Learning Theory Application in Classroom Essays

Learning Theory Application in Classroom Essays Learning Theory Application in Classroom Paper Learning Theory Application in Classroom Paper PSYCHOLOGY OF TEACHING AND LEARNING (ED504) MODULE 2: MAIN ASSESSMENT QUESTION 2: Imagine you are on your break hour at school and you walked into the staff lounge to discover Piaget, Vygotsky, Erikson and Kohlberg are there. Their conversation is about learning and development. Write a paper tracing the conversation between each of these theorists. Be sure to accurately reflect the stance that each theorist would take. What would be the implications of any one of the theorist as a teacher and how could the theory be applied to the classroom? VTDI) This Paper is in Partial Completion Fulfilment of a POST-GRADUATE DIPLOMA IN EDUCATION AND TRAINING Date: October 13, 2011 Piaget, Vygotsky, Erikson and Kohlberg individually expounded their views on learning and development as outlined below. Piaget’s Cognitive Development Theory consists of four stages of intellectual development. Stage 1- Sensorimotor Stage. Birth to age 2. The child recognises self as agent of action and begins to act intentionally. The child realises that things continue to exist even when no longer present to the sense. Stage 2- Preoperational Stage Age 2-7. Learns to use language and to represent objects by images and words. Children learn through imitation and play during this stage. They begin to use reasoning; however it is mainly intuitive, instead of logical. Stage 3- Concrete Operational Stage Age 7- 11. Can thinks logically about objects and events. However this is confined to their level. Stage 4- Formal Operational Stage Age 11-adulthood. Can think logically about conceptual scheme and test hypotheses systematically. Erikson’s psychosocial theory of development shows that personality emerges from a series of conflicts. These conflicts arise at eight stages over the entire life cycle. These crises if resolve or unresolved can result in a greater sense of self or can lead to maladjustment respectively. Below is an outline of the steps and psychosocial interactions involved. Basic Trust vs. Mistrust (Birth to Year). Children develop a sense of trust when caregivers provide reliability, care, and affection. Autonomy vs. Shame (2-3 years). Children need to develop a sense of personal control over physical skills and a sense of independence. Initiative vs. Guilt (Preschooler , 4-5years). Children need to begin asserting control and power over the environment. Industry vs. Inferiority (School-Age Child, 6-11years). Children need to cope with new social and academic demands. Identity vs. Identity Confusion (Adolescent, 12-18 years). Teens need to develop a sense of self and personal identity. Intimacy vs. Isolation (Young Adult 18-35 years). Adults need to create or nurture things that will outlast them, often by having children or creating a positive change that benefits other people. Generativity vs. Stagnation (Middle-aged Adult, 35-65 years). At this stage the middle adult needs to work to establish stability and attempt to produce something that makes a difference to society. Integrity vs. Despair (Older Adult, over 65years). Older adults need to look back on life and feel a sense of fulfilment. Lawrence Kohlberg concludes that morality develops in stages. Kohlbergs six stages can be more generally grouped into three levels of two stages each which are outlined below. Level 1 (Pre-Conventional). This is generally found at the elementary school level. Stage 1: Obedience and punishment orientation. People behave according to socially acceptable norms. This obedience is forced by the threat or application of punishment. Stage 2: Self-interest orientation. This stage is characterized by a view that right behaviour means acting in ones own best interests Level 2 (Conventional). This is generally found in society. Stage 3: Interpersonal accord and compliance, is regarded as an attitude which seeks to do what will gain the approval of others. Stage 4: Authority and social-order maintaining orientation. This stage is one adjusted to abiding by the law and responding to the obligations of duty. Level 3 (Post-Conventional). It is felt that this is not reached by the majority of adults. Stage5. Social contract orientation. Is an understanding of social support and a genuine interest in the welfare of others. Stage 6. Universal ethical principles. Is based on respect for universal principle and the demands of individual conscience Vygotsky’s Social Development Theory Vygotsky focused on the connections between people and the sociocultural context in which they act and interact in shared experiences (Crawford, 1996). His major themes are outlined below: 1. Social interaction plays a fundamental role in the process of cognitive development.. He states: â€Å"Every function in the child’s cultural development appears twice: first, on the social level, and later, on the individual level; first, between people (interpsychological) and then inside the child (intrapsychological). † (Vygotsky, 1978). 2. Anyone who has a better understanding or a higher ability level than the learner, with respect to a particular task, process, or concept can serve as a guide to support cognitive growth. 