Cretaceous-Tertiary Mass Extinction

Cretaceous-Tertiary Mass Extinction Scientists across several disciplines, including geology, biology, and evolutionary biology, have determined that there have been five major mass extinction events throughout the history of life on Earth. For an event to be considered a major mass extinction, more than half of all known life forms in that time period must have been wiped out. Cretaceous-Tertiary Mass Extinction Probably the best-known mass extinction event took out all the dinosaurs on Earth. This was the fifth mass extinction event, called the Cretaceous-Tertiary Mass Extinction, or K-T Extinction for short. Although the Permian Mass Extinction, also known as the Great Dying, was much larger in the number of species that went extinct, the K-T Extinction is the one most people remember because of public fascination with dinosaurs. The K-T Extinction divides the Cretaceous Period, which ended the Mesozoic Era, and the Tertiary Period at the start of the Cenozoic Era, which we currently live in. The K-T Extinction happened around 65 million years ago, taking out an estimated 75% of all living species on Earth at the time. Many people know that land dinosaurs were casualties of this major mass extinction event, but numerous other species of birds, mammals, fish, mollusks, pterosaurs, and plesiosaurs, among other groups of animals, also went extinct. Asteroid Impacts The main cause of the K-T Extinction is well documented: an unusually high number of extremely large asteroid impacts. Evidence can be seen in various parts of the world in layers of rock that can be dated to this time period. These rock layers have unusually high levels of iridium, an element not found in large amounts in the Earths crust but is very common in space debris such as asteroids, comets, and meteors. This universal layer of rock has come to be known as the K-T boundary. By the Cretaceous Period, the continents had drifted apart from when they were one supercontinent called Pangaea in the early Mesozoic Era. The fact that the K-T boundary can be found on different continents indicates the K-T Mass Extinction was global and happened quickly. Impact Winter The impacts werent directly responsible for the extinction of three-quarters of the Earths species, but their residual effects were devastating. Perhaps the biggest issue caused by the asteroids hitting Earth is termed impact winter. The extreme size of the space debris vaulted ash, dust, and other matter into the atmosphere, essentially blocking out the Sun for long periods of time. Plants, no longer able to undergo photosynthesis, began to die off, leaving animals with no food, so they starved to death. Its also thought that oxygen levels declined due to the lack of photosynthesis. The disappearance of food and oxygen affected the largest animals, including land dinosaurs, the most. Smaller animals could store food and needed less oxygen; they survived and thrived once the danger passed. Other major catastrophes caused by the impacts included tsunamis, earthquakes, and possibly increased volcanic activity, yielding the devastating results of the Cretaceous-Tertiary Mass Extinction event. Silver Lining?   As horrific as they must have been, mass extinction events were not all bad news for those that survived. The extinction of the large, dominant land dinosaurs allowed smaller animals to survive and thrive. New species emerged and took on new niches, driving the evolution of life on Earth and shaping the future of natural selection on various populations. The end of the dinosaurs particularly benefited mammals, whose ascendance led to the rise of humans and other species on Earth today. Some scientists believe that in the early 21st century, we are in the middle of the sixth major mass extinction event. Because these events often span millions of years, its possible that the climate changes and Earth changes- physical changes to the planet- that we are experiencing will trigger the extinction of several species and in the future will be seen as a mass extinction event. Sources K-T Extinction: Mass Extinction. Encyclopaedia Britannica.Cretaceous-Tertiary Extinction Event. ScienceDaily.com.Why Did the Dinosaurs Go Extinct? National Geographic.

How to Grow Ammonium Phosphate Crystals

How to Grow Ammonium Phosphate Crystals Monoammonium phosphate is one of the chemicals included in commercial crystal growing kits because it is safe and practically foolproof for producing a mass of crystals quickly. The pure chemical yields clear crystals, but you can add food coloring to get any color you desire. The crystal shape is perfect for green emerald crystals. Difficulty: Easy Time Required: 1 day What You Need Monoammonium phosphateHot waterClear container Growing Monoammonium Phosphate Crystals Stir six tablespoons of monoammonium phosphate into 1/2 cup of very hot water in a clear container. I use water heated from an electric drip coffee maker and a drinking glass (which I wash before using it again for beverages).Add food coloring, if desired.Stir until the powder is completely dissolved. Set the container in a location where it wont be disturbed.Within a day, youll have a bed of long, thin crystals blanketing the bottom of the glass, or perhaps a few large, single crystals. Which type of crystals you get depend on the rate at which the solution cools. For large, single crystals, try to cool the solution slowly from very hot down to room temperature.If you get a mass of crystals and wanted one big crystal, you can take a small single crystal and place it in the growing solution (either new solution or the old solution that has been cleared of crystals) and use this seed crystal to grow a large, single crystal. Tips If your powder doesnt completely dissolve, it means your water probably should have been hotter. Its not the end of the world to have undissolved material with these crystals, but if it concerns you, heat the solution in a microwave or on the stove, stirring occasionally, until its clear. Monoammonium phosphate, NH4H2PO4, crystallizes in quadratic prisms. The chemical is used in animal feed, plant fertilizers, and is found in some dry chemical fire extinguishers. This chemical may cause irritation and itching. If you spill it on your skin, wash it off with water. Inhaling the powder may lead to coughing and a sore throat. Monoammomium phosphate is not toxic, but its not exactly edible.

