifies due to the same conditions as previously mentioned under Oceanic to Oceanic and Oceanic to Continental convergence. Mid ocean ridges are the dominant features formed however within these ridges are the under -water volcanoes. The ridge is indicated in Diagram 4 at the centre where it is labelled. Although the diagram gives the simplicity of an ocean ridge as two parallel lines, in actuality this ocean ridge is an extensive submarine mountain range. Diagram 4 showing the divergence of two oceanic plates The previous point introduces our second common feature, mountain ranges. At the Divergent plate margin the mid oceanic ridge would represent this submarine mountain range. Similarly at Convergent plate margins where Fold Mountains are formed this will represent the mountain ranges as well. These Fold Mountains are formed when two Continental plates travel towards each other. For example Eurasian and Indian plates which will have relatively the same densities. They will collide and fold by compressional forces forming these ranges. This is illustrated in Diagram 5 in which the Continental plate on the right is buckling having collided with the Continental plate on the left thus producing the peaks along the centre of the diagram which represents the mountain range. Diagram 5 showing the convergence of two continental plates With the example of the Continental plates given the Himalayas Mountain Range was formed with peaks of over 8,000 meters in height above sea level. Contrast On the contrary, there are differences between the topographical features of a Convergent and Divergent plate margin. These are Rift Valleys and Ocean Trenches created by divergence and convergence respectively. Rift valleys occur when faults lie at a 120 degrees angle within a Continental plate. When the plates move apart either one of the two scenarios occurs. Scenario one is the pull leaves a segment of the of the Continental plate in the centre which falls below referred to as graben as illustrated in Diagram 6 of the two opposite sides referred to as Horst in the same diagram creating a steep sided narrow valley. Diagram 6 showing the formation of a Rift Valley However, in scenario two instead of the centre segment falling, the lands on either side of the segment can rise due to a release in pressure. Overtime the said segment will reach to a point where it is below sea level causing the land mass to break away from the parent continent and creating a new ocean basin. A perfect illustration of this occurrence is the Great African Rift Valley. Diagram 7 indicates the zone of rifting which runs from Afar Triple Junction to South Mozambique and also offshore of the coast of Mozambique along the Kerimba and Lacerda grabens. Eventually the Somalian plate to the east will be completely separated from the Nubian plate on the west. Diagram 7 showing the location of the Great African Rift Valley Lastly is the ocean trenches formed at subduction zones of Convergent plate margins. According to Merriam Webster online dictionary an ocean trench is â€Å"a long, narrow, deep depression in the ocean bed, typically running parallel to a plate boundary and marking a subduction zone.† The steepness of the trench is reliant on the angle at which it is subducted. The movement and location of an ocean trench is illustrated in Diagrams 2 and 3. Diagram 8 gives a three dimensional view of Puerto Rico’s oceanic trench formed at the Caribbean and North America plate boundary. Diagram 8 of a 3 dimensional representation of the Puerto Rico Trench In summary the Divergent and Convergent plate margins have similar and different topographical features that would have been formed or is still forming as a result of tectonic plate movement. The similarities are volcanoes and mountain ranges while the differences are rift valleys and ocean trenches. Bibliography â€Å"Island.† National Geographic. http://education.nationalgeographic.com/education/encyclopedia/island/?ar_a=1#page =1(accessed September 30, 2014) Jaegar, Peter. â€Å"Plate Boundaries: Convergent, Divergent and Transform Boundaries.† Education Portal. http://education-portal.com/academy/lesson/plate-boundaries- convergent- divergent-and-transform-boundaries.html#lesson (accessed October 1, 2014) â€Å"Japan in a subduction zone.†Introduction in the Landforms and Geology of Japan. http://www.glgarcs.net/intro/subduction_2.html (accessed October1, 2014). Nelson, A. Stephan. â€Å"Earth structures, Materials, Systems and Cycles.† Earth System Science. http://www.earthsci.org/processes/geopro/introgeo/introgeo.html (accessed September 21, 2014). May 22 2013. â€Å"Plate tectonics: The ends (and beginnings) of the Earth Part 1.† Why? Because Science, September 30, 2014. http://whybecausescience.com/2013/05/22/plate-tectonics- the-ends-and-beginnings- of-the-earth-part-1/ Watson, J. â€Å"What is tectonic plate?† USGS. Last modified May 5, 1999. http://pubs.usgs.gov/gip/dynamic/tectonic.html Wood, James and Alex Gruth. â€Å"East Africas Great Rift Valley: A Complex Rift System.†Geology.com. http://geology.com/articles/east-africa-rift.shtml (accessed October 1, 2014). 1 [1] Watson, J. â€Å"What is tectonic plate?† USGS. Last modified May 5, 1999. http://pubs.usgs.gov/gip/dynamic/tectonic.html