3. According to Vygotsky, the Zone of Proximal Development is the distance between a student’s ability to perform a task under adult guidance and/or with peer collaboration and the student’s ability solving the problem independently. Vygotsky believes, learning occurred in this zone. The implications of Vygotsky’s theory for the teacher are that it promotes learning in the contexts where students play an active role in learning. Roles of the teacher and student are therefore shifted, as a teacher should collaborate with his or her students in order to help facilitate meaning development in students. Knowing both levels of Vygotsky’s zone of proximal development is useful for teachers, for these levels indicate where the child is at a given moment as well as where the child is going. According to Vygotsky, for the curriculum to be developmentally appropriate, the teacher must plan activities that encompass not only what children are capable of doing on their own but what they can learn with the help of others (Karpov Haywood, 1998). Vygotsky’s theory can be applied in the classroom. Vygotsky’s theory does not mean that anything can be taught to any child. Only instruction and activities that fall within the zone promote development. For example, if a child cannot identify the sounds in a word even after many prompts, the child may not benefit immediately from instruction in this skill. Practice of previously known skills and introduction of concepts that are too difficult and complex have little positive impact. Teachers can use information about both levels of Vygotsky’s zone of proximal development in organizing classroom activities in the following ways: Instruction can be planned to provide practice in the zone of proximal development for individual children or for groups of hildren. Scaffolding (Wood, Bruner, Ross, 1976) is a tactic for helping the child in his or her zone of proximal development in which the adult provides hints and prompts at different levels. † (Wood, Bruner, Ross, 1976). For example In a high school laboratory science class, a teacher might provide scaffolding by first giving students detailed guides to carrying out experiments, then giving them brief outlines that they might use to structure experiments, and finally asking them to set up experiments entirely on their own. Cooperative learning activities can be planned with groups of children at different levels who can help each other learn. I can be conclude therefore, that a careful application of the theories put forward by these researchers will greatly enhance learning in the classroom References Atherton J S (2011) Learning and Teaching; Piagets developmental theory [On-line: UK] retrieved 8 October 2011 from learningandteaching. info/learning/piaget. htm Crawford, K. (1996) Vygotskian approaches to human development in the information era. Educational Studies in Mathematics. (31) 43-62. Karpov, Y. , Haywood, H. C. (1998). Two ways to elaborate Vygotskys concept of mediation: Implications for instruction. American Psychologist, 53(1), 27-36. Learning Theories Knowledgebase (2011, October). Erikson’s Stages of Development at Learning-Theories. com. Retrieved October 8th, 2011 from learning-theories. com/eriksons-stages-of-development. html Learning Theories Knowledgebase (2011, October). Social Development Theory (Vygotsky) at Learning-Theories. com. Retrieved October 8th, 2011 from learning-theories. com/vygotskys-social-learning-theory. html Robert N. Barger, Ph. D. (2000) A Summary of Lawerence Kohlbergs, Stages of Moral Development retrieved October 7th, 2011 from csudh. edu/dearhabermas/kohlberg01bk. htm . Vygotsky, L. S. (1978). Mind and society: The development of higher mental processes. Cambridge, MA: Harvard University Press. Wood, D. J. , Bruner, J. S. , Ross, G. (1976). The role of tutoring in problem solving. Journal of Child Psychiatry and Psychology, 17(2), 89-100

Learning Theory Application in Classroom Essays

Learning Theory Application in Classroom Essays Learning Theory Application in Classroom Paper Learning Theory Application in Classroom Paper PSYCHOLOGY OF TEACHING AND LEARNING (ED504) MODULE 2: MAIN ASSESSMENT QUESTION 2: Imagine you are on your break hour at school and you walked into the staff lounge to discover Piaget, Vygotsky, Erikson and Kohlberg are there. Their conversation is about learning and development. Write a paper tracing the conversation between each of these theorists. Be sure to accurately reflect the stance that each theorist would take. What would be the implications of any one of the theorist as a teacher and how could the theory be applied to the classroom? VTDI) This Paper is in Partial Completion Fulfilment of a POST-GRADUATE DIPLOMA IN EDUCATION AND TRAINING Date: October 13, 2011 Piaget, Vygotsky, Erikson and Kohlberg individually expounded their views on learning and development as outlined below. Piaget’s Cognitive Development Theory consists of four stages of intellectual development. Stage 1- Sensorimotor Stage. Birth to age 2. The child recognises self as agent of action and begins to act intentionally. The child realises that things continue to exist even when no longer present to the sense. Stage 2- Preoperational Stage Age 2-7. Learns to use language and to represent objects by images and words. Children learn through imitation and play during this stage. They begin to use reasoning; however it is mainly intuitive, instead of logical. Stage 3- Concrete Operational Stage Age 7- 11. Can thinks logically about objects and events. However this is confined to their level. Stage 4- Formal Operational Stage Age 11-adulthood. Can think logically about conceptual scheme and test hypotheses systematically. Erikson’s psychosocial theory of development shows that personality emerges from a series of conflicts. These conflicts arise at eight stages over the entire life cycle. These crises if resolve or unresolved can result in a greater sense of self or can lead to maladjustment respectively. Below is an outline of the steps and psychosocial interactions involved. Basic Trust vs. Mistrust (Birth to Year). Children develop a sense of trust when caregivers provide reliability, care, and affection. Autonomy vs. Shame (2-3 years). Children need to develop a sense of personal control over physical skills and a sense of independence. Initiative vs. Guilt (Preschooler , 4-5years). Children need to begin asserting control and power over the environment. Industry vs. Inferiority (School-Age Child, 6-11years). Children need to cope with new social and academic demands. Identity vs. Identity Confusion (Adolescent, 12-18 years). Teens need to develop a sense of self and personal identity. Intimacy