Torture and Ethics Paper Research Example | Topics and Well Written Essays - 1250 words

Torture and Ethics - Research Paper Example The paper further examines if torturing violates the basic human rights provided in the First Amendment and the Bill of Rights. Eventually, it determines if the act of torture is justifiable under any ethical theory. Torturing Enemy Combatants or High-value Targets and Standards of Morality in America Torturing of enemies or criminals has been contrary to the values and morals of the Americans for long time. The Bill of Rights under the American Constitution prohibited bizarre and cruel punishments (Greenberg, 2006). Furthermore, the United States’ government, besides Americans, has condemned countries across the world that practices any act of torture. This is exemplified by the country granting asylum to individuals fleeing their countries for fear of acts of torture (Wijze, 2006). In the history of criminology and jurisprudence, the act of torture always has been distinctive. Torture forms part of the ancient techniques of punishment, which are severe. Torture is regarded a s capital punishment in which the captors apply force and brutality to obtain compliance from the criminal suspect (Ginbar, 2008). A section of the society has argued always that people who torture suspects are sadists, deriving pleasure from agony and pain of other persons. Any form of physical or psychological coercion is unacceptable for use on terrorist criminals or suspects because it amounts to inhuman and undignified treatment, diminishing the mental abilities of the targets. Depriving fellow humans of their rights and liberties of which individuals should be custodians to is morally unacceptable. Acts of torture remain evil practices to be detested and avoided (Wijze, 2006). A majority of the civilized societies across the world perceive torture as an inhuman and savage act that should not be practiced on humans. Consequently, the use of torture has received massive criticism and condemnation as well as protests (Wendel, 2005). The emergence of increased terrorist attacks af ter the 9/11 attacks, which led to the American government to adopt the policy of torture, has witnessed mixed reactions from the society over torture of suspected terror attack criminals or war prisoners (Ginbar, 2008). The international community prohibits torture through the conventional legal agreements, such as the Geneva Conventions, of which America is party to. Practicing acts of torture is a violation of the morality standards set out by the international agreements, which embody universally true and indefeasible human dignity values. Treating terrorist criminals and suspects in an inhumane way is morally irrelevant. All humans are equal and entitled to some incontrovertible rights of which dignity, found within life, liberty, and pursuit of happiness, is among them (Greenberg, 2006). The United States breaches the principle of standards of morality that it advocates for and loses its moral authority when it practices acts of torture in any circumstances (Davis, 2005). The totalitarian states find a loophole in resisting the changes demanded of them by the international community. The application of coercion is morally repugnant because it exposes America to allegations of hypocrisy, undermining its efficacy. Act of Torture: Violation of Basic Human Rights and Global Implications The use of torture to obtain crucial and critical information from criminal suspects,

(Ethics and Communication) Illinois among states to settle with Article

(Ethics and Communication) Illinois among states to settle with GlaxoSmithKline - Article Example Although the two main ingredients: Kytril and Bactroban were not fully contaminated, the tablets possessed not a full dose of an active ingredient which did not satisfy the appropriate percentage of the substance listed in the bottle. Although the company denied of fraud, the head attorney confirmed that the accusation was legit and the attempt to earn revenue through illegal practices were exercised. Without a doubt, this article depicted the controversy related to a company who was charged of fraud because of varied content of substance in their capsules. Although the company has an excellent reputation for following compliances implemented by the government; these type of instances should still be taken into account. Ethically speaking, the company should have made some attempt to at least inquire with the FDA to discuss the gravity of this situation. However, the company instead is denying the charges that it made to benefit itself in the long-run. Clearly, this type of hostile a ttitude does not only poses a risk for corporate ethics; it also serves as a reminder of these type of scenarios can be detrimental to society itself. Corporations must make it their obligation to take responsibility in any sort of moral dilemmas so they lives of many can be saved.

