132 résultats pour "hundred"

• Renaissance Art and Architecture I INTRODUCTION Renaissance Composition During the Renaissance (15th and 16th centuries) artists discovered new ways to help them create more realistic and compelling images.

  with reliefs, had been familiar for centuries. A Early Renaissance Sculpture Ghiberti’s Gates of ParadiseThe Gates of Paradise are bronze doors created by Italian Renaissance sculptor Lorenzo Ghiberti between 1425 and 1452for the east entrance to the baptistery of the Florence Cathedral in Italy. This detail, showing Isaac and Esau, is from oneof the doors' ten panels, each of which illustrates a story from the Bible. Ghiberti endowed the scenes with volume, depth,and movement, and helped initi...

• Supernova - astronomy.

  The term hypernova has been proposed for an extremely massive core-collapse supernova—possibly more than 100 times the mass of the Sun. A hypernova is thought to form a black hole. Just before it explodes, a hypernova may release a huge burst of gamma rays in a jet from the rotating black hole at its center. These jets mayexplain the so-called long gamma-ray bursts detected by astronomers. According to some researchers, massive stars with over 40 solar masses may sometimescollapse directly int...

• Jordan (country) - country.

  whom belong to the Greek Orthodox Church, make up about 4 percent of the population. Islam is the state religion and Arabic the official language. C Education Jordan has made significant strides in education in recent decades, despite the influx of hundreds of thousands of refugees and the very large share of the nationalbudget assigned to the armed forces. Public education is free and compulsory between the ages of 6 and 15. At the secondary level, about 85 percent of the malechildren and 87 p...

• Shark - biology.

  Sharks have two-chambered hearts that are relatively small compared to the rest of their bodies. Blood flows from the heart to the gills, where it collects oxygen fromwater and then distributes it to the other organs and tissues. The small heart produces weak blood pressure, and many sharks must swim continuously to create themuscular contractions needed to circulate blood throughout their bodies. Most sharks are cold-blooded—that is, they do not generate heat by digesting food. Instead, the bod...

• Slavery in the United States - U.

  tripled, from about 1.2 million to almost 4 million in 1860. The natural growth of the slave population meant that slavery could survive without new slave imports. Natural population growth also hastened the transition from an African to an African American slave population. By the 1770s, only about 20 percent of slaves in thecolonies were African-born, although the concentration of Africans remained higher in South Carolina and Georgia. After 1808 the proportion of African-born slavesbecame tin...

• George Herbert Walker Bush.

  Lebanon. More troubling was the disclosure that agents operating under direct White House supervision used profits from the arms sales to buy weapons for thecontras, a group of anti-government Nicaraguan rebels, despite an explicit congressional ban on such aid. Bush later claimed that he opposed the arms-for-hostagesdeal, but offered little evidence to back his claims ( see Iran-Contra Affair). C 1988 Presidential Election While the Reagan-Bush program helped produce prosperity for the wealth...

• George Herbert Walker Bush - USA History.

  Lebanon. More troubling was the disclosure that agents operating under direct White House supervision used profits from the arms sales to buy weapons for thecontras, a group of anti-government Nicaraguan rebels, despite an explicit congressional ban on such aid. Bush later claimed that he opposed the arms-for-hostagesdeal, but offered little evidence to back his claims ( see Iran-Contra Affair). C 1988 Presidential Election While the Reagan-Bush program helped produce prosperity for the wealth...

• On the road

• Uruguay (country) - country.

  Freedom of religion is guaranteed by the constitution of Uruguay. Three-quarters of the people belong to the Roman Catholic Church. There are also sizable Protestantand Jewish congregations. The official language is Spanish, which in Uruguay has been influenced by Italian vocabulary and pronunciation. C Education Uruguay has one of the highest rates of literacy in Latin America, at 98.2 percent of the adult population. Six years of primary education is compulsory, and Uruguay isone of the few n...

• Telecommunications.

  commonly referred to as wireless communications, use technologies such as cordless telephones, cellular radio telephones, pagers, and satellites. Wirelesscommunications offer increased mobility and flexibility. In the future some experts believe that wireless devices will also offer high-speed Internet access. C Wires and Cables Wires and cables were the original medium for telecommunications and are still the primary means for telephone connections. Wireline transmission evolved fromtelegraph...

• Rain Forest.

  dropped into the heart of the forest by helicopters. Suspended from the crane’s long, movable arm is a large gondola that functions as a mobile treetop laboratory.Moving from tree to tree, forest researchers collect specimens, conduct experiments, and observe life in the canopy frontier. The highest stratum of the rain forest is made up of the emergent trees, those individuals that stick up above the forest canopy. Emergents, which do not form acontinuous layer, are usually the giants of the for...