vs. Isolation (Young Adult 18-35 years). Adults need to create or nurture things that will outlast them, often by having children or creating a positive change that benefits other people. Generativity vs. Stagnation (Middle-aged Adult, 35-65 years). At this stage the middle adult needs to work to establish stability and attempt to produce something that makes a difference to society. Integrity vs. Despair (Older Adult, over 65years). Older adults need to look back on life and feel a sense of fulfilment. Lawrence Kohlberg concludes that morality develops in stages. Kohlbergs six stages can be more generally grouped into three levels of two stages each which are outlined below. Level 1 (Pre-Conventional). This is generally found at the elementary school level. Stage 1: Obedience and punishment orientation. People behave according to socially acceptable norms. This obedience is forced by the threat or application of punishment. Stage 2: Self-interest orientation. This stage is characterized by a view that right behaviour means acting in ones own best interests Level 2 (Conventional). This is generally found in society. Stage 3: Interpersonal accord and compliance, is regarded as an attitude which seeks to do what will gain the approval of others. Stage 4: Authority and social-order maintaining orientation. This stage is one adjusted to abiding by the law and responding to the obligations of duty. Level 3 (Post-Conventional). It is felt that this is not reached by the majority of adults. Stage5. Social contract orientation. Is an understanding of social support and a genuine interest in the welfare of others. Stage 6. Universal ethical principles. Is based on respect for universal principle and the demands of individual conscience Vygotsky’s Social Development Theory Vygotsky focused on the connections between people and the sociocultural context in which they act and interact in shared experiences (Crawford, 1996). His major themes are outlined below: 1. Social interaction plays a fundamental role in the process of cognitive development.. He states: â€Å"Every function in the child’s cultural development appears twice: first, on the social level, and later, on the individual level; first, between people (interpsychological) and then inside the child (intrapsychological). † (Vygotsky, 1978). 2. Anyone who has a better understanding or a higher ability level than the learner, with respect to a particular task, process, or concept can serve as a guide to support cognitive growth. 3. According to Vygotsky, the Zone of Proximal Development is the distance between a student’s ability to perform a task under adult guidance and/or with peer collaboration and the student’s ability solving the problem independently. Vygotsky believes, learning occurred in this zone. The implications of Vygotsky’s theory for the teacher are that it promotes learning in the contexts where students play an active role in learning. Roles of the teacher and student are therefore shifted, as a teacher should collaborate with his or her students in order to help facilitate meaning development in students. Knowing both levels of Vygotsky’s zone of proximal development is useful for teachers, for these levels indicate where the child is at a given moment as well as where the child is going. According to Vygotsky, for the curriculum to be developmentally appropriate, the teacher must plan activities that encompass not only what children are capable of doing on their own but what they can learn with the help of others (Karpov Haywood, 1998). Vygotsky’s theory can be applied in the classroom. Vygotsky’s theory does not mean that anything can be taught to any child. Only instruction and activities that fall within the zone promote development. For example, if a child cannot identify the sounds in a word even after many prompts, the child may not benefit immediately from instruction in this skill. Practice of previously known skills and introduction of concepts that are too difficult and complex have little positive impact. Teachers can use information about both levels of Vygotsky’s zone of proximal development in organizing classroom activities in the following ways: Instruction can be planned to provide practice in the zone of proximal development for individual children or for groups of hildren. Scaffolding (Wood, Bruner, Ross, 1976) is a tactic for helping the child in his or her zone of proximal development in which the adult provides hints and prompts at different levels. † (Wood, Bruner, Ross, 1976). For example In a high school laboratory science class, a teacher might provide scaffolding by first giving students detailed guides to carrying out experiments, then giving them brief outlines that they might use to structure experiments, and finally asking them to set up experiments entirely on their own. Cooperative learning activities can be planned with groups of children at different levels who can help each other learn. I can be conclude therefore, that a careful application of the theories put forward by these researchers will greatly enhance learning in the classroom References Atherton J S (2011) Learning and Teaching; Piagets developmental theory [On-line: UK] retrieved 8 October 2011 from learningandteaching. info/learning/piaget. htm Crawford, K. (1996) Vygotskian approaches to human development in the information era. Educational Studies in Mathematics. (31) 43-62. Karpov, Y. , Haywood, H. C. (1998). Two ways to elaborate Vygotskys concept of mediation: Implications for instruction. American Psychologist, 53(1), 27-36. Learning Theories Knowledgebase (2011, October). Erikson’s Stages of Development at Learning-Theories. com. Retrieved October 8th, 2011 from learning-theories. com/eriksons-stages-of-development. html Learning Theories Knowledgebase (2011, October). Social Development Theory (Vygotsky) at Learning-Theories. com. Retrieved October 8th, 2011 from learning-theories. com/vygotskys-social-learning-theory. html Robert N. Barger, Ph. D. (2000) A Summary of Lawerence Kohlbergs, Stages of Moral Development retrieved October 7th, 2011 from csudh. edu/dearhabermas/kohlberg01bk. htm . Vygotsky, L. S. (1978). Mind and society: The development of higher mental processes. Cambridge, MA: Harvard University Press. Wood, D. J. , Bruner, J. S. , Ross, G. (1976). The role of tutoring in problem solving. Journal of Child Psychiatry and Psychology, 17(2), 89-100

