Minerals That Live on the Earths Surface

Minerals That Live on the Earth's Surface Geologists know about thousands of different minerals locked in rocks, but when rocks are exposed at the Earths surface and fall victim to weathering, just a handful of minerals remain. They are the ingredients of sediment, which over geologic time returns to sedimentary rock. Where the Minerals Go When the mountains crumble to the sea, all of their rocks, whether igneous, sedimentary or metamorphic, break down. Physical or mechanical weathering reduces the rocks to small particles. These break down further by chemical weathering in water and oxygen. Only a few minerals can resist weathering indefinitely: zircon is one and native gold is another. Quartz resists for a very long time, which is why sand, being nearly pure quartz, is so persistent. Given enough time even quartz dissolves into silicic acid, H4SiO4. But most of the silicate minerals that compose rocks turn into solid residues after chemical weathering. These silicate residues are what make up the minerals of the Earths land surface. The olivine, pyroxenes, and amphiboles of igneous or metamorphic rocks react with water and leave behind rusty iron oxides, mostly the minerals goethite and hematite. These are important ingredients in soils, but theyre less common as solid minerals. They also add brown and red colors to sedimentary rocks. Feldspar, the most common silicate mineral group and the main home of aluminum in minerals, reacts with water too. Water pulls out silicon and other cations (CAT-eye-ons), or ions of positive charge, except for aluminum. The feldspar minerals thus turn into hydrated aluminosilicates that are clays. Amazing Clays Clay minerals are not much to look at, but life on Earth depends on them. At the microscopic level, clays are tiny flakes, like mica but infinitely smaller. At the molecular level, clay is a sandwich made of sheets of silica tetrahedra (SiO4) and sheets of magnesium or aluminum hydroxide (Mg(OH)2 and Al(OH)3). Some clays are a proper three-layer sandwich, a Mg/Al layer between two silica layers, while others are open-face sandwiches of two layers. What makes clays so valuable for life is that with their tiny particle size and open-faced construction, they have very large surface areas and can readily accept many substitute cations for their Si, Al and Mg atoms. Oxygen and hydrogen are available in abundance. From the viewpoint of living cells, clay minerals are like machine shops full of tools and power hookups. Indeed, even the building blocks of life- amino acids and other organic molecules- are enlivened by the energetic, catalytic environment of clays. The Makings of Clastic Rocks But back to sediments. With the overwhelming majority of surface minerals consisting of quartz, iron oxides and clay minerals, we have the ingredients of mud. Mud is the geological name of a sediment that is a mixture of particle sizes ranging from sand size (visible) to clay size (invisible), and the worlds rivers steadily deliver mud to the sea and to large lakes and inland basins. That is where the clastic sedimentary rocks are born, sandstone and mudstone and shale in all their variety. The Chemical Precipitates When the mountains are crumbling, much of their mineral content dissolves. This material reenters the rock cycle in other ways than clay, precipitating out of solution to form other surface minerals. Calcium is an important cation in igneous rock minerals, but it plays little part in the clay cycle. Instead, calcium remains in the water, where it affiliates with carbonate ion (CO3). When it becomes concentrated enough in seawater, calcium carbonate comes out of solution as calcite. Living organisms can extract it to build their calcite shells, which also become sediment. Where sulfur is abundant, calcium combines with it as the mineral gypsum. In other settings, sulfur captures dissolved iron and precipitates as pyrite. There is also sodium left over from the breakdown of the silicate minerals. That lingers in the sea until circumstances dry up the brine to a high concentration, when sodium joins chloride to yield solid salt or halite. And what of the dissolved silicic acid? That too is extracted by living organisms to form their microscopic silica skeletons. These rain down upon the seafloor and gradually become chert. Thus every part of the mountains finds a new place in the Earth.