Why drugs should remain illegal in America Essay Example for Free

Why drugs should remain illegal in America Essay Why drugs should remain illegal in America Introduction            Over the years, there has been a raging debate on whether drugs should be legalized in the United States or not. There are those who believe that drugs should be made legal and accessible to all Americans and those who argue that they should not be legalized. Proponents of drug realization argue that the current drug laws are harmful to the society and violate the personal freedoms. Moreover, they argue that enforcing drug laws is a wastage of public resources that could be used in more meaningful public projects. Despite these seemingly convincing arguments, I believe that drugs should remain illegal in the United States (David Edward,2013 ).            To begin with, research has established that there is link between drugs and increased crime rates. Many of the crimes that happen in America are related to drug abuse. This means that drug legalization in America will result in increased crime rates in the country. Secondly, drugs should remain illegal in the United States because they have very negative effects on the health of the users. As people continue to abuse drugs, their bodies become over dependent on them resulting in health complications. Other than health, drugs also have a negative effect on the economy and the general quality of life of Americans. Currently, the American health care industry is already overburdened and would be brought to its knees if drugs were legalized (David Edward,2013 ). Although proponents of drug legalization argue that public money spent on enforcing drug would be saved through legalization, this money would be spent on treating drug related matters. The money from drugs w ould not compensate for things like for fetal defects, loss of jobs, industrial accidents, road accidents and high rates of domestic violence. Reference David Simon, Edward Burns. (2013). The Corner: A Year in the Life of an Inner-City Neighborhood.Crown Publishing Group Source document

Gender Essay -- essays research papers fc

â€Å"A businessman is aggressive; a businesswoman is pushy. A businessman is good on details; she is picky. He follows through; she doesn’t know when to quit. He stands firm; she is hard. His judgements are her prejudices. He is a man of the world; she’s been around. He isn’t afraid to say what is on his mind; she is mouthy. He exercises authority diligently; she’s power mad. He’s closemouthed; she’s secretive. He climbed the ladder of success; she slept her way to the top. From the first moment a child begins to understand the spoken word, they begin to receive messages about societies view of the different sexes. Language itself can not be deemed good or bad, but it does reflect individual or societal values. The above example displays the way in which language can be used to stereotype gender. Both sexes in the example are behaving in the same way but the language used has separated them, praising the male while disparaging the female. In order to explore the differences between males and females regarding language we must look at whether or not language is sexist, whether it is used differently by different genders and how language has changed, if at all, in relation to these points. Women’s roles in society have changed considerably over time, and they are now valued more than ever in society. It has been claimed that this has largely arisen due to the media. It has been said that newspapers and magazines now largely avoid sexist language, and even advertisers have changed their depiction of both genders to some degree. Universities have expanded their curricula to include courses for women, even hospital’s have changed their policies pertaining to childbirth in directions originally propounded by women’s movement activities; i.e. developing birthing centers etc. These examples are merely a few of the multitudes of changes that have occurred. It has been pointed out that the utilization of language differs with gender. For instance, women have more of a tendency to use finer discriminations than men do in some areas such as color terms. Women would be more at ease using the labels ‘Crimson’, ‘ecru’, or ‘beige’, more than men and men would be found to use the simpler version: â€Å"It’s blue, not cornflower.† It’s also been noted that men have a tendency to drop more expletives into a conversation than women, although some women do swear, especially younger fem... ...ten exploited as sexual objects. Women are described by their appearance while men normally are not, the implied message being that looks are more important for women and also the cause of their circumstance. In drawing an overall conclusion we have found that language itself is not sexist, but has been used by a male dominated society to oppress and denigrate females. Slowly but surely through a wave of feminist movements, this fact is being recognized. Steps are being taken to try and correct this and to give females a chance at being equal and not second class citizens. The more I became engrossed in this assignment the more I realized (being female) that we are being belittled by men’s use of language. It is true that many women apologize for their existence when conversing in general but more especially when interacting with men. This appears to be due to a general feeling of inferiority or lack of confidence. When society itself institutionalizes such attitudes, the language reflects the bias. When everyone in society is truly created equal and treated as such there will be little concern for the asymmetries that exist in the language. Bibliography: CrossCultural Psychology