Learning Theory Application in Classroom Essays

Learning Theory Application in Classroom Essays Learning Theory Application in Classroom Paper Learning Theory Application in Classroom Paper PSYCHOLOGY OF TEACHING AND LEARNING (ED504) MODULE 2: MAIN ASSESSMENT QUESTION 2: Imagine you are on your break hour at school and you walked into the staff lounge to discover Piaget, Vygotsky, Erikson and Kohlberg are there. Their conversation is about learning and development. Write a paper tracing the conversation between each of these theorists. Be sure to accurately reflect the stance that each theorist would take. What would be the implications of any one of the theorist as a teacher and how could the theory be applied to the classroom? VTDI) This Paper is in Partial Completion Fulfilment of a POST-GRADUATE DIPLOMA IN EDUCATION AND TRAINING Date: October 13, 2011 Piaget, Vygotsky, Erikson and Kohlberg individually expounded their views on learning and development as outlined below. Piaget’s Cognitive Development Theory consists of four stages of intellectual development. Stage 1- Sensorimotor Stage. Birth to age 2. The child recognises self as agent of action and begins to act intentionally. The child realises that things continue to exist even when no longer present to the sense. Stage 2- Preoperational Stage Age 2-7. Learns to use language and to represent objects by images and words. Children learn through imitation and play during this stage. They begin to use reasoning; however it is mainly intuitive, instead of logical. Stage 3- Concrete Operational Stage Age 7- 11. Can thinks logically about objects and events. However this is confined to their level. Stage 4- Formal Operational Stage Age 11-adulthood. Can think logically about conceptual scheme and test hypotheses systematically. Erikson’s psychosocial theory of development shows that personality emerges from a series of conflicts. These conflicts arise at eight stages over the entire life cycle. These crises if resolve or unresolved can result in a greater sense of self or can lead to maladjustment respectively. Below is an outline of the steps and psychosocial interactions involved. Basic Trust vs. Mistrust (Birth to Year). Children develop a sense of trust when caregivers provide reliability, care, and affection. Autonomy vs. Shame (2-3 years). Children need to develop a sense of personal control over physical skills and a sense of independence. Initiative vs. Guilt (Preschooler , 4-5years). Children need to begin asserting control and power over the environment. Industry vs. Inferiority (School-Age Child, 6-11years). Children need to cope with new social and academic demands. Identity vs. Identity Confusion (Adolescent, 12-18 years). Teens need to develop a sense of self and personal identity. Intimacy vs. Isolation (Young Adult 18-35 years). Adults need to create or nurture things that will outlast them, often by having children or creating a positive change that benefits other people. Generativity vs. Stagnation (Middle-aged Adult, 35-65 years). At this stage the middle adult needs to work to establish stability and attempt to produce something that makes a difference to society. Integrity vs. Despair (Older Adult, over 65years). Older adults need to look back on life and feel a sense of fulfilment. Lawrence Kohlberg concludes that morality develops in stages. Kohlbergs six stages can be more generally grouped into three levels of two stages each which are outlined below. Level 1 (Pre-Conventional). This is generally found at the elementary school level. Stage 1: Obedience and punishment orientation. People behave according to socially acceptable norms. This obedience is forced by the threat or application of punishment. Stage 2: Self-interest orientation. This stage is characterized by a view that right behaviour means acting in ones own best interests Level 2 (Conventional). This is generally found in society. Stage 3: Interpersonal accord and compliance, is regarded as an attitude which seeks to do what will gain the approval of others. Stage 4: Authority and social-order maintaining orientation. This stage is one adjusted to abiding by the law and responding to the obligations of duty. Level 3 (Post-Conventional). It is felt that this is not reached by the majority of adults. Stage5. Social contract orientation. Is an understanding of social support and a genuine interest in the welfare of others. Stage 6. Universal ethical principles. Is based on respect for universal principle and the demands of individual conscience Vygotsky’s Social Development Theory Vygotsky focused on the connections between people and the sociocultural context in which they act and interact in shared experiences (Crawford, 1996). His major themes are outlined below: 1. Social interaction plays a fundamental role in the process of cognitive development.. He states: â€Å"Every function in the child’s cultural development appears twice: first, on the social level, and later, on the individual level; first, between people (interpsychological) and then inside the child (intrapsychological). † (Vygotsky, 1978). 2. Anyone who has a better understanding or a higher ability level than the learner, with respect to a particular task, process, or concept can serve as a guide to support cognitive growth. 