68 résultats pour "belt"
- belt
- belt. belt, mot anglais signifiant littéralement « ceinture » (le mot
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Kuiper Belt - astronomy.
III RESEARCH The Kuiper Belt is an exciting area of research in astronomy. The discovery and astronomical exploration of the Kuiper Belt over the past decade have fueled arevolution in scientists’ views of the solar system. Today astronomers recognize the Kuiper Belt as the third major region of the solar system (the other two regions arethe inner solar system, with its small rocky planets, and the outer solar system, with its gas-giant planets). They believe that the belt helps explain Pluto’...
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Les Etats-Unis: Le dynamisme de la « Sun Belt » ?
Francisco en 1989). 3. L'abondance des ressources du sous-solComme d'autres régions des États-Unis, la « Sun Belt » est dotée de ressources du sous-sol : l'or californien n'estsans doute plus qu'un mythe, mais l'or noir, c'est-à-dire le pétrole et le gaz naturel l'ont remplacé. Les gisementscaliforniens écoulent une production bien moindre que ceux du mid-continent et surtout des bords du golfe duMexique (Texas, Louisiane). Ils fournissent aussi le soufre dans les Etats-Unis ont besoin. D'...
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La «Sun Belt» des États-Unis ?
Francisco en 1989). 3. L'abondance des ressources du sous-solComme d'autres régions des États-Unis, la « Sun Belt » est dotée de ressources du sous-sol : l'or californien n'estsans doute plus qu'un mythe, mais l'or noir, c'est-à-dire le pétrole et le gaz naturel l'ont remplacé. Les gisementscaliforniens écoulent une production bien moindre que ceux du mid-continent et surtout des bords du golfe duMexique (Texas, Louisiane). Ils fournissent aussi le soufre dans les Etats-Unis ont besoin. D'...
- belt - encyclopédie.
- Sun Belt.
- Black Belt.
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La Sun Belt
hydrocarbures, les industries pétrochimiques et de Techniques de pointe (biotechnologies, aérospatiale). De même, celle-ci est soutenue par un réseau dense d'universités. En plus, la culture du Texas reflète des influences et des héritages multiples : hispaniques, afro-Américains, anglo-saxons et amérindiens. Ainsi, l'identité de l'État repose sur un folklore vivant (country, rodéo, western). D’ailleurs, l’image mythique du cow-boy est préservée. Et, leurs parcs naturels sont connus...
- Radiation Belts - astronomy.
- Le Copper Belt (géographie).
- Le Wheat Belt (géographie).
- Corn Belt (« Ceinture du maïs »), région du centre-ouest des États-Unis (Iowa, Illinois et États voisins), où la culture dominante est celle du maïs.
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Asteroid - astronomy.
Asteroids of the S type, related to the stony iron meteorites, make up about 15 percent of the total population of asteroids that can be seen from Earth. Much rarer arethe M-type objects, corresponding in composition to the meteorites known as “irons.” These objects are made up of an iron-nickel alloy and may represent the cores ofbodies that were large enough to differentiate into layers and to melt deep inside. Their rocky outer layers may have been removed by impacts with other asteroids . A...
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Solar System - astronomy.
dwarf planets according to the IAU because they have rounded shapes from their own gravity but have not cleared their neighborhoods in space of other objects—bothorbit through the Kuiper Belt, a region beyond Neptune containing thousands of small icy bodies. Pluto and Eris are composed of layers of ice around a rocky core.Ceres qualifies as a dwarf planet because it is spherical but is found in the asteroid belt, a zone between the orbits of Mars and Jupiter that contains thousands of smallrocky...
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Planetary Science - astronomy.
III ORIGINS AND COMPOSITIONS OF PLANETS Astronomers believe that planetary systems are formed of elemental materials that were created in the interiors of giant stars. Some of this material comes from giantstars that shed material into space as they age. Most of the matter to form planets, however, comes from stars that explode as supernovas and spread debris enrichedwith the heavier chemical elements into space. According to the currently accepted views, the most likely first stage in the evo...