A Good Teacher Should Care About Students

A good idea about teacher want them to students is learning use on lesson in the education for understanding and process for Texas Essential Knowledge and Skills (TEKS). It 's so important to know that is use preparation manual in public schools has development for Texas Examinations of Educator Standards (TExES). Because we can help to the student is learning communities for their teacher, staff and parents will discuss getting a meeting in schools. Make sure to have a relationship with parents†¦ A teacher in a general sense is someone that teaches to another person, and I think that teaching is one of the most needed professions there is. By teaching in schools and working with young kids, we are nurturing the minds of people who could have the cure for cancer or find new research about space. And with teaching there are many different philosophies about how teachers should act and interact with their students, but personally I lean more towards a Progressive view of teaching; I believe†¦ Teaching a specialism of any matter requires the teacher themselves to be competent and confident with their own abilities first. To be a competent carpenter requires lots of experience, dedication and time – without dedication, you will not put in the time and in turn not gain the experience. Hence dedication is a fundamental element, which is expressed to all the construction students at Harlow College, in order for them to succeed. Dedication goes hand in hand with motivation, motivation is developed†¦ Should students evaluate teachers? From year to year, educators are evaluated by grade level chairs and administration based on teaching skills and performance in the classroom. Depending the school, a recording of a single class period is used to evaluate a teacher. But what happens after the camera stops recording, and who is there to witness what happens. The answer is: the students. Despite feelings towards a teacher, based on emotion, students truly understand whether or not a teacher is†¦ Watching the videos on the learning to learn taught me a lot not only about what I was doing wrong but also how these things in the videos would be able to help me in my future classroom. Along with making myself more successful with some of the ideas and skills that were presented in the videos I learned that there are many things that I can teach my students, that I was never taught, that will help make them successful in their school and personal careers. One of the biggest aspects from the video†¦ Teachers should have the right to talk about their students When people have a rough day, and they just want to express their feelings. There are many ways for people to express their feelings, they express through words or action. But out of the two, words are the best way to express peoples ' feelings, because the other way might end up hurting someone or themselves. When I said the words the best way to express the feeling I’m not talking about cursing or yelling, I’m talking about talking†¦ Should Students Be Paid For Good Grades In School? Should students be paid for having good grades? This topic has some really strong arguments on either side. In this research paper I will list facts and argue both sides of this debate. Some people believe paying students for good grades is a bad idea, I personally believe students will strive to do better when they are paid for their work. Lots of schools are paying their students for getting good grades, and others are giving it a try. Why would†¦ In the present age, let the students evaluate their teachers has been widely used in the education sector. The students can judge their teachers whether are good or not. Even when the students are not satisfied with their teachers, they can vote to change the teachers. But, whether the students should evaluate their teachers has sparked spirited debate. Some people assert that students should evaluate their teachers, while many others argue that students should not do that. Then this easy will discuss†¦ The article â€Å"Being a Good Teacher of Black Students? White Teachers and Unintentional Racism,† Nora Hyland writes about the roles of 27 White teachers in the U.S. who identified as good teachers, but held racist views against their students. The school that these teachers taught at was in the Midwestern part of the country. They participated in the reproduction of racial inequality, which can exacerbate racist effects. This article explored the idea that teachers perpetuated the â€Å"status quo† of†¦ Should Students be paid for Good Grades? â€Å"There is no question that people will work hard for money at any age† (Peterson). There are programs around the country trying cash-reward programs out. For example, there are some schools in Washington D.C. trying these cash-reward programs out that give students cash awards for getting good grades and/or test scores. The schools think the incentives are working because test scores are boosting and students are working harder. The cash incentives prove†¦

British Airways Assignment Example | Topics and Well Written Essays - 1250 words

British Airways - Assignment Example British Airways is the largest airline in the United Kingdom. It has been the leader in innovations. Summerfield (2005) reports an innovative way that the airline allows its staff to be involved in the decision making process, â€Å"†¦British Airways’ learning division has used to promote organizational values is its ‘Owning Our Future’ program. We live in a modern society that is extremely dynamic especially due to technology. With the addition of the Internet and technology, the demands and challenges of the corporate world requires companies to develop product/process innovations and new production/technological developments. This is crucial in meeting the ever-changing demands of consumers. British Airways must also use innovative products and processes in order to deal with the negative aspects of business. An increase in income, quality of life, social factors, and mobility has increased the number of air passengers. Easier bookings and reservations, d iscounted pricing, and convenience are advantages that have been provided to consumers via technology and the Internet. With these advantages also come disadvantages in the current global marketplace. The cost of labour, maintenance, fuel, etc. also produces demands on British airways. The market is intensely competitive; hence, the airline must employ innovative tactics in order to manage the dynamic industry. It uses the Internet to sell tickets and to develop its marketing environment. British Airways also focused on their human resource and its relationship with employees. A psychological contract and reward system are two main targets. British Airways Waterside (1994-2002) reports that, "British Airways wanted to change the way they did business by introducing some new working practices. Among the things they set out to achieve were streamlined communications, minimizing paper and working more effectively as a team. In order to achieve these objectives a comprehensive educational program was designed. This British Airways 4 was initially

Concept Analysis Paper Anxiety Essay Example | Topics and Well Written Essays - 1000 words

