الرئيسية منتديات مجلس الثقافة العامة بحوث لعيون ناصر علي

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  • #1062282
    عماني حيل
    مشارك

    البحث الثاني إهدا لعيون طالبينه بدر سعيد وصالح سالم القنوبي
    Indoor Air Pollution

    Many people spend large portion of time indoors – as much as 80-90% of their lives. We work, study, eat, drink and sleep in enclosed environments where air circulation may be restricted. For these reasons, some experts feel that more people suffer from the effects of indoor air pollution than outdoor pollution.
    There are many sources of indoor air pollution. Tobacco smoke, cooking and heating appliances, and vapors from building materials, paints, furniture, etc. cause pollution inside buildings. Radon is a natural radioactive gas released from the earth, and it can be found concentrated in basements in some parts of the United States. Additional information about the radon problem is available from the USGS and the Minnesota Radon Project.
    Pollution exposure at home and work is often greater than outdoors. The California Air Resources Board estimates that indoor air pollutant levels are 25-62% greater than outside levels and can pose serious health problems.
    Both indoor and outdoor pollution need to be controlled and/or prevented.
    How can we prevent the damaging effects of air pollution?
    Why study black carbon pollution?

    Black carbon pollution is the release of tiny particles into the air from burning fuel for energy. Air pollution caused by such particulates has been a major problem since the beginning of the industrial revolution and the development of the internal combustion engine . Scientific publications dealing with the analysis of soot and smoke date back as early as 1896. Mankind has become so dependent on the burning of fossil fuels (petroleum products, coal, and natural gas) that the sum total of all combustion-related emissions now constitutes a serious and widespread problem, not only to human health, but also to the entire global environment.
    Additional resources dealing with the problems associated with particulate pollution are available from Burning Issues. (This group has additional information at a second site.)
    In recent years, there has been great concern about black carbon pollution of the air in parts of Eastern Europe. Education is one important step toward correcting the problem.
    Taking black carbon measurement to
    Eastern Europe

    In 1989, a high school biology teacher named Dean Rockwell came from Macomb, Illinois to spend a summer in the DOE Teacher Research Associate Program (TRAC) at Lawrence Berkeley National Laboratory. He was assigned to work with a research group studying the earth’s atmosphere. One of the scientists, a physicist named Tony Hansen, was part of this group. Tony is the inventor of an instrument capable of measuring graphitic carbon aerosol (a suspension of airborn carbon particles better known as soot). Soot is a major atmospheric pollutant. Tony developed a device to measure this pollutant, and he introduced Dean to its use.
    After learning more about the instrument, Dean and Tony discussed the possibility of developing a similar device that could be easily understood, built, and operated by students. They challenged themselves to make an instrument that would be inexpensive , so that teachers could afford to assemble it on their small science budgets. Tony and Dean developed a procedure that used simple, commonly available materials such as facial tissue, a vacuum cleaner, a large garbage bag, a light bulb, plastic cups and a $2.40 photo cell that could be attached to an ammeter. Tony and Dean built the instrument out of these simple materials and they tested it. To their surprise, this low-tech procedure produced data that were extremely similar to those provided by Tony’s best high-tech equipment!
    Tony had developed research collaborations with scientists in Eastern Europe even before the Berlin Wall fell. The air pollution problem, particularly the soot concentration in Eastern European countries, can be ten times greater than the concentration on a bad day in Los Angeles. European scientists discussed their limited resources and their desire to set up a network to monitor air pollution. Tony suggested that they try the instrument that he and Dean had developed. This idea was very interesting to scientists in Slovenia .
    Dr. Mirko Bizjak, of the National Chemistry Institute of Slovenia, thought it would be a good idea to involve and educate school children about environmental issues. In the summer of 1992, Dean Rockwell was invited to visit 10 schools in Slovenia and to talk about the program to school science teachers. The teachers were enthusiastic. Through the Slovenian Board of Education, Dr. Bizjak developed information packets and a training video that were sent to interested school teachers.
    The idea caught on. School children volunteers and their teachers/mentors built their own sampling and analysis devices in school shops and laboratories.
    Dr. Ulle Kikas, an educator and scientist from Tartu University in Tartu, Estonia learned of the Slovenian program in 1992 received instructional materials from Drs. Bizjak and Hansen. The school-based measurement program also caught on fast in Estonia.
    Today, over 60 schools in Slovenia share data on the Internet in this national network. Classroom materials have been developed for all grade levels, and older students receive and analyze data. In Estonia, the 12 schools that measure soot in the atmosphere comprise the only air pollution monitoring network in this small country!
    This work has been reported in the Journal for Chemical Education (Vol. 71, pp. 318-23, 1994), the Bulletin of the World Meteorological Organization (Vol. 43, No.1 January 1994, p. 60) and the 5th International Conference on Carbonaceous Particles in the Atmosphere .

