title: Bicycle

text: In the 1860s, French inventors added pedals to the front wheel. However, it took a lot of effort to turn the pedals. Later inventors made bikes out of metal only, and made the front wheel very big, giving higher speed. This design was called the penny-farthing bicycle. However, it was difficult to ride, since it could fall easily and the rider would fall far.


title: Bicycle

text: Several improvements were made in the 1880s and '90s. In 1885, the safety bicycle was invented. This had two wheels the same size so that the rider could sit at a lower height. It was called the safety bicycle because it much easier to ride than the penny-farthing. When stopping, the rider can simply put down a foot instead of completely dismounting. Instead of pedaling and steering with the front wheel, the safety bicycle steers with the front wheel while the pedals turn the back wheel using a chain. Brakes operated by hand levers on some bikes also increased safety.


title: Bicycle

text: In 1888, Scottish inventor John Boyd Dunlop re-invented a type of tire which was filled with air. This made safety bicycles more comfortable. Soon, the freewheel was invented. This was a device inside the hub of the back wheel that allowed the wheel to spin even if the rider wasn't pedaling. However, this meant the rider could no longer stop the bike by backpedaling. As a result, better hand brakes were invented, and a different type of brake which could stop the bike if the pedals were turned backwards. Later inventions included better brakes, and gears which made cycling over hills much easier. During this time the bicycle became very popular.


title: Bicycle

text: Basic components common to most bikes include a seat, pedals, gearing, handlebar, wheels, and brakes, all mounted on a frame. The majority also have a gear shifter. The cyclist's feet push the pedals to make them go around in circles, which moves the chain, which turns the back wheel of the bike to make the bike move forwards. The front wheel is connected to the handlebar, so turning the handlebar from side to side swivels the front wheel which steers the bike.


title: Bicycle

text: Many thousands of people are hurt every year in bicycle accidents, and hundreds die. Careful riding helps prevent accidents. When riding on streets, it is safest to ride on the same side of the street that cars drive (which would mean riding on the right side of the road in countries where people drive on the right side of the road, and riding on the left in countries where people drive on the left). To avoid hitting people, riders must obey signs that say "no bicycling", even if it does not seem to make sense at the time. Low light makes bicycle lighting important. It may not be safe to ride when it is dark. Riders wear reflective clothing to be safer in low light. Wearing a helmet makes bicycle riding safer. Wearing a helmet does not mean that somebody cannot be hurt if they crash their bicycle, but it makes being hurt less likely. Some bicycles have bells or horns that the rider can use to warn other people that they are riding by them.


title: Bicycle

text: Many places have a bicycle path linking houses with shops, schools and stations. These make bicycling safer, letting cyclists stay away from busy motor traffic on dangerous roads.


title: Wheat

text: Wheat (Genus: "Triticum") is a cereal grain. People eat it most often in the form of bread. It is a kind of grass whose fruit is a "head of wheat" with edible seeds. It was first grown in the Levant, a region of the Near East. Now it is cultivated worldwide.


title: Wheat

text: World trade in wheat is greater than for all other crops combined. Globally, wheat is the leading source of vegetable protein in human food. It has a higher protein content than other major cereals such as maize (corn) or rice. In terms of total production, it is second to rice as the main human food crop and ahead of maize (maize is used more for animal feeds). Almost 800,000,000 tonnes are harvested every year.


title: Wheat

text: Wheat was a key factor enabling the emergence of city-based societies at the start of civilization. It was one of the first crops that could be easily cultivated on a large scale, and its seeds could be stored for long periods in a dry climate. Wheat helped the growth of city-states in the Fertile Crescent, including the Babylonian, Assyrian and persian empires.


title: Wheat

text: Wheat grain is a staple food used to make flour for leavened, flat and steamed breads, biscuits, cookies, cakes, breakfast cereal, pasta, noodles, couscous. It can also be fermented to make ethanol, for alcoholic drinks, or biofuel.


title: Wheat

text: An allergy to wheat (mostly from its gluten) can cause coeliac disease, which makes the sufferer have diarrhoea if they eat any food containing wheat.


title: Wheat

text: The wheat plant has long, slender leaves, stems that are hollow in most types of wheat plants, and heads that have many kinds of flowers, from 20 to 100. The flowers are grouped together in spikelets. Each spikelet has two to six flowers. In most spikelets, two or three of the flowers become fertilized, and this makes them produce the grains used for food.