Concept Analysis Paper Anxiety - Essay Example In other words, the paper would provide basis for research and management of anxiety related disorders and at the same time acting as an educational tool in the nursing field (Bouras & Holt, 2007). The purpose of this analysis was to demystify anxiety as a clinical condition. It will give a several insight into various features of the concept and examine the different consequences of this condition on patients. Anxiety and other related conditions are some of the most common mental reasons for seeking medical help today. A recent study statistics indicated that 25% of the global population have exhibited signs of anxiety. This therefore is a serious worrying trend for nursing practitioners and medical profession in general as it signifies serious medical health problem. Consequently, the need for concept analysis in anxiety would act as an important tool through which nurses can enhance their management skills as far as anxiety is concerned (Hayes and Strosahl, 2004) Definition of co ncept In common usage anxiety is a defense mechanism that triggers in the mind. This state when blown out of proportion can result to a serious psychological problem. It can also be defined as thoughts or worrying about the future events which can either be good or bad, meaning that a person who is worried about is future can suffer from anxiety. In nursing usage anxiety is defined as a combination of several biochemical changes in the body, the patient’s memory, social situation and personal history. It is difficult to concretely describe this condition as it as many causes and degrees of intensity. Sometimes doctors describe it as emotion or an affect depending on the person describing it, whether it’s an outside observer (affect) or the person having it (emotion) (Ohman, 2000). Defining characteristics Anxiety can present itself in many ways. some forms of anxiety expressed themselves mildly, whereas others severely. This form depends on the stage of development. Mi ld anxiety occurs when the condition is still in its infantry stages. In most cases, the severe anxiety occurs when the anxiety is not managed during its early stages of development. The characteristics exhibited by mild anxiety are distinct from those exhibited by severe anxiety. Mild anxiety, for instance expresses in form of panic attack. The person is mostly likely to show mild signs as perspiration, and chills (Twamas and Bangi, 2003) In some cases, a patient may experience symptoms such as obsessive compulsive disorder. Such conditions imply that the condition is in middle stages of progression. For those with post-traumatic stress as a form of anxiety then it’s characterized by lack of sleep (Barlow, 2002). Late stages of anxiety disorder differ depending on the type of anxiety the patient suffers from. Patients with panic disorder then late stages are characterized by behavioral and cognitive traits. In this stage the patient may dread death or go crazy. Those who hav e phobia may also express certain strange characteristics at the late stage e.g. stop doing any activity at all. (Craske and Barlow, 2003). Additionally, it worth noting that cases of anxiety can present in different forms. There are model cases, contrary cases and the borderline cases. Model case of anxiety is a case where the patient depicts most of the general features associated with anxiety. Borderline case of anxiety is a product of neurological and psychological disturbances. The term

Essay --

During a short conversation between the Duchess of Berwick, Lady Windermere, and Lord Darlington, author Oscar Wilde exposes such entertaining arrogance that the members of upper class society contain. All the blunt, cynical insults toward the lower class and sarcastic language between the character enlightens the arrogances of the characters and the cruel structure of their society considering the gaps between lower class and high class, along with men and women. The Duchess of Berwick is the first character that is introduced in the excerpt and immediately, there’s a clear idea of what kind of person she is. She has a very harsh conclusion of people below her, as seen; â€Å"I won’t let you know my daughter, you are far too wicked.† Although she knows Darlington well, she will not allow her daughter to think on her own and act on her own accord. It’s dominant that the Duchess values status along with wealth with the saying, â€Å"I don’t know what society is coming to. The most dreadful people seem to go everywhere.† She is very clearly seen to not like the lower class and thinks a bit...