cuban missile crisis :: essays papers

cuban missile crisis "Nuclear catastrophe was hanging by a thread ... and we weren't counting days or hours, but minutes."Soviet General and Army Chief of Operations, Anatoly Gribkov The closest the World has ever been to nuclear war was with The Cuban Missile Crisis. The lives of millions lay in the ability of President John F. Kennedy and Premier Nikita Khrushchev to reach an agreement. The crisis began when the United States discovered that just ninety miles from the coast of Florida, the Soviet Union had set up nuclear missiles. On October 22, Kennedy announced the discovery of the missile installations to the public and his decision of the naval quarantine around the island. He also announced that any nuclear missile launched from Cuba would be regarded as an attack on the United States by the Soviet Union and demanded that the Soviets remove all of the missiles from Cuba. For thirteen days the two major superpowers of the world were on the verge of a nuclear war. The events leading up to the missile crisis as explained by Dinerstein were the long years of Cold War hostility and the revolutions occurring in countries of Latin America. The Soviet Union’s fear of losing the race in the weapons department and Cuba’s fear of an invasion by the United States sparked those thirteen stress filled days. In 1960 the United States imposed an embargo that cut off trade between the United States and Cuba because it was afraid that Castro would establish a Communist regime. Castro was determined not to give in to the pressure that was put on by the United States and decided to establish closer relations with the Soviet Union. An attempt was made by the United States to disintegrate Castro’s rule with the Bay of Pigs Invasion. The United States was easily defeated by Castro’s army. His victory during the Bay of Pigs Invasion asserted Castro's rule over Cuba. Most Cubans resented the intervention by the United States in Cu ban affairs. This resentment caused Castro’s supporters to increase in large numbers. With a confirmed rule over Cuba, Castro declared the island a Communist nation. Soviet premier Nikita Khrushchev made the wrong assumption by thinking that the United States would not take any action when it supplied Cuba with nuclear war heads.

Free Macbeth Essays: The Murder of King Duncan :: Macbeth essays

The Murder of King Duncan in Macbeth  Ã‚      Many factors were involved in Macbeth's decision to kill King Duncan. He had pressure from his wife, he had an idea in his head, given to him by the three witches, and he was extremely ambitious. All of these factors contributed to his demise in the end and his decision to murder his king.    This whole situation comes about because of three witches who wanted to cause trouble for Macbeth. They knew all along what would happen to him in the end. Macbeth is ambitious and the witches played upon that by promising Macbeth great things, such as becoming the king of Scotland, and Thane of Cawdor. Immediately after he talks with the witches, he is by chance entitled, Thane of Cawdor. Macbeth now believes in the witches’ words and honestly believes that the crown of Scotland will fall upon him by natural means. This idea goes awry when Duncan names Malcom his heir. Macbeth then, still believing in the witches, goes on with his plan to murder Duncan.    Lady Macbeth is a very loving wife to Macbeth and she wants to do anything she can for him to achieve his goals. She just takes it a little too far, and she puts too much pressure on Macbeth to commit crimes that he is not sure he wants to do. After Macbeth sends her a letter about the witches’ premonitions, Lady Macbeth is no longer the sweet innocent lady we expect her to be. She turns into a person who is just as ambitious as her husband and she wants to do whatever it takes to help him get Duncan out of the way. She even goes to the point of calling Macbeth a coward, and mocking his bravery when he fails to complete the job. She is even willing to do it herself (plant the bloody knife with the guard). Lady Macbeth is constantly putting the pressure on Macbeth to do things that he is not sure about. She almost turns into a bully who dares Macbeth to go out and do evil things. She even says in a soliloquy that she wants to be released of all her morals and values so that she can help him commit these crimes.    Finally, we have to look at the tragic flaw of the hero himself.

An Analysis of Charlotte Brontes Jane Eyre :: Jane Eyre Essays

An Analysis of Jane Eyre  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   The novel is rich in poetry, symbolism and metaphor. It does not fit easily into a definite pattern, being neither a novel of "manners" in the tradition of Austen, or a straightforward Gothic Romance in the style of Mrs Radcliffe. What Charlotte Bronte did was to create a work which cleverly blends elements of the two styles, and which remains uniquely independent of them at the same time, since it addresses issues which were at the time rather controversial. The novel is written in the first person, and thus magnifies the central character - the reader enters the world of Jane Eyre and is transported through her experiences at first hand. This at once makes the work subjective, especially since we know that Charlottes Brontes own life and experiences were so closely interwoven with the heroine's. As well as this we learn only at the end of the novel that the events are being related to us ten years after the reconciliation with Rochester - thus the narrative is RETROSPECTIVE (looking back). CB is clever in blending the narrative so that at times Jane seems to be speaking as an adult with adult hindsight , while at others she she is "in the middle" of them, as a child or young woman. The indecision which is a central issue in the book, is heightened by this device. We never know, as readers, whether to be entirely trustful of Janes actions and thoughts, because we are never sure wheher she is speaking impulsively or maturely. This intensifies the readers dilemma as to what is "right" and "wrong" in the dramatic relationships which are part of JE's life. Can we believe what the heroine says, or is she deceiving herself? The novel is primarily a love story and a "romance" where wishes come true but only after trials and suffering. The supernatural has its place, as do dreams, portents and prophesies. The heroine begins poor and lonely and ends up rich and loved; the orphan finds a good family to replace the wicked one; all the basic ingredients of classic romantic fairytale are present. The romantic element is present in two forms in Jane Eyre; the "family" aspect is dealt with in the Gateshead, Lowood and Moor House episodes, which involve the exchanging of the wicked Reed family for the benevolent Rivers one; and the Love romance is dealt with in the Thornfield and Ferndean episodes.