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Native American Art
I
INTRODUCTION
Native American Art, the visual works crafted by indigenous people of North America, starting after their arrival on the continent thousands of years ago and continuing
until the present.
artists in the Ohio area cut delicate flat forms from sheets of mica in the shape of birds, human figures, and large hands. They also carved quite natural-looking birdsand animals on stone platform pipes. These figures sat on the pipe’s flat base, or platform, and on some pipes they were part of the pipe bowl. Prominent people ofthese cultures were buried with a wealth of ornaments, such as jewelry of shells and copper, and headdresses elaborated with animal forms. The period of Mississippian cu...
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La «Sun Belt» des États-Unis
connu la plus forte croissance en pourcentage, ce sont en fait les Etats littoraux qui ont absorbé l'essentiel du croît démographique (40% de l'accroissement total de la population américaine pour_ la Californie, le Texas et la Floride réunis de 1970 à 1980 !). La Californie est l'Etat le plus peuplé de l'union avec plus de 26 millions d'habitants. 2. Il existe toutefois des différences de comportements démographiques au sein de la «Sun Belt »:...
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Space Exploration - astronomy.
to produce 250,000 newtons (56,000 lb) of thrust. The Germans launched thousands of V-2s carrying explosives against targets in Britain and The Netherlands. Whilethey did not prove to be an effective weapon, V-2s did become the first human-made objects to reach altitudes above 80 km (50 mi)—the height at which outer spaceis considered to begin—before falling back to Earth. The V-2 inaugurated the era of modern rocketry. A2 Early Artificial Satellites During the years following World War II, the...
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Neptune (planet) - astronomy.
The gaseous atmosphere of Neptune contains hydrogen, helium, and about 3 percent methane. It extends about 5,000 km (about 3,000 mi) above the planet’s ocean.Light reflected from Neptune’s deep atmosphere is blue, because the atmospheric methane absorbs red and orange light but scatters blue light. In 1998 astronomersalso identified molecules of methyl in Neptune’s atmosphere. Methyl molecules each contain one carbon atom and three hydrogen atoms. Methyl molecules are knownas hydrocarbon radical...
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Pluto - astronomy.
depended on how Pluto was classified. The status of Pluto drew world attention in 2006 when the official body that governs the naming of astronomical objects, the International Astronomical Union (IAU),voted for an official definition of the term planet . According to the standards adopted, a “classical planet” must orbit the Sun, must have a rounded shape from effects of its own gravity, and must be the dominant object in its region of space, having cleared the neighborhood of its orbit of oth...
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Mississippi - geography.
The climate of Mississippi is characterized by long, hot, and humid summers and generally mild winters. The higher lands in the northeast are usually cooler than otherareas of the state. D1 Temperature Average January temperatures range from about 6° C (about 42° F) in northeastern Mississippi to about 12° C (about 54° F) along the Gulf Coast. No part of the stateis entirely free from freezing temperatures, but prolonged periods of extreme cold rarely occur. Temperatures more than 15° C (30° F)...
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Mississippi - USA History.
The climate of Mississippi is characterized by long, hot, and humid summers and generally mild winters. The higher lands in the northeast are usually cooler than otherareas of the state. D1 Temperature Average January temperatures range from about 6° C (about 42° F) in northeastern Mississippi to about 12° C (about 54° F) along the Gulf Coast. No part of the stateis entirely free from freezing temperatures, but prolonged periods of extreme cold rarely occur. Temperatures more than 15° C (30° F)...
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Comet - astronomy.
may exceed the planet Jupiter in size, however. Observations from telescopes on Earth and in space indicate that most of the gases in the coma and tail of a comet are fragmentary molecules, or radicals, of the mostcommon elements in space: hydrogen, carbon, nitrogen, and oxygen. The radicals, for example, of CH, NH, and OH may be broken away from the stable molecules CH 4 (methane), NH 3 (ammonia), and H 2O (water), which may exist as ices or more complex, very cold compounds in the nucleus. Al...
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Alberta - Geography.
C Climate Except for the mountain areas, summers throughout the province are quite warm. Winters are long and extremely cold. In July, average daily temperatures range fromabout 16°C (about 60°F) along the northern boundary to about 21°C (about 70°F) in the south. In the extreme southeastern section of the province, temperatures of43°C (110°F) have been recorded. In January, average daily temperatures range from about -14°C (about 6°F) at Grande Prairie to about -9°C (about 16°F) atCalgary. Tem...