title: Wheat

text: All cultivated wheats have more than one normal diploid set of chromosomes. The increases in chromosome sets occurs naturally at a low rate. Because they have more chromosomes, their ears of wheat are larger. All man did was to select the plants with extra fat ears of wheat when they occurred. Now a whole range of cultivated wheats are available. These are just a few:


title: Wheat

text: Emmer wheat ("Triticum dicoccum"), or 'hulled wheat', is a type of "awned" wheat. It was one of the first crops domesticated in the Near East. It was widely cultivated in the ancient world, but is now a relict crop in mountainous regions of Europe and Asia.


title: Wheat

text: In the wild, the awns of emmer wheat spikelets help them dig into the soil. With humidity in the night, the awns of the spikelet become erect and draw together, and in the process push the grain into the soil. During the day, the humidity drops and the awns slacken back again. During the course of days and nights, the awns' pumping movements drill the spikelet as much as an inch into the soil.


title: Wheat

text: Einkorn wheat is one of the earliest cultivated forms of wheat, ("Triticum monococcum"). Grains of wild einkorn have been found in Paleolithic sites of the Fertile Crescent. It was first domesticated about 7500 BC (~9000 years ago), in the early Neolithic period. Evidence from DNA suggests einkorn was domesticated in southeast Turkey, where a number of early farming villages have been found. Its cultivation decreased in the Bronze Age, and today it is a relic crop that is rarely planted. It has found a new market as a health food. It is still used for bulgur (cracked wheat) or as animal feed, in mountainous areas of France, Libya, former Yugoslavia, Turkey and other countries. It often survives on poor soils where other species of wheat fail.


title: Owl

text: Owls are birds in the order Strigiformes. There are 200 species, and they are all animals of prey. Most of them are solitary and nocturnal; in fact, they are the only large group of birds which hunt at night. Owls are specialists night-time hunters. They feed on small mammals such as rodents, insects, and other birds, and a few species like to eat fish as well.


title: Owl

text: As a group, owls are very successful. They are found in all parts of the world except Antarctica, most of Greenland, and some small islands.


title: Owl

text: An owl has a big head, flat face, hooked beak, short tail, and sharp talons, The wings of an owl are long. Owls have brown, gray, or white plumage with streaks or spots.


title: Owl

text: Owls have large eyes and holes for ears, a hawk-like beak, and a rather flat face. Most birds of prey have eyes on the sides of their heads, but the owl's eyes are facing forwards to help it see better in the dark. Their eyes are also fixed inside their sockets, so they have to turn their whole head to look at other things. Owls can rotate their heads and necks up to 270 degrees in both directions.


title: Owl

text: Owls are good at looking at things far from its eyes, but it cannot see anything clearly within a few centimeters of their eyes. Owls use small feathers on the beak and the feet that help it feel the prey it catches.


title: Owl

text: The owls' hunting depends on surprising its prey. Their most important adaptation is their almost silent flight. The feathers are soft, with fringes on the back edge, and the base of each is downy. This all muffles noise, and makes for silence. Also, they glide when coming in for the kill.


title: Owl

text: The dull colors of the owls' feathers make them less visible by camouflaging the owl. This helps them as they roost during the day.


title: Owl

text: Owls have fantastic hearing. The shape of the head helps slight sounds reach the ears. The feathers of the facial disc are arranged in order to increase sound delivered to the ears. Their ears are asymmetrical allowing the owl to locate a sound. They can hear a mouse move in the grass.


title: Owl

text: An owl's sharp beak and powerful talons allow it to kill its prey before swallowing it whole, unless it is too big. Owls usually regurgitate the parts of their prey that they cannot digest. These parts include bones, scales, and fur. Scientists who study the things that owls eat can get clues by studying the parts that the owl spit back out, called "owl pellets". These "owl pellets" are sold by supply companies to schools for use in the students' biology and ecology lessons.


title: Owl

text: Many animals store food during times of plenty to prepare for leaner times. Owls may store dead mice for winter.


title: Owl

text: Owls have special adaptations which help them swivel their heads 270 degrees. They have 14 neck vertebrae instead of our seven. Also, the big carotid arteries, instead of being on the side of the neck as in humans, are carried close to the centre of rotation just in front of the spine. So these arteries get much less twisting and stretching, and the potential for damage is greatly reduced. This arrangement is seen in other birds, but in owls the vertebral arteries – the vessels that travel through channels in the neck bones – are given extra space.


title: Owl

text: Owls also have wide parts in their carotid arteries just under the base of the skull. Researchers found these could dilate and fill with a reservoir of blood. "We believe this is kind of a new structure not really known before", said a researcher. "It's probably a way to pool blood and get some continuity of flow even if there is disruption below at the next level".


