Sunday, December 29, 2019

A Schools Website Makes an Important First Impression

Before a parent or student physically sets a foot into a school building,  there is an opportunity for  a virtual visit. That virtual visit takes place through a schools website, and the information that is available on this website makes an important first impression. That first impression is an opportunity to highlight the schools best qualities and to show how welcoming the school community is to all stakeholders-parents, students, educators, and community members. Once this positive impression is made, the website can  provide a wide variety of information, from posting an exam schedule to announcing an early dismissal because of inclement weather.  The website can also effectively communicate the schools vision and mission, the qualities, and the offerings to each of these stakeholders. In effect, the school website presents the personality of the school. What Goes on the Website Most school websites have the following basic information: Calendars for school activities, school schedules, and bus schedules;  Policy statements (ex: dress code, Internet use, attendance);School news on individual student achievements or group achievements;Information on the school learning activities including academic requirements, course descriptions, and prerequisite course work;Information on school extra-curricular activities (ex: clubs and athletic program);Links to teacher web pages and also staff and faculty contact information; Some websites may also provide additional information including: Links to organizations or websites outside the school that support the schools academic program (ex: College Board-Khan Academy)Links to software that  contain student data  (Naviance,  Powerschool, Google Classroom)Links to forms (ex: permission slips, course registration, attendance waivers, transcript requests, free and reduced lunch) that can reduce the  costly reproduction of paper copies;Board of Education resources such as contact information for board members, minutes of meetings, agendas, and meeting schedules;District policies, such as those policies on data privacy;Photos of students and faculty;A forum or discussion page for  teachers, administrators, students, and parents to exchange information such as news and calendars of events;Links to school social media accounts (Facebook, Twitter, etc). Information placed on the school website will be available 24 hours a day, 7 days a week, 365 days a year. Therefore, all the information on the school website must be timely and accurate. Dated material should be removed or archived. In real time information will provide stakeholders confidence in the information posted.  Up to date information  is particularly important for teacher websites that list assignments or homework for students and parents to see. Who Has Responsibility for the School Website? Every school website must be a reliable source of information that is communicated clearly and accurately. That task is usually assigned to a schools Information Technology or IT Department. This department is often organized at the district level with each school having a  webmaster for the school website. There are a number of school website design businesses that can provide the basic platform and customize the site according to a schools need. Some of these include Finalsite, BlueFountainMedia,  BigDrop, and SchoolMessenger. Design companies generally provide the initial training and support on maintaining the school website. When an IT Department is not available, some schools ask a faculty or staff member who is particularly technologically savvy, or who works in their computer science department, to  update their websites for them.  Unfortunately, building and maintaining a website is a  large task that can take  several hours a week. In such cases, a more collaborative approach of assigning responsibility for sections of the website might be more manageable. Another approach is to use the website as a part of the school curriculum where students are given the task of developing and maintaining  portions of the website. This  innovative approach benefits both the students who learn to work collaboratively in an authentic and on-going project as well as educators who can become more familiar with the technologies involved. Whatever the process for maintaining the school website, the ultimate responsibility for all content must lie with one  district administrator.   Navigating the School Website Possibly the most important consideration in designing the school website is the navigation. The navigation design of a school website is particularly important because of the number and variety of pages that may be offered to users of all ages, including those who may be unfamiliar with websites entirely. Good navigation  on a school website should include a navigation bar, clearly defined tabs, or labels that clearly differentiate the pages of the website. Parents, educators, students, and community members should be able to travel throughout the entire website regardless of the level of  proficiency with websites.   Particular attention should be given to encouraging parents to use the school website. That encouragement might include training  or demonstrations for parents during school open houses or parent-teacher meeting. Schools could even offer technology training for parents  after school or on special evening activity nights. Whether it is someone 1500 miles away, or a parent living down the road, everyone is afforded the same opportunity to see the schools website online.  Administrators and faculty should see school website as the front door of the school, an opportunity to welcome all virtual visitors and make them feel comfortable in order to make that great first impression. Final Recommendations There are reasons to make the school website as attractive and professional as possible. While a private school may be looking to attract students through a website, both public and private school administrators may be seeking to attract high-quality staff who can drive achievement results. Businesses in the community may want to reference a schools website in order to attract or expand economic interests. Taxpayers in the community may see a well-designed website as a sign that the school system is also well-designed.