3. According to Vygotsky, the Zone of Proximal Development is the distance between a student’s ability to perform a task under adult guidance and/or with peer collaboration and the student’s ability solving the problem independently. Vygotsky believes, learning occurred in this zone. The implications of Vygotsky’s theory for the teacher are that it promotes learning in the contexts where students play an active role in learning. Roles of the teacher and student are therefore shifted, as a teacher should collaborate with his or her students in order to help facilitate meaning development in students. Knowing both levels of Vygotsky’s zone of proximal development is useful for teachers, for these levels indicate where the child is at a given moment as well as where the child is going. According to Vygotsky, for the curriculum to be developmentally appropriate, the teacher must plan activities that encompass not only what children are capable of doing on their own but what they can learn with the help of others (Karpov Haywood, 1998). Vygotsky’s theory can be applied in the classroom. Vygotsky’s theory does not mean that anything can be taught to any child. Only instruction and activities that fall within the zone promote development. For example, if a child cannot identify the sounds in a word even after many prompts, the child may not benefit immediately from instruction in this skill. Practice of previously known skills and introduction of concepts that are too difficult and complex have little positive impact. Teachers can use information about both levels of Vygotsky’s zone of proximal development in organizing classroom activities in the following ways: Instruction can be planned to provide practice in the zone of proximal development for individual children or for groups of hildren. Scaffolding (Wood, Bruner, Ross, 1976) is a tactic for helping the child in his or her zone of proximal development in which the adult provides hints and prompts at different levels. † (Wood, Bruner, Ross, 1976). For example In a high school laboratory science class, a teacher might provide scaffolding by first giving students detailed guides to carrying out experiments, then giving them brief outlines that they might use to structure experiments, and finally asking them to set up experiments entirely on their own. Cooperative learning activities can be planned with groups of children at different levels who can help each other learn. I can be conclude therefore, that a careful application of the theories put forward by these researchers will greatly enhance learning in the classroom References Atherton J S (2011) Learning and Teaching; Piagets developmental theory [On-line: UK] retrieved 8 October 2011 from learningandteaching. info/learning/piaget. htm Crawford, K. (1996) Vygotskian approaches to human development in the information era. Educational Studies in Mathematics. (31) 43-62. Karpov, Y. , Haywood, H. C. (1998). Two ways to elaborate Vygotskys concept of mediation: Implications for instruction. American Psychologist, 53(1), 27-36. Learning Theories Knowledgebase (2011, October). Erikson’s Stages of Development at Learning-Theories. com. Retrieved October 8th, 2011 from learning-theories. com/eriksons-stages-of-development. html Learning Theories Knowledgebase (2011, October). Social Development Theory (Vygotsky) at Learning-Theories. com. Retrieved October 8th, 2011 from learning-theories. com/vygotskys-social-learning-theory. html Robert N. Barger, Ph. D. (2000) A Summary of Lawerence Kohlbergs, Stages of Moral Development retrieved October 7th, 2011 from csudh. edu/dearhabermas/kohlberg01bk. htm . Vygotsky, L. S. (1978). Mind and society: The development of higher mental processes. Cambridge, MA: Harvard University Press. Wood, D. J. , Bruner, J. S. , Ross, G. (1976). The role of tutoring in problem solving. Journal of Child Psychiatry and Psychology, 17(2), 89-100

How to Plant the Leyland Cypress Tree in Your Landscape

How to Plant the Leyland Cypress Tree in Your Landscape A rapidly-growing evergreen when young, Leyland Cypress will easily grow three to four feet per year, even on poor soils, and can ultimately attain a height of some 50 feet. The tree forms a dense, oval or pyramidal outline when left unpruned, but the graceful, slightly pendulous branches will tolerate severe trimming to create a formal hedge, screen or windbreak. The tree quickly outgrows its space in small landscapes and is too big for most residential landscapes unless regularly trimmed. Unusually, shallow roots of the species can give in wet soil to topple large trees. Uses Scientific name: x Cupressocyparis leylandiiPronunciation: x koo-press-so-SIP-air-iss lay-LAN-dee-eyeCommon name: Leyland CypressFamily: CupressaceaeUSDA hardiness zones: 6 through 10AOrigin: not native to North AmericaUses: hedge; recommended for buffer strips around parking lots or for median strip plantings in the highway; screen; specimen; Christmas treeAvailability: generally available in many areas within its hardiness range Form Height: 35 to 50 feetSpread: 15 to 25 feetCrown uniformity: symmetrical canopy with a regular (or smooth) outline  and individuals have more or less identical crown formsCrown shape: columnar; oval; pyramidalCrown density: denseGrowth rate: fastTexture: fine Foliage Leaf arrangement: opposite/suboppositeLeaf type: simpleLeaf margin: entireLeaf shape: scale-likeLeaf venation: none, or difficult to seeLeaf type and persistence: evergreenLeaf-blade length: less than 2 inchesLeaf color: blue or blue-green; greenFall color: no fall color changeFall characteristic: not showy Structure Trunk/bark/branches: grow mostly upright and will not droop; not particularly showy; should be grown with a single leader; no thornsPruning requirement: needs little pruning to develop a strong structureBreakage: resistantCurrent year twig color: green Planting Leyland cypress trees enjoy both part shade/part sun and full sun- the tree has very forgiving light requirements. The cypress can be planted in many soils. The tree tolerates clay, loam, sand and will grow in both acidic and alkaline soils but still needs to be planted in a well-drained site. It tolerates drought conditions and is salt tolerant. When planting Leyland cypress, remember the