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Alberta - Canadian History.
C Climate Except for the mountain areas, summers throughout the province are quite warm. Winters are long and extremely cold. In July, average daily temperatures range fromabout 16°C (about 60°F) along the northern boundary to about 21°C (about 70°F) in the south. In the extreme southeastern section of the province, temperatures of43°C (110°F) have been recorded. In January, average daily temperatures range from about -14°C (about 6°F) at Grande Prairie to about -9°C (about 16°F) atCalgary. Tem...
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Premier pays scandinave ayant adhéré à la Communauté
européenne, riche, stable,
croissance démographique est quasiment nulle à cause d'une très basse natalité, et la population, essentiellement urbaine, vieillit. Complétez votre recherche en consultant : Les corrélats danois Les livres Danemark - vue de Copenhague, page 1377, volume 3 Danemark - la « vieille ville » (Den Gamble By), à Århus, page 1377, volume 3 La vie économique. Nation à haut niveau de vie, avec un système très évolué de protection sociale, le Danemark a toutefois un marché intérieur étroit, d'où...
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Diving (underwater).
compensator (or control) device (BCD or BC), which the diver wears as a vest. By adding air to the BCD, the diver becomes more buoyant and rises. By releasing air,the diver becomes less buoyant and sinks. With minor adjustments of air, the diver can achieve neutral buoyancy. A third hose attaches to pressure gauges that diversuse to monitor how much air remains in the tank. A fourth hose attaches to a backup breathing device called an alternate air source, or octopus. Divers also wear a belt w...
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Europe - geography.
movement of a segment of the Earth’s crust against the stable shield during the Caledonian orogeny (about 500 to 395 million years ago) raised the mountains of Ireland,Wales, Scotland, and western Norway. Subsequent erosion has rounded and worn down these mountains in the British Isles, but the peaks of Norway still reach 2,472 m(8,110 ft). The second major geological region, a belt of sedimentary materials, sweeps in an arc from southwestern France northward and eastward through the Low Countri...
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Europe .
D Vegetation Although much of Europe, particularly the west, was originally covered by forest, the vegetation has been transformed by human habitation and the clearing of land.Only in the most northerly mountains and in parts of north central European Russia has the forest cover been relatively unaffected by human activity. On the otherhand, a considerable amount of Europe is covered by woodland that has been planted or has reoccupied cleared lands. The largest vegetation zone in Europe, cuttin...
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Europe - Geography.
D Vegetation Although much of Europe, particularly the west, was originally covered by forest, the vegetation has been transformed by human habitation and the clearing of land.Only in the most northerly mountains and in parts of north central European Russia has the forest cover been relatively unaffected by human activity. On the otherhand, a considerable amount of Europe is covered by woodland that has been planted or has reoccupied cleared lands. The largest vegetation zone in Europe, cuttin...
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L'organisation des villes américaines
financières (la Bourse à New York), les pouvoirs de décision politique (la Maison Blanche à 'Wctshington OC) et les organismes internationaux (l'ONU à New York). ® Les « suburbs » : des banlieues exte nsibles Les suburbs se situent à la périphérie des centres-villes, autour des axes autoroutiers et s'ordonnent autour de quartiers pavillonnaires, de centres commerciaux et de pôles de haute technologie. Ce phénomène d'extension des banlieues am...
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Manitoba - Geography.
E Plant Life Forests cover 66 percent of Manitoba. The main forest area is divided into the boreal forest and the mixed-wood forest. The boreal, or northern, forest containsconiferous (cone-bearing) trees, especially white and black spruce, balsam fir, and jack pine. South of the boreal forest is the mixed-wood forest, which contains conifers as well as such deciduous trees as white birch, aspen, poplar, and Manitoba maple. Prairie land is found in the southwest, where the natural vegetation i...
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Manitoba - Canadian History.
E Plant Life Forests cover 66 percent of Manitoba. The main forest area is divided into the boreal forest and the mixed-wood forest. The boreal, or northern, forest containsconiferous (cone-bearing) trees, especially white and black spruce, balsam fir, and jack pine. South of the boreal forest is the mixed-wood forest, which contains conifers as well as such deciduous trees as white birch, aspen, poplar, and Manitoba maple. Prairie land is found in the southwest, where the natural vegetation i...