Saturday, December 21, 2019

Climate Change Of Global Warming - 924 Words

Figure 0.1 shows the different effects of global warming. Global warming is the warming of our planet at an extreme rate. The Earth’s climate has warmed by 7.8OC since 1880. (Quick facts about science, 2015). What causes global warming? The cause of global warming is the carbon dioxide. This acts like a blanket. Protecting the earth, and heating the earth. Sun rays would normally bounce around the earth, but with the blanket, the sun rays heat the blanket which heats the earth. (Petersen Science Text Book by G. Linstead, W. Clarke, 2015). â€Å"Of all the wealthy countries, we are probably the most vulnerable,† says Professor Will Steffen, executive director of ANU’s Climate Change Institute. â€Å"We’re locked into another 0.5OC temperature rise due to past emissions, but what we do between now and 2050 is crucial for the magnitude and rate of climate change later this century and beyond,† he says. (ABC, 2015) Figure 1.0 shows the percentage of carbon emissions being emitted into the atmosphere. Humans are contributing more and more to the amount of carbon dioxide being emitted into the atmosphere because every person now has a car and each car releases 9 kilograms of carbon dioxide into our atmosphere. Every factory has huge pipes, which are used to emit thousands of kilograms of carbon dioxide into our atmosphere. This is leading to the cause of global warming because carbon dioxide attracts heat from the sun, which acts as a blanket, like a green house. With the layers ofShow MoreRelatedGlobal Warming And Climate Change974 Words   |  4 Pagesabout global warming, whether it is true or false. Is there evidence to prove that global warming has impacted the climate due to the rise in the earth’s temperature? Climate change is a problem that is worldwide that should be reviewed. The rise in the earth’s temperature has caused some impact to the weather and climate changes to many places worldwide. This rise in temperature has the potential of causing drastic changes to the earth in many ways. It is time to view the global warming concernsRead MoreGlobal Warming And Climate Change1398 Words   |  6 Pages Global warming and climate change have been frequent topics of discussion over the past several years. Although people tend to focus on the politics, it is important to look past the media aspects of it into the cold hard facts of what our Earth is currently experiencing, and what has caused it in the first place. The cause of climate change includes natural causes, but human causes are what is generating such a rapid global temperature change. It’s time that the ways in which humanity affectsRead MoreClimate Change And Global Warming1060 Words   |  5 PagesClimate change (Klaus) 1000 The terms â€Å"global warming†, â€Å"climate change† or â€Å"greenhouse effect† have become more than just parts of the popular lexicon as they rather are subject of public discussions, scientific research or political debates. Despite the popularity and the ubiquity of these terms, the public’s theoretical and conceptual understanding of them and their causal relations is often based on superficial knowledge and buzzwords or caricatures outlined and depicted in several popular mediaRead MoreClimate Change : Global Warming1194 Words   |  5 PagesDonya Curtis April 19, 2017 English 1001-rough draft Global Warming Global warming is one facet of the broader term climate change. It is the increase in the average temperature of the Earth s surface air and oceans from the mid 20th century and the projected continuation. The Global warming is primarily the consequence of building up greenhouse gasses in the atmosphere. Emission rates for most important anthropogenic greenhouse gas, CO2, have increased 120 fold in the past 140 years. WhileRead MoreClimate Change and Global Warming1074 Words   |  5 PagesClimate change and Global Warming are out of control. This means that, no matter what policies, processes or actions are implemented, the Earth as we know it will never be the same again. There is significant evidence to support this hypothesis. The dilemma becomes whether we can limit the damage and adapt to a new status quo or not. Rising sea levels and the damage caused by this phenomenon has irreversible impacts on coastlines worldwide. Damage to sensitive reef systems cannot be fixed. This alsoRead MoreClimate Change And Global Warming1022 Words   |  5 PagesWhat = Climate Change Who = Emma, Aoife, Julia, Rachael, Mariah and Cà ©line What is it? Climate Change is a change in the demographic distribution of weather patterns, and related change in oceans, land surfaces and ice sheets, happening over time scales of decades or longer. It’s the world’s greatest threat. Climate change is the change in temperature over a period of time. It involves the greenhouse effect and global warming. Where is it? It is an issue affecting everyone everywhere. ClimateRead MoreClimate Change And Global Warming1474 Words   |  6 Pagesphenomenon, known as â€Å"smog† became an often daily occurrence in big, urbanized cites across the globe. Also, Al Gore’s book, An Inconvenient Truth, popularized the issue of climate change and global warming as a result of the damage that the modern world has done to the atmosphere. He noted that people resist the facts about climate change due to the inconvenience of changing their lifestyles. But, uninhibited industrialization of several countries has led to intense modernization and revolution of theRead MoreClimate Change And Global Warming928 Words   |  4 PagesThis paper will discuss climate change and global warming on the economy. The paper also gives a description on climate change and global warming. As well as what it hold for future business owners. It will also discuss what the government is doing about climate change/global warming. Climate change is a long-term shift in the statistics of the weather (including its averages). For example, it could show up as a change in climate normal (expected average values for temperature and precipitation)Read MoreClimate Change And Global Warming1630 Words   |  7 PagesClimate Related Threats Global warming will lead to uncontrollable devastation such as famine, war, and economic instability. Climate change will accelerate the dislocation of hundreds of millions of people and the extinction of many species. The negative effects of climate change are obvious on every continent. Professor Le Quere, director of the Tyndall Centre for Climate Change Research at the University of East Anglia said, The human influence on climate change is clear. The atmosphere andRead MoreClimate Change And Global Warming1412 Words   |  6 Pages Earth’s climate has been changed for hundreds of year dating back to the beginning of man to the ice age and today, and with that change came scientists who have been keeping track and gathering data on these changes in the climate. The climate is the source of life it provides a secure environment setting for life forms to thrive without a proper climatic setting life would begin to dwindle and eventually all life forms would go extinct . But why is the climate so important moreover exactly what