Lessons learnt from failure

Failure, it comes to everyone in different measures but only a handful of them gain from it. I also experienced a heart breaking failure which had a great impact on my life. At the age of seven I was introduced to chess. Though I did not have any Inclination towards the game my parents wanting me to stay occupied enrolled me in a chess academy where I learnt to play chess. I took to chess very quickly and surprisingly In a week's time I started playing better than most of the guys my age. I started winning trophies and certificates and playing lots of tournaments and inning most of them.I gained recognition and became famous In my town as a chess champion. I even won the state level championship which proved I was better than thousands of players In my state. All this at the tender age of ten made me an overconfident boy with a â€Å"greater than thou attitude However as a child I did not realize the amount of hard work and practice that I would have to put In to reach the national levels. I started taking things for granted, those early wins had gone to my head and though my parents encouraged me to practice I was reluctant as there was to much challenge for me in my small town.Hence I started playing chess on the computer and soon I reached the level with the highest difficulty, but very soon I got bored of it. The happiness that I would get from defeating a real person eluded me when played in front of a machine, which resulted in me getting disinterested in practicing chess, failing to realize that without practice I would never reach my goal of becoming a national champion. My parents persuaded me a lot but I was stubborn and did not realize that I would soon lose the mastery I developed with so much effort.Though I had stopped playing chess I never lost my overconfident attitude. Ultimately the time came for me to play the qualifying rounds for the national level tournament, as expected I went there overconfident of victory and played such an important t ournament without any practice. The results were obvious, I was defeated in the very first round and at that moment I experienced the worst failure in my life. At that time I realized my game had degraded and my skills as a chess player had deteriorated.I lost my confidence and became utterly dejected and devastated and eve up on chess. This was the biggest mistake of my life as I let depression get the better of me. I was deeply hurt and ashamed and withdrew into my shell for quite some time. After a couple of years one of my female competitor went on to become a grand master in chess , lots was being written about her In the news papers along with displays of photographs, making me feel all the more ashamed of myself. That ‘s when learnt the most valuable lessons which will stay with me for the rest of my life.First one was that never ever give up on your dream come what may, In other words resistance Is paramount and second one was that nothing can be gained without hard wo rk. Now as my academics also require attention I have resumed playing chess just as my hobby, at the same time I have firmly resolved to give my best to whatever I decide to do in life and steer the ship of my life to the shores of success. I am a totally different person after tasting failure and I feel I am more mature and more committed as an individual and am sure that I will bring value as a person to which ever institution I get admission to. Seasons learnt from failure By Garn-Ideas inclination towards the game my parents wanting me to stay occupied enrolled me in surprisingly in a weeks time I started playing better than most of the guys my age. I winning most of them. I gained recognition and became famous in my town as a than thousands of players in my state. All this at the tender age often made me an overconfident boy with a â€Å"greater than thou attitude â€Å". However as a child I did not realize the amount of hard work and practice that I would have to put in to reach the when I played in front of a machine, which resulted in me getting disinterested inUltimately the time came for me to play the qualifying rounds for the national level grand master in chess , lots was being written about her in the news papers along with displays of photographs, making me feel all the more ashamed of myself. That's when I learnt the most valuable lessons which will stay with me for the rest of my life. First one was that never ever give up on your dream come what may, in other words persistence is paramount and second one was that nothing can be gained without chess Just as my hobby, at the same time I have firmly resolved to give my best to

Allelopathy Lab Essay

INTRODUCTION The purpose of this lab was to observe the effects of chemical warfare among plants. Plant seeds compete with other plants and seeds, for sunlight, and nutrients in order to germinate. In order to win dominance over other seeds, and reduce competition, plants produce and release a chemical in order to prevent other seeds from germination. This type of chemical warfare is referred to as allelopathy. Allelopathy exists in many parts of the plants such as leaves, roots, stems, or fruits, but not limited to just the plants. These toxic chemicals can also be found in the surrounding soil, to prevent other plants or seeds from absorbing proper nutrients to stimulate growth. Groups will test for the presence of allelopathic chemicals in plant shoots from the chaparral community. If the hollyhock exhibits allelopathy, then an extract will inhibit the germination, and or growth of the radish seeds. MATERIALS & METHODS The group prepared for this experiment in the lab of Professor Sadler at SBVC on the second floor of the HLS building. First, the groups set up for this lab by gathering leaves that Professor Sadler had already bagged and identified. Each sample was cleaned and striped of everything most importantly the stem, so that all was left was the leaf its self. Then each group weighed out Ten (10) grams of leaves, and then placed into a blender with One hundred (100) milliliters or water. The group then blended the leaves and water until the mixture was a very thin fluid. Three (3) folded cheesecloth’s were placed into a funnel in order to remove any solids from the fluid itself, then poured into a small beaker, to be used later on in the experiment. Then each group prepared two (2) Petri dishes, by placing three (3) filtered papers in the bottom of each Petri dish. After the filtered paper was placed into the bottom of each dish, twenty (20) radish seeds (Raphanus sativus) were then placed on top, and evenly distributed throughout both Petri dishes, as to make sure none of them were touching. A final filtered paper was placed on top of the seeds and ten (10) milliliters  were of distilled water was poured over the seeds of one Petri dish, the lid was then placed on the Petri dish and labeled â€Å"control†. In the other Petri dish, the ten (10) milliliters of the filtered and blended mixture was added to the second Petri dish to make sure the filter papers were evenly saturated. The second lid was then placed over the Petri dish and labeled â€Å" hollycock†. The Petri dishes will then sit for a week for germination and then evaluated. RESUTLS After one week of germination, the group removed the lids of each Petri dish, and removed each seed that had germinated and measured the length of the entire stem and leaves. Please notice the attached page for the data of each seed. In the Petri dish labeled â€Å"hollycock†, Experiment Group A. the group tested a total number of twenty (20) radish seeds (Raphanus sativus), out of the twenty (20) seeds, there was only a twenty-five (25) percent of germination, and only five (5) seeds had actually germinated. The length of each seed varied in lengths from the shortest, three (3) millimeters to the longest fourteen (14) millimeters. Each length of all twenty (20) seedlings were added up and divided by twenty (20) and the group averaged 2.7 millimeters in length of the germinated seedlings. In the second Petri dish labeled â€Å"control†, Experiment Group B, out of the twenty (20) radish seeds tested with just distilled water, a percentage of eighty-five (85) percent of successful germination, and the actual number was seventeen (17) actually germinated. The length of these seeds varied in sized from the shortest of seven (7) millimeters to the longest of ninety-two (92) millimeters. Each length of all germinated seeds from the controlled group were added up and then divided by twenty (20) and the average length of the germinated seedlings is 19.35 millimeters. DISSCUSSION As a result of this lab it has been prove that the hypothesis is in fact correct. In reference to the group’s data, the radish seeds exhibited allelopathy, but a majority of them not germinating. Allelopathy derives from two separate words, allelon which means â€Å"each other† and pathos means â€Å"to suffer.† It is a type of chemical warfare that is used between plants and against other plants. Oddly enough, experiment group B, the controlled group seeds, that received the distilled water, germinated more then the  experiment group A, the ones that received the blend of water and hollycock leaves. The only problem that the group faced was that it was difficult to completely blend the leaves of the hollycock plant to make it liquefiable enough to get just enough out to pour over the radish seeds. Other variables that could have possibly affected germination of the seeds, was but are not limited to, the amount of sunlight that was given to the seeds, and or if the liquid was evenly distributed. Although, the group measured out the exact amount of liquid needed for the seedlings, I can only wonder if some of the proteins or nourishments were left in the solid blending in the cheesecloths? In the end the hypothesis was supported by the groups data as the hollycock did exhibit signs of allelopathy.