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Texas - geography.
D Climate Eastern Texas has a humid subtropical climate, while a semiarid low latitude climate prevails in central areas, and an arid low latitude climate in the extreme west. Alongthe coast the climate is much milder, with fewer extremes in temperatures. Hurricanes sometimes hit the coastal areas of Texas from late July through September, andtornadoes are common in north-central Texas in April and May. D1 Temperature Summers are hot throughout the state, and temperatures exceeding 35°C (95°F)...
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Texas - USA History.
D Climate Eastern Texas has a humid subtropical climate, while a semiarid low latitude climate prevails in central areas, and an arid low latitude climate in the extreme west. Alongthe coast the climate is much milder, with fewer extremes in temperatures. Hurricanes sometimes hit the coastal areas of Texas from late July through September, andtornadoes are common in north-central Texas in April and May. D1 Temperature Summers are hot throughout the state, and temperatures exceeding 35°C (95°F)...
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LA LOCALISATION DES PRINCIPAUX FOYERS INDUSTRIELS AUX ÉTATS-UNIS ET SES FACTEURS DANS LES ANNEES 80
A partir des années 70, le Manufacturing belt montre une croissance industrielle plus lente. La crise de 75 provoqueune hausse brutale du chômage qui, dans les états du Nord-Est, Illinois, Pennsylvanie, Ohio, Michigan, dépasse 12% et peut atteindre 20 à 25 % de la population active.Le tissu industriel ancien souffre de vieillissement. Les investissements stagnent. Des secteurs jadis florissants sonten grande difficulté. Faillites et licenciements se multiplient dans l'automobile (la région de De...
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Alabama (state) - geography.
indentations along the coast are measured, the state’s shoreline is 977 km (607 mi) long. It includes the shores of Mobile Bay, an inlet 56 km (35 mi) long at the mouthof the Mobile River. Barrier beaches partly block the entrance to the bay, leaving narrow openings on either side of Dauphin Island. Dauphin and other islands alongAlabama’s coast west of Mobile Bay are separated from the mainland by Mississippi Sound. D Climate Alabama has a humid subtropical climate, with short, relatively mild...
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Alabama (state) - USA History.
indentations along the coast are measured, the state’s shoreline is 977 km (607 mi) long. It includes the shores of Mobile Bay, an inlet 56 km (35 mi) long at the mouthof the Mobile River. Barrier beaches partly block the entrance to the bay, leaving narrow openings on either side of Dauphin Island. Dauphin and other islands alongAlabama’s coast west of Mobile Bay are separated from the mainland by Mississippi Sound. D Climate Alabama has a humid subtropical climate, with short, relatively mild...
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Zambia - country.
The Livingstone Museum, at Livingstone, has a collection relating to the archaeology and natural history of southern Africa. The Institute for African Studies of theUniversity of Zambia publishes studies relating to central Africa. IV ECONOMY The wealth of Zambia is based largely on mining in the rich copper belt, and downturns in copper prices have severely damaging economic consequences. Someprocessing and manufacturing has been started since independence, and during the 1970s attempts were...
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Geology.
terminology. Today the geologic time scale is generally agreed upon and used by scientists around the world, dividing time into eons, eras, periods, and epochs. Everyfew years, the numerical time scale is refined based on new evidence, and geologists publish an update. Geologists use several methods to determine geologic time. These methods include physical stratigraphy, or the placement of events in the order of their occurrence,and biostratigraphy, which uses fossils to determine geologic time...
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Michigan - geography.
The interior location of Michigan in the northern part of North America results in a continental climate, characterized by four definite seasons with moist, mild to hotsummers and snowy, cold winters. Winds off of Lakes Michigan and Superior in winter create heavy snow accumulations in nearby areas. The tempering effects of LakeMichigan account for the presence of the state’s famous fruit-growing belt along the lake’s shore. Since the water is colder than the land in spring, the westerly windspa...
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Michigan - USA History.