• John F.

  by the United States, was unable to withstand the advance of Communist forces under Mao Zedong (Mao Tse-tung). By the end of 1949 government troops had beenoverwhelmingly defeated, and Chiang led his forces into exile on Taiwan. The triumphant Mao formed the People’s Republic of China. Truman’s critics, includingKennedy, charged that the administration had failed to support Chiang Kai-shek against the Communists. Kennedy easily won reelection to Congress in 1948 and 1950. In 1952 he decided to r...

• John F.

  by the United States, was unable to withstand the advance of Communist forces under Mao Zedong (Mao Tse-tung). By the end of 1949 government troops had beenoverwhelmingly defeated, and Chiang led his forces into exile on Taiwan. The triumphant Mao formed the People’s Republic of China. Truman’s critics, includingKennedy, charged that the administration had failed to support Chiang Kai-shek against the Communists. Kennedy easily won reelection to Congress in 1948 and 1950. In 1952 he decided to r...

• Earthquake.

  III CAUSES Most earthquakes are caused by the sudden slip along geologic faults. The faults slip because of movement of the Earth’s tectonic plates. This concept is called theelastic rebound theory. The rocky tectonic plates move very slowly, floating on top of a weaker rocky layer. As the plates collide with each other or slide past eachother, pressure builds up within the rocky crust. Earthquakes occur when pressure within the crust increases slowly over hundreds of years and finally exceeds...

• Radio.

  signal, such as a musical note. This form of modulation, AM, is used in many radiotelephony services including standard radiobroadcasts. AM is also employed for carriercurrent telephony, in which the modulated carrier is transmitted by wire, and in the transmission of still pictures by wire or radio. See Broadcasting, Radio and Television. In FM the frequency of the carrier wave is varied within a fixed range at a rate corresponding to the frequency of a sound signal. This form of modulation, p...

• Tajikistan - country.

  by more than 100 percent due to a high birth rate and improvements in medical care. During the early 1990s, however, the growth rate began to decline due to civilwar and emigration. A Ethnic Groups and Languages Tajiks constitute the largest ethnic group in Tajikistan, making up about 65 percent of the population. The peoples who live in Gorno-Badakhshan, located in the Pamirs,are classified as Tajiks, although their languages and customs are distinct. The largest minority group in the country...

• Native American Art.

  folding, braiding or weaving, could also be sewn onto the hide. The production of decorated clothing and bags increased after contact with Europeans as a greater variety of textiles and other materials became available throughtrade. Imported glass beads inspired native women, who quickly adapted quillwork techniques for the creation of beaded apparel. European curvilinear and floraldesigns of the 19th century proved as meaningful for the native women who worked with them as they were for the non...

• Holocaust I INTRODUCTION Holocaust, the almost complete destruction of Jews in Europe by Nazi Germany and its collaborators during World War II (1939-1945).

  relation to the Jews. He claimed that the Jews had achieved economic dominance and the ability to control and manipulate the mass media to their own advantage. Hewrote of the need to eradicate their powerful economic position, if necessary by means of their physical removal. IV UNIQUENESS OF NAZI ANTI-SEMITISM The linking of anti-Semitic accusations to race struggle is what made Nazism so genocidal. The Nazis believed the Jews were responsible for what they regarded as thedegeneracy of modern...

• Holocaust .

  relation to the Jews. He claimed that the Jews had achieved economic dominance and the ability to control and manipulate the mass media to their own advantage. Hewrote of the need to eradicate their powerful economic position, if necessary by means of their physical removal. IV UNIQUENESS OF NAZI ANTI-SEMITISM The linking of anti-Semitic accusations to race struggle is what made Nazism so genocidal. The Nazis believed the Jews were responsible for what they regarded as thedegeneracy of modern...

• China - country.

  North China lies between the Mongolian Steppe on the north and the Yangtze River Basin on the south. It stretches west from the Bo Hai gulf and the Yellow Sea to theeastern edge of the Tibetan Plateau. Administratively, North China includes Beijing and Tianjin municipalities; Shandong and Shanxi provinces; most of Hebei, Henan,and Shaanxi provinces; and portions of Ningxia Hui Autonomous Region and of Jiangsu, Anhui, and Gansu provinces. Humans have lived in the agriculturally rich region of Nor...

• France - country.