    تحياتي عماني حيل

    #1062290
    عماني حيل
    مشارك

    البحث الثالث يتحدث عن السياحة في عمان

    Sultant Of Oman
    Ause bin Al-Samet school

    Tourism in Oman

    for My teacher: Samer Al-Hdad

    from student : Hilal

    Oman can offer a compelling sense of exploration and discovery, and a wildlife holiday that few would imagine possible. Tourism aimed specifically at those interested in the natural environment, or eco-tourism, may be the keystone to the future of the industry in Oman. Thoughtfully planned and carefully managed it will allow for the generation of revenue without clashing with conservation concerns and cultural heritage.
    The stark beauty and wide range of contrasting landscapes that characterize the country create habitats for a wealth of wildlife. Among the variety of fauna and flora are millions of migrant wading birds passing through year after year; entire marine ecosystems unique to science; mountain, desert and shoreline plants of stunning diversity; desert dwellers of surprising abundance; endangered Arabian mammals like leopard and oryx; seashells of exquisite nature; coral reefs that stud the sea with vibrant colours; innumerable endemic fish; whales and dolphins from coast to coast and turtles that nest in numbers matched by no other country on the planet. And alongside the natural wealth is a culture as rich as the sea, mountain and desert environments with which it has arisen.
    The Mountainous North
    Wadis dissect the mountains of northern and central Oman and provide the only means of access to many areas. While most wadis are seasonal, some have a constant flow of water, attracting settlement and also wildlife. Red foxes are frequent evening visitors, skirting the villages in search of scraps. Mountain gazelle are still a regular sight and their ‘v’ shaped hoof prints (distinct from the two parallel imprints left by a goat hoof) are easy to find in sandy areas. Hares, which include a race unique to Oman, small rodents and even wolves may still be found, although the latter are more likely to be seen further south.
    To access many of the areas where wildlife is more commonly encountered means leaving your vehicle and continuing on foot. Blue-headed agamid lizards will scurry from sun-drenched rocks at your approach and ‘water snakes’ (most commonly, racers) will lie in wait in, or at the edge of, pools for unsuspecting fish, other reptiles, Arabian toads and even rodents that dare to venture to the water’s edge to drink. Bats can be found in many of the extensive cave systems and birds of prey such as Egyptian Vultures and, for the lucky, Golden Eagles, circle above magnificent mountain panoramas. A trip to see the remarkable juniper forests at the 3000 metre summit of Jabal Shams (‘Sun Mountain’) is well worth the effort, if only to take in the breathtaking views on top of Arabia’s highest peak. Here is one of the few places in the peninsula where snowfall is not unexpected in winter months. Visitors to Oman’s northern mountains should also keep a vigilant eye open for the nimble-footed tahr, a rare and shy goat-like animal confined and unique to this small, mountainous part of the world.
    Deserts
    The deserts of Oman vary from the rolling sand seas of the Wahiba, with classic photogenic dunes of rich gold, to the flat stony Jiddat al Harasis in central Oman and the Rub al-Khali or ‘Empty Quarter’ further south, where individual mountains of sand rise from a flat desert and stretch endlessly across the border into Saudi Arabia. However, far from being empty, the desert is host to a surprising amount of wildlife. Caracal lynx, sand foxes and wild sand cats, with hair-covered feet that help provide grip in soft sand, are some of the larger predators. Rheem gazelle, Arabia’s largest gazelle, also seem to prefer sandy regions. On rocky outcrops, such as the Huqf escarpment to the east of the Jiddat al Harasis plains, live Nubian ibex. They are also found in more mountainous areas in Oman. The males, in particular, are an impressive sight, sporting magnificent horns with which they spar for females. The desert provides habitat too for skinks, lizards and geckos and their more deadly cousins, such as the saw-scales or carpet viper and the horned adder. A host of small rodents survive the desert heat despite the high metabolic rates of small mammals. A number of species of gerbils, jirds, jerboas, mice, shrews and rats have all adapted to life under harsh conditions. Flocks of Coronetted, Chestnut-bellied, Spotted and Lichtenstein’s Sandgrouse can be regularly seen at precise times, soaking their modified breast feathers in precious watering holes and transporting the stored water to ground nests some distance away. There are very few people, even those who have visited desert environments many times, who are not continually surprised and enthralled by the activity and profusion of wildlife.
    White Oryx Project