Thursday, December 12, 2019

Chemistry Stpm free essay sample

A Structural Questions: Question 1. (a)(i) The presence of isotopes 1M (ii) Let the abundance of 63X be a %. The % abundance of 65X. = ( 100 – a ) 1M Relative atomic mass = ( 62. 93 x a) + ( 64. 93 x ( 100 -a) ) 1M 100 63. 55 = 62. 93a + 6493 -64. 3a 100 6355 = -2a + 6500 a = 69. 0% 1M The % abundance of 65X = 100- 69. 0 = 31. 0 % Relative abundance 63X : 65X 1 : 2 1M (iii) Relative Abundance 63 64 65 Relative mass /m/e 2M SpeciesprotonsneutronsElectrons 20 Ne 10 10 10 10 16O2- 8 8 8 10 2 M The species have same number of electrons or isoelectronic. M - 10M 2. (a) (i) H2O2 + 2H+ + 2 I- 2H2O + I21M (ii) Rate = k [H2O2] [I-]1M (iii) 0. 21M 0. 11M (iv) second order1M (b) (i) 121M (ii) 1s2 2s2 2p6 3s2. 1M (iii) +2 , X has two valence electrons2M (iv) X is a better electricity conductor. 1M - 10M 3. (a) Atomic size increases, screening effect increases with more inner shells of electrons 1M effective nuclear charge decreases, ionisation energy lowered, valence electrons are more easily removed. 1M (b) i. Be2+ (aq) + 4H2O (l) [ Be (H2O)4 ]2+ (aq)1M ii. It is acidic, acting as a Bronsted-Lowry acid1M The Be2+ ion has a high charge density 1M and can strongly polarise large anions due to its smaller size. 1M The ions of other Group 2 elements have larger sizes and charge densities and weaker polarising power (d)i. platinum and rhodium1M ii. 4NH3(g) + 5O2(g) ? 4NO(g) + 6H2O (g)1M iii. low temperature1M low pressure1M ( Note : The reaction is exothermic reaction. According to le Chatelier principle, a low temperature will favour the formation of NO. For gaseous equilibrium, a decrease in pressure will favour the reaction which produces more gaseous molecules. Thus in the above equilibrium a low pressure will avour the formation of NO. ) ________ 10M 4. (a) i. A is CH3CH2CH2COOH1M B is CH3CH2CH2COCl1M C is CH3CH2CH2COOCH2CH 1M ii. butanoyl chloride1M iii. Formation of ester: CH3CH2CH2COCl + CH3CH2OH CH3CH2CH2COOCH2CH3 + HCl1M (b) i. H3N+CH2COOH + H2NCH(CH3)COOH H2NCH2CONHCH(CH3)COOH + H2O1M Glycylalanine1M ( Note: Alanylglycine can also be formed ) ii. The amino group –NH2 which is basic group reacts with hydrochloric acid to form the ammonium chloride salt of alanine1M HOOCCH(CH3)NH2 + HCl HOOCCH(CH3)NH3+Cl- 1M ___________ 10 M SECTION B ESSAY 5. (a) (i) Orbitals with the same energy1M Example : 2p or 3d s orbitals1M ii) Nitrogen atom has 7 electrons 1M Fill 1s orbital with 2 electrons1M Fill 2s orbital with 2 electrons1M Fill 2px,2py and 2pz orbitals with 3 electrons1M / 6 1M (b) Fe 2+ 1s2 2s2 2p6 3s2 3p6 3d4 1M Fe 3+ 1s2 2s2 2p6 3s2 3p6 3d5 1M In terms of electronic configuration, Fe 3+ is more stable than Fe 2+ 1M Because it has half-filled 3d orbital which is more stable1M. / 4 (c ) The valence electronic configuration of t he electrons for nitrogen atom is 2s2 2px1 2py1 2pz11M Nitrogen atom uses sp3 hybrid orbitals for forming covalent bonds between N and H atoms. Energy 2p sp3 hybrid porbitals N(ground state) 1M In sp3 hybrid orbitals of nitrogen atom,one of the orbitals Is occupied by a lone pair of electrons and three sp3 orbitals are half filled 1M Each N-H atom is formed by the overlapping of the s orbital of hydrogen atom with one of the half filled sp3 orbitals to give the ammonia molecule 1M Diagram of the bond formation in NH3 molecule. M /. 