  In both the Paris and Aquitaine basins, fertile soils derived from limestone and wind-deposited dust, called loess, have supported prosperous agriculture since ancienttimes. Other lowlands in France are scattered and relatively small. They include the Alsace Plain in the east, bordering Germany, the valley of the Rhône River in thesoutheast, and the Languedoc Plain along the Mediterranean coast. A2 Uplands France contains several regions of uplands, the worn down remains of ancient mountain sys...

• Greece - country.

  minerals, such as chromium, copper, uranium, and magnesium, are relatively small. Greece’s small petroleum deposits, located under the Aegean Sea near the island ofThásos, are rapidly being depleted. There are no significant reserves of natural gas. Greece’s forests, probably abundant in ancient times, have been significantly depleted. Subsequent soil erosion has made reforestation efforts difficult. Although muchof Greece’s soil is rocky and dry, the country’s mountains are interspersed with sm...

• President of the United States.

  Democrats and Republicans—select delegates to attend their party conventions. Primary voters and caucus participants choose delegates who will support their favoredcandidate at the convention. The party conventions, held in the summer before the November general election, formally nominate the winner of the primaries andcaucuses. Would-be candidates crisscross the states that hold the earliest primaries, especially New Hampshire, which holds the country’s first primary, usually in mid-February....

• Star (astronomy) - astronomy.

  absorbing the missing colors of light. For example, the set of dark lines made by hydrogen includes a dark red line, the set of dark lines made by sodium includes a pairof dark yellow lines, and the set of dark lines made by iron includes lines of nearly every color. Each element in the gaseous outer layer of a star produces its ownparticular pattern of dark spectrum lines, depending on the temperature and pressure of the gas. Astronomers have observed spectrum lines, or spectra, for hundredsof...

• Midnighters

• Native Americans of Middle and South America.

  A line that snakes across central Mexico near the Tropic of Cancer forms the northern boundary of Mesoamerica; north of this line rainfall sharply declines and theclimate is much drier. The ancient civilizations of Mesoamerica all arose and developed in the area between this line and the Guatemalan highlands far to the south. Richvolcanic soils are found throughout much of the region. A2 People and Languages Mesoamerica was a great melting pot, home to many peoples and interrelated cultures. In...

• The Alchimist

• Native Americans of North America.

  addition to smallpox and measles, explorers and colonists brought a host of other diseases: bubonic plague, cholera, typhoid fever, scarlet fever, pleurisy, mumps,diphtheria, pneumonia, whooping cough, malaria, yellow fever, and various sexually transmitted infections. Despite the undisputed devastation wreaked on Indian populations after European contact, native populations showed enormous regional variability in their response todisease exposure. Some peoples survived and, in some cases, even...

• Native Americans of North America - Canadian History.

  addition to smallpox and measles, explorers and colonists brought a host of other diseases: bubonic plague, cholera, typhoid fever, scarlet fever, pleurisy, mumps,diphtheria, pneumonia, whooping cough, malaria, yellow fever, and various sexually transmitted infections. Despite the undisputed devastation wreaked on Indian populations after European contact, native populations showed enormous regional variability in their response todisease exposure. Some peoples survived and, in some cases, even...

• Alaska - geography.

  depression surrounded by highlands and have the coldest winter and hottest summer temperatures in Alaska. Once the Kuskokwim River passes through theKuskokwim Mountains, it forms the southern edge of a vast lake-studded alluvial plain bounded on the north by the Yukon River. This water-logged lowland is a majorsummer nesting area for birds. Fairbanks is the major city in this region, while Fort Yukon is the major community in the Yukon Flats and Bethel the largest settlementon the Lower Kuskokwi...

• Alaska - USA History.

  depression surrounded by highlands and have the coldest winter and hottest summer temperatures in Alaska. Once the Kuskokwim River passes through theKuskokwim Mountains, it forms the southern edge of a vast lake-studded alluvial plain bounded on the north by the Yukon River. This water-logged lowland is a majorsummer nesting area for birds. Fairbanks is the major city in this region, while Fort Yukon is the major community in the Yukon Flats and Bethel the largest settlementon the Lower Kuskokwi...

• United Kingdom - country.

  B Natural Regions and Topography The island of Great Britain can be divided into two major natural regions—the highland zone and the lowland zone. The highland zone is an area of high hills andmountains in the north and west. The lowland zone in the south and east consists mostly of rolling plains. The zones are divided by an imaginary line running throughEngland from the River Exe on the southwest coast to the mouth of the River Tees on the northeast coast. The lowland zone has a milder climat...