    In the flat stony desert of central Oman live the famous Arabian oryx. Once hunted to extinction in the wild, the last herds were seen in this area in the late 1970s. Fortunately a small collection of zoo animals existed in a number of separate localities around the world from which suitably mixed herds could be assembled. Now, reintroduced herds enjoy the protection of the conservation-minded ways of the local Harasis tribes, members of which have become their guardian rangers. Vegetation, nourished by sea blown mists, supports the oryx numbering over 230 animals, many of which were born in the wild. Some are even second generation wild animals. World-wide the Arabian or White Oryx Project in Oman is heralded as one of the most successful animal reintroduction schemes ever attempted and the entire area where the oryx now roam has been designated a world heritage park.
    Dhofar
    Precambria basement sediments have formed the Dhofar mountains in the far south of Oman. The mountains and narrow coastal belt benefit each year from moisture-laden south-west monsoon winds or khareef. Rains from early July to the end of August and heavy mists create lush green hillsides and cool temperatures more reminiscent of a English spring than an Arabian summer. Immediately behind the mountain range the desert heat continues to scorch the earth. With obvious reason, this seasonal transition has created a haven for many forms of wildlife and has made possible spectacular mountain drives and hikes. The best time to visit is September, when mists have lifted to reveal the luxuriant green landscape.
    The capital of the southern region of Dhofar is Salalah, known throughout Arabia as ‘The Garden City’. It has the feel of a small East African coastal town, relaxed, cool and humid and rife with banana, coconut, sugarcane and papaya plantations. Beyond the plains of Salalah where frankincense trees grow, rise the wooded hillsides of Jabal Qara. The vegetation that clads the southern mountains is unique in Arabia. The dominant and endemic Anogeissus dhofarica was only scientifically described in 1979 despite its abundance. Among the vegetation are trees more commonly associated with Africa and Asia, such as the enormous and bizarre baobab. There is a population of about 50 baobab trees growing on the sloping valleys of Wadi Hinna, not far from Salalah. Perhaps these are a relict population of a once wider distribution of the species or perhaps they are a reminder of early traders from East Africa. The desert rose is an attractive and distinctive plant which was used for medicinal purposes by the Jibbali people of the Dhofar hills
    Although there are no permanent watercourses in Dhofar, during the monsoon great waterfalls tumble over limestone cliffs into the sea several hundred feet below, and springs such as those at Ayn Razat and Ayn Jarsis bubble with freshwater. Pools remain in many of the wadi beds long after water has ceased to flow, and, some, such as Wadi Darbat, contain a constant supply of water for resident and passing wildlife. Heading east from Salalah, monsoon clouds quickly disperse as they spill over the mountain tops of the Jabal Samhan. Similarly, Jabal al Qamar to the west only enjoys monsoon mists and rains during exceptional years. However, even where the greenery ends, wildlife thrives. Leopard, caracal, hyaena, wolf and ratel all find territories along with many others. Hedgehogs and the nocturnal vegetarian porcupines leave evidence of their presence with a handful of shed quills, and birds pass through in their thousands.
    Where wadis reach the sea, lagoons, or khors, form along the coast, acting as a focal point for wildlife, especially birds. Reeds and reedmace typically line the landward rims of the khors while the salt tolerant mangrove trees spread to seaward in more saline conditions. Some of the more spectacular birds to frequent Oman are to be found in khors. The stately flamingo filters food from the shallow sediments, colourful ducks, storks, stilts, plovers, sandpipers, egrets and herons wade nearby and the glossy ibis feeds on insects at the water’s edge. Some of the khors are set aside as reserve areas where visitors are not allowed. However, the majority will remain open to the public provided that due care and respect is paid to the wildlife and its fragile habitat.
    To the north-east of Salalah, still in the southern province of Dhofar, is a beautiful sand beach 30 km in length that sweeps the bay that is the mouth of Oman’s largest and probably most spectacular wadi – Wadi Shuwaymiyah. The wadi forms a huge snaking canyon, sided by dramatic vertical cliffs of white limestone. Long fingers of porous travertine form stalactites along overhanging cliff edges and deep permanent pools of sweet water are advertised by the growth of surrounding vegetation. The scenery is fascinating and quite breath-taking and the canyons form a natural refuge for wildlife and may be considered a valuable national nature reserve. Hyrax, a colonial rodent-like animal that through its bone structure shows a common ancestry with elephant and rhinoceros, will issue its warning to others on the approach of human visitors and dart into the many nooks and crannies between boulders on the canyon floors. Hyaena, ibex and gazelle are among many other mammals to be seen and Green Pigeons can be found roosting in wild fig trees, while owls call at night. Wadi Shuwaymiyah lies in a remote and difficult region to access. Perhaps this is fortunate, for the wealth of natural beauty may remain relatively untouched and undisturbed.