trees mature size and fast growth rate. Planting a cypress too close is not recommended. You will be tempted to plant the seedlings too close but ten-foot spacings should be a minimum in most landscapes. Pruning Leyland Cypress is a fast grower and, if not pruned early, can get out of hand as a hedge. In the first year trim back long side shoots at the start of the growing season. Trim sides lightly in late July. The sides can be trimmed the following to year encourage denser growth. Continue to trim the sides each year leaving the leading shoot untouched until the desired height is reached. Topping and regular trimming of the sides should prevent trees from becoming increasingly large. Seiridium Canker Seiridium canker disease, also called coryneum canker is a slow-spreading fungal disease of Leyland cypress. It disfigures and damages trees, particularly in hedges and screens that are heavily pruned. Seiridium canker is usually localized on individual limbs. The limb is usually dry, dead, often discolored, with a sunken or cracked area surrounded by living tissue. You should always destroy diseased plant parts and try to avoid physical damage to plants. Sanitize pruning tools between each cut by dipping in rubbing alcohol or in a solution of chlorine bleach and water. Chemical control has proven to be difficult. Horticulturist Commentary Dr. Mike Dirr says about Leyland Cypress: ...it should be restrained at an early age before pruning becomes impossible. Additional Information Leyland Cypress grows in full sun on a wide range of soils, from acid to alkaline, but looks its best on moderately fertile soil with sufficient moisture. It is surprisingly tolerant of severe pruning, recovering nicely from even severe topping (although this is not recommended), even when half the top is removed. It grows well in clay soil and tolerates poor drainage for a short period of time. It also is very tolerant of salt spray. Some available cultivars include: ‘Castlewellan’, a more compact form with gold-tipped leaves, excellent for hedges in cool climates; ‘Leighton Green’, dense branching with dark green foliage, columnar form; ‘Haggerston Gray’, loose branches, columnarpyramidal, upturned at ends, sage-green color; ‘Naylor’s Blue’, blue-grey foliage, columnar form; ‘Silver Dust’, wide-spreading form with blue-green foliage marked with white variegations. Propagation is by cuttings from side growths.

Organization Behavior - 3 Essay Example | Topics and Well Written Essays - 1250 words

Organization Behavior - 3 - Essay Example An open system focuses on the throughputs that are taken from the environment. The throughputs are then given back to the environment and in this way; the open system completes its cycle. The open system perspective plays a key role in determining the organizational effectiveness in a sense that the system receives inputs from the environment and its outputs are accepted from the external environment. The open system exchanges the feedback with the external environment of the organization, which helps the organization determine its effectiveness. The feedback, which is exchanged with the external environments, is analyzed in order to determine the changes that are needed to achieve the organizational goals and objectives. Therefore, we can say that the open system perspective is one of the integral perspectives of an organizational effectiveness because it helps the organization achieve its goals in a successful manner. There are five basic types of behaviors included in the organizational behavior literature. The types of behaviors include task performance, organizational citizenship, counterproductive work behaviors, joining and staying with the organization, and maintaining work attendance. All these types of behaviors are of significant importance for the success of an organization. Task performance refers to those goal-directed behaviors that are under the control of individuals. This type of behavior is used to transform the raw materials into the finished goods. If we take example of employees, we can say that employees usually have more than one dimensions for performance. In task performance behavior, all of the dimensions are analyzed in order to evaluate the employee’s performance. In my view, task performance behavior is one of the most significant behaviors because this behavior is directly related to the performance of employees. Organizational citizenship behavior

A Tour to History Colorado Center Research Paper

A Tour to History Colorado Center - Research Paper Example From this study it is clear that  Ancient Puebbloan people domesticated turkey for a number of reasons. One of the reasons was it was rich source of protein that could replaces the decreasing number of deers who also proved very difficult to hunt and they were also over hunted hence their reduction in population. Archeologists have found remains of turkey in pens together with their gizzards stones, eggshell in large number and these have been collected and brought into o the center.   Within the center you would come across heals damages of turkey preserved in the center and this also support mass hunting of turkey by ancient Puebloan people.  This discussion stresses that  various artifacts such as needles, neck less which shows how creative the first Puebloan of Mesa Verde area in Colorado was in designing their tools from hallow bones which they used in making blankets from turkey feathers. Dust Bowl. This shows how man has learnt how to survive in very challenging enviro nment. The tour to the center also reflected how economical and less demanding it was to keep turkey because they consume approximately half a pound of maize grains daily and some small insects which could be found in the natural environment. This encounter therefore would be very useful to entrepreneurs who don’t have huge capital but are interesting in engaging in farming activities.  Certain cultural orientations may be grounded on straight traditions.