Robinson Crusoe Essays - English-language Films, British Films

Robinson Crusoe Essays - English-language Films, British Films Robinson Crusoe Robinson Crusoe was written by Daniel Defoe. The novel was first published in 1719. It tells the story of a young explorer who becomes marooned on a deserted island. His experiences of the island change his outlook on life. Daniel Defoe was a short story writer that came from an poor family. Defoe was poor for most of his life and made his living as a butcher and a writer. Defoe mostly wrote short stories and political essays. Robinson Crusoe was a combination of two short stories. Many believe Defoe used Robinson Crusoe to portray himself in a certain ways. The description was almost identical to his own and after his wife left him, he felt as if he was marooned on a deserted island. The story takes place in the 1700s on a deserted island somewhere off the coast of Brazil. The island is fairly large in size and has a small shore. The interior of the island has many trees, wild pigs and other small animals and a small cave in which Crusoe stores food. I walked about the shore lifting up my hands. Look around, I see nothing but water, a forest, and the remains of my ship. At first, I was afraid of wild animals but after some exploration of the land, the only animals I had seen were wild pigs, squirrels, and some small birds. The only possessions that Crusoe retrieved from the remains of his ship were a small knife, a box of tabacco, a pipe, and a small book that would later become his journal. Robinson Crusoe was a young and stubborn explorer. He was extremely tall and strong. His stay on the island changed him from a mean, stubborn man to an open-minded protestant. Standing at six feet, two inches and having my long, thick brown hair back in a ponytail, I felt as if I was eight feet tall. Without the permission of my parents, I was still sailing away from the misery. I held the cargo box is my strong arms, waiting to board my beautiful ship. Crusoe became a skilled craftsman and was an extremely religious man due to his stay on the island. Being the only man on the entire island, he established a faith in God. He also became more articulate from writing in a journal daily. Overall, his stay on the island changed Crusoe's life greatly. As the story begins, Robinson Crusoe defies his parents and sets out to sea. Crusoe encounters a series of violent storms at sea and ends up in Africa. He sets out on another voyage and is captured by the Sallee, a group of pirates. Luckily, he manages to escape and board a Portuguese ship and sail to Brazil. While in Brazil, Crusoe purchases a large sugar plantation. After leaving Brazil, he encounters another storm in which his ship is destroyed and he is marooned on an island as the only survivor. On the island, Crusoe gathers food and builds a small shelter. He writes in a journal to keep account of his stay. Crusoe becomes a skilled craftsman and begins to feel a spiritual connection with God. He also builds a small boat that he uses to sail around the island. After living on the island for fifteen years, Crusoe discovers that savages had landed on the island and that they perform human sacrifices. Crusoe helps a prisoner escape from these savages. He names the prisoner Friday and teaches him english. Together, they build a new boat and attempt to leave the island. However, Friday learns his father is a prisoner of the savages. Crusoe and Friday return and rescue his father and a Spaniard. The four men board a passing boat and gain control of it. Crusoe sails back to his native land to learn his sugar plantation has made him rich. He sells the plantation and marries. As the novel closes, Crusoe is persuaded to take a final voyage, back to the island. Robinson Crusoe is written using an English dialect. The narration of the novel is simple, informal and extremely easy to understand. However, Defoe uses verbose descriptions for characters. He was a comely, handsome fellow, perfectly well made, with strong limbs, not too large, tall and well-shaped, and I reckon he was about twenty years of age. The color of his skin was not quite black, but very tawny; and yet not of an ugly, yellow, nauseous tawny, as the Brazilians and Virginians, and other natives are; but of a bright