The interior location of Michigan in the northern part of North America results in a continental climate, characterized by four definite seasons with moist, mild to hotsummers and snowy, cold winters. Winds off of Lakes Michigan and Superior in winter create heavy snow accumulations in nearby areas. The tempering effects of LakeMichigan account for the presence of the state’s famous fruit-growing belt along the lake’s shore. Since the water is colder than the land in spring, the westerly windspa...
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Canada.
Six general landform regions are distinguishable in Canada: the Appalachian Region, the Great Lakes and St. Lawrence Lowlands, the Canadian Shield, the Great Plains,the Canadian Cordillera, and the Canadian Arctic Archipelago. B1 Appalachian Region and Great Lakes and St. Lawrence Lowlands Eastern Canada consists of the Appalachian Region and the Great Lakes and St. Lawrence Lowlands. The Appalachian Region embraces Newfoundland Island, NovaScotia, New Brunswick, Prince Edward Island, and the G...
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Canada - country.
Six general landform regions are distinguishable in Canada: the Appalachian Region, the Great Lakes and St. Lawrence Lowlands, the Canadian Shield, the Great Plains,the Canadian Cordillera, and the Canadian Arctic Archipelago. B1 Appalachian Region and Great Lakes and St. Lawrence Lowlands Eastern Canada consists of the Appalachian Region and the Great Lakes and St. Lawrence Lowlands. The Appalachian Region embraces Newfoundland Island, NovaScotia, New Brunswick, Prince Edward Island, and the G...
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Canada - Canadian History.
Six general landform regions are distinguishable in Canada: the Appalachian Region, the Great Lakes and St. Lawrence Lowlands, the Canadian Shield, the Great Plains,the Canadian Cordillera, and the Canadian Arctic Archipelago. B1 Appalachian Region and Great Lakes and St. Lawrence Lowlands Eastern Canada consists of the Appalachian Region and the Great Lakes and St. Lawrence Lowlands. The Appalachian Region embraces Newfoundland Island, NovaScotia, New Brunswick, Prince Edward Island, and the G...
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Les mutations de l'espace industriel des USA
LES MUTATIONS DE L'ESPACE INDUSTRIEL 1. TJPOlolle- "slono Industrielles -La rtg;cMls des 1 n et: 2 e ft.6volutions industrielles Manu(«uirin( Bd! Sud-&t,...,..i;..- • R'ck>s d'industries de po;me [I] Industrialisation r6cwtte du Vieux Sud 8 ReYitaMation par les ........... de po;me O Cemres isol& d'indusaies de haute i.chnolott• 2. Les facteun des mutations de l'espace industriel • Métropole à - mondial 0 HWopole à r61e ........ -+ Déconcentration de l'ind...
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1, a' connaitre
Mots ces
A
FAÇADE MARITIME
SUN BELT
Espace littoral
Région de climat subtropical ou médi
terranéen s'étendant...
1, a' connaitre Mots ces A FAÇADE MARITIME SUN BELT Espace littoral Région de climat subtropical ou médi terranéen s'étendant de la Californie à la Floride. Depuis les années 1960, cette région attire les retraités à la re cherche d'un espace de vie agréable, mais aussi les entreprises high-tech et les cadres ou encore les industries délocalisées à la recherche de main d'œuvre moins chère. d'échanges et de pro duction (comportant de grands orga nismes urbains et portuaires) jouant le r...
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Valley.
Except in mountainous terrain, rivers are almost always flanked by floodplains. Floodplains are flat wide deposits of alluvium, river-deposited sediment, on either side of the river channel. During floods, a river overflows its banks and spreads out the sediment near the river to form a floodplain. Floodplains of large rivers, such as thoseof the Mississippi River, can be flat areas tens of kilometers across. River channels migrate back and forth across their floodplains as alluvium is repeate...
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Valley - Geography.
Except in mountainous terrain, rivers are almost always flanked by floodplains. Floodplains are flat wide deposits of alluvium, river-deposited sediment, on either side of the river channel. During floods, a river overflows its banks and spreads out the sediment near the river to form a floodplain. Floodplains of large rivers, such as thoseof the Mississippi River, can be flat areas tens of kilometers across. River channels migrate back and forth across their floodplains as alluvium is repeate...