Describe The Four Types Of Solid Structures Environmental Sciences Essay

Describe The Four Types Of Solid Structures Environmental Sciences Essay There are three forms of substances exist: liquid, solid and gas in which solid is one of the major state of matter. The solid structure bonds the atoms together by different chemical physical attraction. Chemical bonds are the result of interactions of electrons by various forces of attraction. This attraction can hold atoms together in a stable arrangement. Atoms may transfer or share atoms to form molecules and compounds. When atoms bond together by chemical bonds, they will become more stable. Different types of chemical bonds determine solids properties, such as melting point, conductivity and solubility (Lister and Renshaw, 2000). Electron transferring form ionic bonds while electron sharing and joining molecules form covalent bonds. Linus Pauling came up with a scale, a value for each element called the electronegativity (E.N.) value. Each element has different desire wanting, ability to attract electrons. The strong electron attractions were given high values and some atoms have very low ability to attract were given a low value. These values are relative-comparison values and have no units. The value of difference electronegativity between two atoms less than 1.8 are defined as covalent bonds while the value of difference electronegativity between two atoms more than 2.0 are defined as ionic bonds. This essay will describe four types of solid structures: ionic and metallic which contains of unit cell, giant covalent which is held by network and simple molecular which are small molecules with weak forces of attraction. Ionic Structure First of all, ionic bonding commonly exists in crystal solid structures. Ionic bonding electrons are transferred from mental atoms to non-metal atoms which result in each ion obtaining a full outer shell of electrons to become stable. Commonly, metals form cation by losing valence electrons while non-metals form anions by gaining valence electrons. Sodium chloride (NaCl) is a well known ionic compound. Sodium loses one electron from its outer shell while the chlorine gains one electron to fill its outer most shell. When sodium (Na+) ions bond with chloride (Cl-) ions they form common table salt, sodium chloride (NaCl) (Lister and Renshaw, 2000). In addition, Sodium chloride (NaCl) is made up of giant lattice of ions. There are a large amount of sodium ions and chloride ions packed together which depends on how big the crystal is. Figure 1 (Adapted Steinberg, 2000) shows how does a bit of sodium chloride lattice arranged. Figure 1: Ionic Bonding in Sodium Chloride (Adapted from Steinberg, 2000) Each sodium ion is at a centre surrounded by 6 chloride anions. Each chloride ion is also in the centre, it is also surrounded by 6 sodium cations. So sodium chloride is described 6 co-ordinated. The pattern in this way will be repeated countless times in sodium chloride crystal and ensure the maximum stability in sodium chloride. Because when each ion is touched by 6 opposite charged ions, there is more attraction between the ions which makes the structure more stable (Clark, 2010). Figure 2 (Adapted from Clark, 2010) shows clearly the unit cell of sodium chloride. Figure 2: Unit Cell of Sodium Chloride (Adapted from Clark, 2010) Commonly, the atoms arrange in a regular way, but sometimes this is not the case. All metal atoms consist of a lot of crystal grains which are regions of regularity. At grains boundaries atoms become inconformity. There are various properties in ionic compounds. Firstly, ionic compounds have a high melting point and boiling point. There are strong attractions between the positive and negative ions which take a lot of energy to overcome them. Secondly, one of the main properties of ionic compounds is they conduct electricity when molten, because when the compound is in the liquid state, the ions can carry the charge freely. Ionic compounds are brittle which resulting from an applied stress. The ions will be moved sufficiently to make contact between ions. Ions of the same charged are brought side-by-side leading to repulsion forces within the crystal. Many ionic compounds dissolve in the water. Water molecules have unbonded electrons, called lone pairs. They attract positive ions and negative ions in the compounds form dative bonds and polar water forms electrostatic attractions between the ions. Water molecules also produce energy by hydration to break up the lattice and reduce their attractio n (Clark, 2010). Covalent bonds Atoms sharing electrons form covalent bonds which the electronegativity difference between two atoms are less than 1.8. Giant Covalent Structure In giant covalent structures, all atoms are bonded together by covalent bonds which directly have an influence on specific atoms in a regular extended network. The electrostatics forces hold other structures together to act equally in all directions. Diamond is best example of giant covalent structure (Lister and Renshaw, 2000). Diamond has a tetrahedral shape in three-dimensions, with four covalent bonds from each carbon atom. According to VSEPR theory which can explain the levels of repulsion between chemical bonds (Lane, 2009), to reduce the repulsion four pairs of covalent bonds form and covalent bonds repel each other equally. There are no intermolecular forces of attraction only, between the carbon atoms. Figure 