Perdón I-212 por deportación de Estados Unidos

Perdà ³n I-212 por deportacià ³n de Estados Unidos Los extranjeros deportados o expulsados de Estados Unidos reciben una penalidad y no pueden ingresar legalmente por un tiempo de castigo, excepto si obtienen un perdà ³n conocido como waiver I-212. El tiempo de castigo puede ser de 5, 10, à ³ 20 aà ±os o incluso de por vida, dependiendo de la razà ³n de la deportacià ³n. En este artà ­culo se explica cundo no es necesario pedir este waiver, tambià ©n conocido en algunos paà ­ses como perdà ³n o permiso, cà ³mo se solicita cuando sà ­ es necesario, tarifa que debe pagarse con la solicitud, tiempo que se demora en resolverse, quà © hacer si se obtiene la aprobacià ³n de este perdà ³n y cundo es necesario adems presentar otro perdà ³n conjuntamente.  ¿Cundo NO es necesario solicitar este perdà ³n? No todos los extranjeros que han sido expulsados o deportados de Estados Unidos necesitan este perdà ³n como paso previo para solicitar una visa no inmigrante -como por ejemplo la de turista o trabajo temporal -  o una visa de inmigrante  para la tarjeta de residencia (green card). Por lo tanto, si no se necesita, no solicitarlo, porque serà ­a una pà ©rdida de tiempo y de dinero. Y es que no precisan pedir este perdà ³n las personas en cualquiera de las siguientes categorà ­as: 1. - Los extranjeros que llegaron a un puesto migratorio de Estados Unidos y se les permitià ³ retirar su solicitud de ingresar al paà ­s. 2.- Los extranjeros que al llegar a un puesto migratorio de Estados Unidos fueron parados y se les impidià ³ el ingreso al paà ­s pero no fueron objeto de una expulsià ³n inmediata oficial. Esto es muy importante, porque hay que distinguir cuando ha habido una expulsià ³n y cuando simplemente no se admite al extranjero y se le devuelve al paà ­s del que ha llegado. Esta diferencia es fundamental. Hay que mirar quà © papeles se firmaron o fueron entregados. 3.- Los extranjeros que fueron parados en la frontera intentando cruzar ilegalmente pero, por la razà ³n que sea, no recibieron una orden de expulsià ³n inmediata. Es muy importante saber si se recibià ³ una o no. 4- Los extranjeros que llegaron a un puesto migratorio sin visa por pertenecer a un paà ­s de Programa de Exencià ³n de Visados y no se les permitià ³ el ingreso. Esto es importante para los turistas y personas de negocio chilenos y espaà ±oles. 5.- Los casos de salida voluntaria, cuando se salià ³ de Estados Unidos dentro del plazo previsto. Esta es una excepcià ³n muy importante. 6. - Los solicitantes de visa U por và ­ctima de violencia que se encuentran en Estados Unidos y piden un ajuste de estatus. 7.- Y, por à ºltimo, aquellos expulsados o deportados de Estados Unidos que ya han cumplido el tiempo de la penalidad. Por lo tanto, es fundamental saber el monto de los aà ±os que aplican a cada caso. Y es que para algunos extranjeros la penalidad dura 5 aà ±os, para otros es de 10 y para otros, 20 y, finalmente, para otro grupo existe lo que se conoce como prohibicià ³n permanente (permanent  bar en inglà ©s). Para conocer con certeza por cunto tiempo es la penalidad y los cargos se deben consultar los rà ©cords de corte, en casos de deportacià ³n, incluyendo la orden del juez y el documento que se denomina Notice to Appear in Removal Procedeedings. En el caso de expulsià ³n inmediata, es aconsejable tener el rà ©cord de la CBP (Patrulla fronteriza) y del Notice of Expedited Removal. En los casos en los que la dicta un juez por ser un caso de arriving alien tambià ©n es importante ese documento. En otras palabras, solo es necesario solicitar este perdà ³n si todavà ­a no ha pasado el tiempo de la penalidad y se quiere solicitar una visa no inmigrante o una visa inmigrante para ingresar a Estados Unidos. En este punto puede surgir la duda de quà © pasa con aquellos extranjeros que tienen una penalidad de prohibicià ³n permanente,  ¿pueden pedir un perdà ³n? La respuesta es que sà ­ en las siguientes condiciones: En primer lugar, si la prohibicià ³n permanente es porque se estuvo ilegalmente en Estados Unidos por ms de un aà ±o (no tiene que ser corrido), despuà ©s se salià ³ del paà ­s y se ingresà ³ o se intentà ³ ingresar posteriormente de forma