    The coast of Dhofar boasts some of the most beautiful beaches in the Sultanate. At certain times of the year many of these beaches are criss-crossed by the tracks of turtles that return seasonally to nest. The beaches below the spectacular headlands and cliffs of Ra’as Hamar, just half an hour’s drive west of Salalah, is one spot where it is possible, in late summer months, to watch both green and loggerhead turtles nesting simultaneously.
    Turtle -Watching
    There are, in fact, four species of turtle that nest in Oman, (the highly endangered hawksbill and the rare-for the-region olive ridley, are the other two), some in world record and globally significant numbers. The best location for turtle-watching is about 400 km south-east of Muscat, not far from the dhow-building port of Sur, at Ra’s al Hadd. Here green turtles nest all year round in numbers that exceed any other single location in the Indian Ocean .
    Permits are provided by the Ministry of Regional Municipalities and Environment for camping in the Ra’s al Hadd area, which has been designated a national nature reserve. The campsite to which visitors are restricted is situated at two of the prime nesting beaches. Turtle -watching tourists are guided by locally employed turtle wardens from nearby villages, such as Ra’s al Junays. Rules and regulations are designed to prevent disturbance of the globally endangered turtles, but still allow for good viewing. The sight of a full grown female turtle emerging from the sea to lay her eggs as her ancestors have been doing for the past 90 million years, is an exciting experience that is not easily forgotten. Photography is encouraged only at dawn, using natural lighting so as to avoid disturbance to both nesters and hatchlings. The best months of the year to watch turtles are August and September. Nesting numbers are high and the chance of seeing hatchlings is also very good. However, it is unlikely that you will be disappointed at any time of the year.
    Underwater Oman
    There is a wealth of scenery, wildlife, pleasure and opportunity awaiting divers in the Sultanate of Oman. There is also the constant promise of discovery of new places, species and phenomena. Much of the rocky coast and islands of the Sultanate with their many exciting underwater sites are easily accessible to divers. The water is warm all year round and the underwater world offers dramatic scenery, close contact with nature, and great opportunity for exploratory diving. A lucky few have even dived with whales in Oman and snorkelling with dolphins is a hobby of those who have taken time to get to know these intelligent and lovable marine mammals. There remain many areas that have never been dived before and knowing that you are the first human being to view a particular site conveys a sense of excitement and anticipation. The observant are rewarded with new species of fishes, corals, shells and almost any other form of marinelife.
    Eco-tourism in Oman
    The government of Oman, particularly through the Ministry of Regional Municipalities and Environment, has carried out many scientific studies and surveys in order to set aside key regions of importance to wildlife as protected areas. The Directorate General of Nature Protectorates is in the process of planning legislation and effective natural reserve systems to ensure the conservation of natural resources. Similarly, the Directorate General of Tourism is, at the time of writing, reviewing policies and investigating the possibility of eco-tourism in new areas. Visitors to Oman who wish to view the natural wildlife and beauty of the country should be aware that some areas may soon be placed under controlled access and it is sensible to seek the advice of officials for up-to- date information.
    We should all remember our responsibility to protect Oman’s wildlife and its range of valuable habitats. As a country new to the concept of eco-tourism, both the environment and the culture of a distinct and deserving people require time to adapt to the pressures that are inevitably forced upon them by the tourism industry. Those people fortunate enough to explore the Sultanate today will be the first to acknowledge the need to protect the fragile ecosystems and the sensitive culture of a beautiful country for those who will explore and enjoy it in the future.