5 - Total : 15 M 6. (a) Dyanamic equilibrium . a reversible reaction , in a closed system forward and backward reactions have the same rate of reaction. 2M (b) (i) N2O4 2NO2 Kc = [NO2] 2 = [0. 12] 2 [N2O4] [0. 04] = 0. 36 mol dm-3 5M (ii) Using PV =nRT where n = 0. 12 +0. 04 = 0. 16 mol P = 0. 16 (8. 31) (383) 10 -3 = 509. 24 kPa. 3M (c) N2(g) + 3H2(g) 2NH3(g) at low temperatures, % NH3 is higher forward reaction is exothermic equilibrium position shifts to the right at higher temperature -forward reaction is accompanied by a reduction in volume of gas -at higher pressures, equilibrium position shifts to the right -at high pressures, % NH3 is higher5M Total : 15M No. 7 (a)(i) Aluminium metal is extracted by electrolysis The electrolyte is molten bauxite in sodium hexafluoroaluminate. The electroyte has aluminium ion and oxide ions. Anode : 2O2- gt; O2 + 4e Cathode : Al3+ + 3e gt; Al5M (ii) (Any 2 points) light Resistant to corrosion Strong alloy2M `(b)aluminium : A giant metallic structure, strong metallic bonf. Silicon : giant 3 D covalent structure. Strong covalent bond between silicon atomes. higher melting point Phosphorus and sulphur Both are simple molecules. Weak van der waals between molecules Sulphur has a stronger intermolecular forces – S8 larger than P48M No 8. (a) chlorine – strong oxidation agent Bromide is oxidized to bromine EÂ ° of chlorine is more positive than that of bromine. Cl2 + 2Br- - gt; 2Cl- + Br24M (b)iodine forms triodes complex in KI. I2 + I- - gt; I3- Iodine does not form any complex ions in water. I2 + 2H2O gt; I-Â ¬ + HIO + H3O+4M (c)HCl is released in cold acid NaCl + H2SO4 a NaHSO4 + HCl If heated more HCl released. NaHSO4 + NaCl -a Na2SO4 + HCl4M (d) Iodide is oxidized to iodine Purple Iodine is released Pungent smell of H2S is detected3M Total : 15M 9. ( a ) ( i ) order : W, Y, X W, Y, X act as Lewis bases. X is the strongest base because ethyl group is an electron donor by inductive effect. Y is more basic than W because the lone pair electron on the N atom is not delocalised. W is less basic than Y because the lone pair electron on the N atom is delocalised into the benzene ring. M ( ii ) pKb value gt; 9. 39 Z is a weaker base than W. Presence of Cl an electron withdrawing group reduces the donating potential of lone pair electron on the N atom through inductive effect. 4M ( b ) Concentated H2SO4 and HNO3. , 550C Mechanism: HNO3 + H2SO4 NO2+ + HSO4– + H2O NO2+ is an electrophile. H + NO2+ NO2 H NO2 + HSO4– –NO2 + H2SO4 + HNO3 –NO2 + H2O 6M Total : 15 marks 0. ( a ) ( i ) Terylene/Dacron ~~~~O CH2 CH2 O C – –C O CH2 CH2 O C – –C~~~~ 3M || || || || O O O O ( ii ) Condensation polymerisation To make cloth/sleeping bags, etc 2M ( b ) ( i ) K: functional group : -OH isomers : CH3CH2CH2OH and CH3CHCH3OH arm isomers separately with alkaline iodine, CH3CHCH3OH gives a yellow precipitate but CH3CH2CH2OH does not. CH3CH2CH2OH + 4I2 + 6OH– CHI3 + 5I– + 5H2O + CH3COO– 5M (ii ) L : functional group : ? C = O | Isomers : CH3CH2CHO and CH3COCH3 warm isomers separately with Tollen’s reagent. CH3CH2CHO gives a silver mirror but CH3COCH3 does not. CH3CH2CHO + 2[Ag(NH3)2]2+ + OH– CH3CH2COO– + 2Ag + 2NH4+ + 2NH3 5M Note: Can also accept other suitable chemical test. Total : 15 marks