ilegal y se desea pedir una visa no inmigrante, en este caso se puede pedir el perdà ³n en cualquier momento. Tener en cuenta que para la visa de inmigrante las reglas son distintas y es lo que se explica ms abajo. En segundo lugar, lo mismo sucede para los migrantes que fueron removidos de Estados Unidos y que despuà ©s ingresaron ilegalmente o fueron agarrados cuando lo intentaban. En este caso tambià ©n aplica una prohibicià ³n permanente pero se puede pedir el perdà ³n en cualquier momento si lo que se desea solicitar a continuacià ³n es una visa no inmigrante. Un caso distinto es cuando se quiere solicitar la visa de inmigrante en los 2 supuestos anteriores y tambià ©n todos los dems casos de prohibicià ³n permanente ya es necesario poder demostrar ausencia de Estados Unidos por al menos 10 aà ±os antes de poder solicitar el perdà ³n.  ¿Cà ³mo se pide el perdà ³n I-212 para ingresar a EE.UU. despuà ©s de deportacià ³n? Por regla general el perdà ³n se pide llenando el formulario I-212, si bien hay unas pocas excepciones cuando se solicita una visa no inmigrante en determinados consulados de los Estados Unidos. Tambià ©n puede haber variaciones segà ºn el caso en lo referente a la cuota por aplicar y a la necesidad de aportar datos biomà ©tricos (huellas digitales y fotografà ­as). El formulario debe ir acompaà ±ado de documentos que se piden en las instrucciones del formulario y adems de aquellos  que sirvan de apoyo a la razà ³n por la que se solicita el perdà ³n. Entre ellos, destacan: Certificados de hijos, matrimonio, etc para probar existencia de familiares inmediatos en Estados UnidosDeclaraciones juradas de personas que afirmen que la persona que pide el perdà ³n es de buena moralreportes mà ©dicos o psicolà ³gicos para probar la dureza por la que pasan los familiares en Estados Unidos debido a la separacià ³n causada por la deportacià ³n.Reporte policial para demostrar un rà ©cord limpioEvidencia de rehabilitacià ³n si en el pasado se ha cometido algà ºn delitoCertificados de estudios o profesionales para probar capacidades de empleoReporte sobre la situacià ³n del paà ­s en la que se tiene que vivir si no se permite el regreso a Estados Unidos, etc. Si alguno de estos documentos est en un idioma distinto al inglà ©s, debe traducirse. Este listado debe entenderse como una sugerencia y deben incluirse todo lo que sirva para merecer el perdà ³n. El oficial de migracià ³n tiene libertad para decidir si aprueba la solicitud de perdà ³n. No existen reglas absolutas pero se considera que son factores a favor de su aprobacià ³n los siguientes: La existencia de familiares inmediatos en Estados Unidosla situacià ³n de dureza que puede ser causada al familiar en Estados Unidos, siempre que sea un ciudadano o un residente permanente legal. Incluso se puede considerar la dureza que se causa al empleador que se tenà ­a.El tiempo que se vivià ³ en Estados Unidos. Cuanto ms, mejor.El estatus migratorio que se tenà ­a antes de ser removido. Por ejemplo, si se tenà ­a la green card o una visa.La falta de rà ©cord delictivo o si se ha cometido uno, que no sea grave.En el caso de las expulsiones, cuenta a favor tener sà ³lo 1. Ms de una expulsià ³n aumenta las posibilidades de negacià ³n del perdà ³n.El ser considerado persona con buena moral. Aquà ­ podrà ­a ser un problema situaciones de falta de pago de pensià ³n alimenticia, etc.Si ya ha transcurrido mucho tiempo desde la expulsià ³n o deportacià ³n.La probabilidad de convertirse en residente permanente legal en el futuro. Es decir, se tiene una peticià ³n de resid encia realizada por un empleador o un familiar. Por el contrario, se consideran factores en contra a la hora de decidir sobre la aprobacià ³n del perdà ³n los siguientes: Ausencia de familiares en Estados Unidos o que los familiares no dependan de ningà ºn modo de la persona deportada.Historial delictivo, particularmente cuando se trata de un delito grave o agravado.Mal carcter moralVarias violaciones migratoriasMs de 1 intento de ingreso ilegal a Estado UnidosProbabilidad de convertirse en una carga pà ºblica o se es un peligro para la seguridad de Estados UnidosEnfermedad fà ­sica o mental, excepto si el à ºnico lugar donde puede recibir tratamiento es en Estados Unidos.  