European Decolonization

Decolonization in very simple terms refers to the collapse of colonialism and the subsequent establishment of authority in the countries being colonized (Duara, 2004). In Africa and other Asia countries which bore the brunt of the modern colonialism the word independence better captures the attainment of self rule immediately after the First and Second World War Generally, the word decolonization has come to be associated with the post-colonial period of the modern time and in particular immediately after World War One and Two.It is not a coincident that it is so but it is because of a combination of factors that triggered the two wars that ultimately made colonization untenable thereby triggering an accelerated process of decolonization (Duara, 2004). Here are some of these reasonsThe fact that majority of local leaders from most of these countries that were being ruled by foreign powers had already received western education from these countries that were colonizing them meant that there were an elite that was waiting in the wings to take over from these foreign leaders in the event that they succumbed to the popular call for their departure from the local population (Thomas, 2007. In fact most of these colonies already had a leadership that was demanding independence either through peaceful means or through violent means which at the time bordered on incitement of the masses.The kind of discontent that they created was at times too much for the colonizer who had already came out of a war (either First or Second World War) that had exhausted the finances that they would have used to maintain their grip on these colonies. Most other colonizer immediately after the war were unable to control these colonies (Thomas, 2007), this is better demonstrated by the Dutch request for assistance from the United Kingdom to build in Indonesia a bridgehead which it desperately needed but it could not build solely due to its financial situation after the World War One (Thomas , 2007).It is also due to financial constraint that were occasioned by high spending during the war that prompted countries like the United Kingdom to introduce a indirect rule policy which was comparably less expensive because of the way it used the local administrative units and heads instead of importing leaders from the United Kingdom. The economic models was fact changing making the maintenance of colonies less lucrative as compared to the period before the First World War (Koos, & Granata, 2008).Colonies were important and profitable before the WW1 because among other things they provided cheap labor & law materials, market for the manufactured products from the colonizing countries and sources of recruiting soldiers in times of wars, however all that had changed with the end of the war, there were no more war that looked imminent, and the sovereign of states had been given new meaning by the protagonists in the war which also benefited the occupied states by default. Lastly a nd mostly the economic model had drastically changed after the war making colonies generally unprofitable (Koos, & Granata, 2008).Debate was also going on in the mother countries on the merit of keeping the colonies and it seemed like those opposed to maintaining these colonies were winning the argument. Among the reason that they were advancing against keeping colonies was the human rights abuses that they were being accused of perpetuating in those colonies, opportunity cost of maintaining them among other convincing arguments against further maintenance of colonies (Thomas, 2007). In a sense the decision to let go the colonies enjoyed broad support within the mother countries.There was also the issue of the severe death toll that had been occasioned by both wars (WW1 & WW2). Each of the European country that was directly or indirectly involved in either of the wars had suffered a lot in form of soldiers and finances that not a single one was ready to commit some more resources in form of soldiers or funds to a cause like colonialism (Thomas, 2007). This was because each of those countries needed each and every penny that was available in rebuilding their economies that had been battled by the wars.For instance, a country like Germany was devastated in the First World War such that it could not continue with colonization. It had even been restrained from any military expedition outside its border not to mention the financial burden that it was to suffer in rebuilding some countries that it was accused of destroying (Thomas, 2007). In a nutshell both of these wars led to a lot of poverty on the mother nations of the colonizers and a state of bankruptcy on these countries thereby developing a state of extreme nationalism in most of them.There were even cases where colonies declared their independence as their colonizers concentrated on their individual problems, others sensing the weakened colonizers’ armies upped their military resistance against them and in the process forced these colonizer to allow the to govern themselves. References Duara, Prasenjit, (2004). Decolonization: Perspectives from Now And Then. Rutledge: New York. Thomas, Martin, (2007). European Decolonization. London: Ashgate. Koos, A. Cheryl, & Granata, A. Cora, (2008). The Human Tradition in Modern Europe, 1750- To the Present. New York: Rowman & Littlefield.

A Story About a Middle Aged Man, The Sportswriter by...

The sportswriter is a 1986 novel written by Richard Ford. The book revolves around a middle-aged man, Frank Bascombe, who shares his life problems through out the chapters. Among the many issues that Bascombe faced, divorce seems to come across as the main one as it has changed his life completely. Frank Bascombe seems that he is not able to move on from his ex, as he shows signs of regret and loneliness through out the book. Richard Ford begins the book with an introduction to Bascombe life but immediately shifts to the divorce and how it all happened. â€Å"It was stated in court by X’s sleaze-ball lawyer, Alan, that my travel was the cause of our trouble, especially after Ralph died. And though that isn’t technically true-it was a legal†¦show more content†¦I might not choose to get divorced† (Frank 4). And to insure that he regrets it he said â€Å" how could I ever loved her and let her go† when he talked about how beautiful she was (Frank11). Not only that he once tried to spend the night at X’s â€Å"Last night I hoped to stay for a drink, see the kids to bed, yak with X for half an hour, then end up, possibly, spending the night on the couch, something I hadn’t done in sometime (not, in fact, since I met Vicki) but felt fierce urge to do suddenly† (Frank 106) which shows his urge to relive the past. Within his present Frank blames anything negative on the divorce. He feels constant loneliness and he thinks that him being a divorced man plays a big role â€Å"Most people feel they have to make a choice and it is always easier to choose the wife, which is what my neighbors and friends mostly done† (Frank5). This led him to join a divorced men club because he thought he would be able to relate to other people in it, even though he didn’t care if they got along â€Å"†¦ there have been times when I couldn’t wait to get away and promised my self never to come back. But given our characters, I believe this is the most in friendship any of us can hope for. In any case the suburbs are not a place where friendships flourish. And even though I cannot say we like each other, I definitely can say that we don’t dislike each other, †¦Ã¢â‚¬  (Frank 79). InShow MoreRelatedInnovators Dna84615 Words   |  339 Pagesimpactful— if you can change your behaviors to improve your creative impact. In e Innovator’s DNA, authors Je Dyer, Hal Gregersen, and bestselling author Clayton M. Christensen ( e Innovator’s Dilemma, e Innovator’s Solution) build on what we know about disruptive innovation to show how individuals can develop the skills necessary to move progressively from idea to impact. By identifying behaviors of the world’s best innovators—from leaders at Amazon and Apple to those at Google, Skype, and