4 (Adapted from Chemcases, 2010) shows the structure of diamond Figure 4 shows the structure of diamond (Adapted from Chemcases, 2010). Diamond is well known as the hardness natural substance, and results from four strong covalent bonds giving diamond a strong rigid extended and continuous structure, so diamond just can be cut by other diamond. In addition, diamond has a very high melting point of around 4000K, because to break up the four strong covalent bonds requires a lot of energy. Next, the electrons which are held tightly are not free to move, resulting in the diamond having neither conduct electricity nor heat. At Last, diamond is insoluble in water because the covalent bonds are much stronger than the attraction of water molecules (Clark, 2000). Simple Molecular Structure The simple molecular substances are non-metal compounds which are made up of atoms by strong covalently bond and relatively weak intermolecular forces. Water is taken as a typical type of the simple molecular structure (Lower, 2010). In water, each hydrogen atom is bound to the central oxygen atom by a pair of sharing electrons. Oxygen has four free electrons in its outer second level to form two lone pairs to reduce the repulsions between clouds of negative charge, leaving two of the outer electrons shared with hydrogen to form covalent bonds. This rule leads to a tetrahedral structure in which the angle between electron pairs is 104.5Â °. In addition, water molecules forms hydrogen bonding. Oxygen likes electrons more than hydrogen and electrons spend more time near the oxygen, resulting in oxygen is part negative charge while the hydrogen is positive charge. Electrons are distributed leading to water form a negative structure of hydrogen bonds. Dipole-dipole attractions occur between two water molecules, due to its polar nature (Lane, 2009). Figure 5 (Adapted from Google, 2010) shows the structure of water molecule. Figure 5: Hydrogen Bonding Between Water Molecules (Adapted from Google, 2010) As the weak forces exist in simple molecular substances, they are not very dense or strong nor solid resulting in it having a low melting point and boiling point. Simple molecular substances can easily become gas or liquid. There are no ions existing in these substances, so they are insoluble in the water and can not conduct electricity (Lower, 2010). Metallic Structure Metals are giant structures which hold the atoms together by metallic bonding transferring the electrons. All elements of metal can easily lose electrons forming positive ions which are in a freely moving sea and electrons. How many electrons have been lost by each metal determine the number of electrons in the sea (Lister and Renshaw, 2000). Most ions in metals pack as close as they can. However, sodium in Group one is more open and less dense and forms a unit called the body-centred cubic (BCC) structure which is a common packing geometry for some metals. This structure is not a close-packed arrangement, just 68% of the space being filled (Lister and Renshaw, 2000). There is an atom located in the centre of a cube which is surrounded by eight other spheres. Figure 3 (Adapted from Clark, 2007) shows the structure of sodium: a coordination of eight and a unit cell containing two atoms. Figure 3: The Structure of Sodium (Adapted from Clark, 2007) There are several properties about metals. Most of metals tend to have a high melting point and boiling point due to the strength of the metallic bonding. The strength of metallic bonding is not only different from metal to metal, but also depends on the number of electrons which each atom can delocalise in the sea of electrons and by the packing. Transition metals have a high melting point and boiling point because they form a unit called hexagonal close packing. Group one such as Sodium is an exception and has a low melting point and boiling point, because it only has one electron to contribute to the bond and it is 8 co-ordinated which can not form strong enough bonds as other metals. Secondly, metals are good conductors of electricity. The electrons in the sea are free to move throughout the structure even cross the grain boundaries. The metallic bonding still exists as long as atoms are touching each other. In addition, these electrons are also responsible for the high thermal c onductivities of metals. Electrons of the metals can pick up heat energy which is transferred to the rest of metal by moving electrons (Clark, 2007). In conclusion, electrons are transferred forming ionic bonding in ionic crystal solid structure. As giant lattice of ions exist in ionic solids, the ionic solids not only have a high melting point and boiling point but also conduct electricity well. Metal hold the atoms together by metallic bonding which determines that metal compounds have a high melting point and boiling point and are good conductors of electricity and heat. Although both of giant covalent structures and simple molecular structures have electron sharing covalent bonding, they have different properties. Strong covalent network bonding is involved in giant covalent structures holding the atoms together, with the result that giant covalent compounds are easily to melt and can not conduct electricity. In contrast, there are some weak intramolecular forces in simple molecular structures which lead to this kind of structure having a low melting point and boiling point, and unable to conduct electricity.