Si pasà ³ poco tiempo desde la deportacià ³n o expulsià ³n.Si en el pasado se trabajà ³ ilegalmente en los Estados Unidos. Tiempo de demora del perdà ³n I-212 y cuota por la peticià ³n En la actualidad, la totalidad de las solicitudes de perdà ³n I-212 se resuelven en menos de 180 dà ­as, es decir, seis meses.   En el momento en el que se escribe este artà ­culo, la cuota por aplicar es de $930, que debe pagarse al Servicio de Inmigracià ³n y Ciudadanà ­a (USCIS, por sus siglas en inglà ©s).  ¿Quà © pasa si se obtiene la aprobacià ³n del perdà ³n I-212? Ese perdà ³n es vlido de por vida, a menos que la agencia que lo concedià ³ lo revoque o que la persona cometa algà ºn delito o infraccià ³n migratoria que dà © lugar a una nueva deportacià ³n o expulsià ³n. Sin embargo, el perdà ³n no restaura nunca a la situacià ³n anterior al problema que dio lugar a la deportacià ³n o a la expulsià ³n. Por ejemplo, si se tuvo una visa de turista, no se recupera, o una tarjeta de residencia, etc. Adems, el tener el perdà ³n aprobado por sà ­ mismo no es suficiente para poder ingresar a Estados Unidos. Es decir, hay que solicitar una visa no inmigrante o tener una peticià ³n de visa inmigrante. Cualquiera de estas visas puede ser denegada si no se cumplen todos los requisitos para su aprobacià ³n. En el caso de las visas no inmigrante el problema puede surgir por no ser elegible o por no ser admisible. En el caso de las visas de inmigrante, sà ³lo por causa de inadmisibilidad. Precisamente para muchas causas de inadmisibilidad es posible pedir un perdà ³n. Para las causas que convierten a una persona en inelegible no es posible. Teniendo en cuenta esto, es importante leer el siguiente apartado.  ¿Es necesario pedir otros perdones conjuntamente con  I-212? Dependiendo del caso de cada uno, puede ser imprescindible presentar 1 o ms perdones conjuntamente con el I-212, ya que à ©ste solo sirve para la penalidad de la deportacià ³n o expulsià ³n. Por ejemplo, si se quiere es obtener una visa de inmigrante y hay otros problemas de inadmisibilidad como el castigo de los 3 à ³ 10 aà ±os, fraude de ley, comisià ³n de delito,enfermedad etc. entonces se necesita tambià ©n pedir el perdà ³n I-601, que tiene requisitos muy exigentes. Pero si se desea pedir una visa no inmigrante y hay ms causas de inadmisibilidad adems de la remocià ³n, tambià ©n se debe pedir otro tipo de perdà ³n.    Adems, es posible que el problema sea una causa de inadmisibilidad contra la cual no es posible pedir jams un perdà ³n, como por ejemplo tener en contra una declaracià ³n de haber solicitado previamente de forma frà ­vola la condicià ³n de asilo. Otro ejemplo es haber declarado falsamente ser ciudadano estadounidense para obtener un beneficio. Asimismo, no hay perdà ³n en los casos de delito de drogas cometidos despuà ©s de cumplir los 18 aà ±os, con la à ºnica excepcià ³n de posesià ³n de mariguana para uso propio o en los casos de matrimonio de conveniencia para obtener los papeles. Debido a que los casos de perdones son muy complicados es altamente aconsejable asesorarse por un buen abogado especialista en estos asuntos.  ¿Cul es la penalidad si se ingresa a Estados Unidos sin el perdà ³n I-212? Si se ingresa ilegalmente cuando est pendiente de cumplir el castigo por la expulsià ³n o la deportacià ³n automticamente se reinstaura la orden de deportacià ³n, de tal manera que si se es detenido o arrestado se proceder a su deportacià ³n sin pasar por Corte. Adems, es posible que apliquen multas y que se den cargos penales por los que puede haber pena de prisià ³n.Finalmente, cae sobre esa persona la prohibicià ³n permanente para regresar a Estados Unidos. Consejos legales Es muy importante entender las dificultades de obtener un perdà ³n y, honestamente, que la mayorà ­a que son aprobados han sido preparados por abogados migratorios reputados con experiencia en este tipo de casos. En esta pgina no se recomienda a ningà ºn letrado en particular, pero sà ­ se aconseja verificar con AILA, la asociacià ³n de abogados migratorios, para consultar sobre este tipo de casos. Este es un artà ­culo informativo. No es asesorà ­a legal.

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