    من يوم شاف صورتي في الجريدة
    وهو يداعبي بسلك التيلفون
    صورة بليا صوت هزت وريده
    يالله عسى يشوفني في التلفزيون
    يا أهل العقول الواعيات السديدة
    لو أنكم فزاع وش بتسون
    لو قلت لكم سولفو بجملة مفيدة
    جملة فيها الحب مخزون

    من روائع فــــــــزاع

    #1062293
    عماني حيل
    مشارك

    أن مستعد لأي طلب وعسى الله قدرني أن أوفر هذه البحوث التي
    تطلبني أياها ناصر علي وكذلك بدر سعيد وصالح سالم وأنا مستعد
    لأي تطلباتي يطلبوها أعضاء المجلس وكذلك المتميز دائم حمود علي

    #1062328
    عماني حيل
    مشارك

    قصة بالإنجليزي

    A long time ago, there was a huge apple tree.

    A little boy loved to come and play around it everyday.

    He climbed to the treetop, ate the apples, took a nap under the shadow…
    He loved the tree and the tree loved to play with him.
    Time went by…the little boy had grown up,
    And he no longer played around the tree every day.
    One day, the boy came back to the tree and he looked sad.
    “Come and play with me,” the tree asked the boy.
    “I am no longer a kid, I do not play around trees any more”

    The boy replied.

    “I want toys. I need money to buy them.”
    “Sorry, but I do not have money…
    But you can pick all my apples and sell them.
    So, you will have money.
    ” The boy was so excited.
    He grabbed all the apples on the tree and left happily.
    The boy never came back after he picked the apples.
    The tree was sad.
    One day, the boy who now turned into a man returned
    And the tree was excited “Come and play with me” the tree said.
    “I do not have time to play. I have to work for my family.

    We need a house for Arb3Arb3Arb3Arb3ter.

    \Can you help me?
    ” Sorry”,

    But I do not have any house. But you can chop off my branches
    To build your house.
    ” So the man cut all the branches of the tree and left happily.
    The tree was glad to see him happy but the man never came back since then.
    The tree was again lonely and sad.
    One hot summer day,

    The man returned and the tree was delighted.
    “Come and play with me!” the tree said.
    “I am getting old. I want to go sailing to relax myself.
    “Can you give me a boat?”

    “Said the man”.

    #1064347

    مشكور ع البحوث …
    يعطيك الف عافيه

    اعتقد الموضوع يتناسب اكثر مع مجلس التعليم العصري

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