title: Books of the Bible

text: The Books of the Bible are the different sections of the Bible. Each book has a different name. Most of the time the book is named after the person who maybe wrote the book. Although that is not always the case. Different religions, and different denominations of Christianity, have different books or sections in the Bible. These different groups accept different books. These groups also use different names for the same books. The stories in the "Books of the Bible" are very similar for all religious groups. Some people use a trick and ideas to memorize the Bible.


title: Books of the Bible

text: Below, there is a list or table that compares the Books of the Bible in Judaism and in the Catholic, Protestant, Greek Orthodox, Slavonic Orthodox, Georgian, Armenian Apostolic, Syriac, and Ethiopian Churches. The table covers both the Old Testament and the New Testament. For a detailed discussion of the differences, see "Biblical canon".


title: Books of the Bible

text: The Eastern Orthodox, Oriental Orthodox, and Eastern Catholic churches may have small differences in the lists of books that they accept. If at least one Eastern church accepts a book, then that book is listed in this table. The Eastern churches accept all of the books that the Roman Catholic Church accepts.


title: Books of the Bible

text: If a table cell has an asterisk (*), it means that a book is used, but in a different order. Empty cells mean that the book is not used. These books are often called "apocrypha". This word is sometimes used specifically (and possibly negatively) to describe the books in the Catholic and Orthodox canon that are not in the Protestant Bible. Orthodox and Catholic Christians call these books "deuterocanonical", which means second canon.


title: Books of the Bible

text: Most Christian groups agree about the New Testament canon (the list of books in the New Testament) but some groups put books in a different order (place).


title: Books of the Bible

text: The Ethiopian Orthodox Church has a few other books in its canon (list of books): Jubilees, Book of Enoch, and The Rest of the Words of Baruch (4 Baruch).


title: Books of the Bible

text: The Peshitta does not have 2-3 John, 2 Peter, Jude, and Revelation, but Bibles of the modern Syriac Orthodox Church do have later translations of those books. They also have the Letter of Baruch (Baruch, is called a deuterocanonical book of the Bible). Today the Syrian Orthodox Church only uses lessons from the twenty-two books of Peshitta in its official lectionary (list of Church readings).


title: Books of the Bible

text: Third Epistle to the Corinthians was once part of the Armenian Orthodox Bible, but it is not in modern editions (printed versions).


title: Books of the Bible

text: The Anglican Church accepts the same order of books as the Vulgate (Catholic 16th Century) Bible. The 39 Articles (an Anglican list of doctrines or important beliefs) says that these Books of the Bible are Apocrypha:


title: Insolation

text: Insolation is derived from the words "incoming solar radiation". Insolation is specifically applied to radiation which is arriving at earth’s atmosphere first and then earth's surface. The heat is derived from solar energy, normally called solar radiation. Insolation is the solar radiation that reaches the earth's surface. It is measured by the amount of solar energy received per square centimetre per minute. Similarly, solar energy received by the earth is called insolation. It is the amount of incoming solar radiation that is received over a unit area of the earth’s surface. Solar energy received over the planet’s surface varies according to season, latitude, transparency of the atmosphere, and aspect or ground slope.


title: Insolation

text: The amount of insolation received on the earth’s surface is not uniform everywhere. It varies according to the place and time. When the tropical regions receive maximum annual insolation, it gradually decreases towards the poles. Insolation happens more in summers and less in winters. The major factors which influence the amount of insolation received are:


title: Insolation

text: At the top of the earth’s atmosphere, received insolation is expressed as the solar constant. It receives at the top of the atmospheric surface (thermopause) on a perpendicular plane to the solar beam. The average insolation received at the thermopause i.e.1368Wm2(Watt per squaremetre)energy(solar constant) is in the form of short wave. Thus, it is termed as solar constant for that mean distance from the sun. These solar constant is varying over 1 Wm2 by periodic disturbances and explosions in the solar surface basically related to sun spot. Sun spots are dark and cooler areas visible on the sun’s surface.The recent researches have shown that more and more energy is released when the sunpots are in large number.The number of sunspots also increases or decreases on a regular basis, creating a cycle of 11 years.


title: Insolation

text: Since the earth is a geoid resembling a sphere, the sun’s rays strike the surface at different angles at different places. This depends on the latitude of the place.The higher the latitude, the less is the angle they make with the surface of the earth.


title: Insolation

text: The area covered by the vertical rays is always less than the slant rays. If more area is covered, the energy gets distributed and the net energy received per unit area decreases. Moreover, the sun’s rays with small angle traverse more of the atmosphere than rays striking at a large angle.


title: Insolation

text: The length of the day determines the duration of sunlight which affects the amount of solar radiation received by the earth’s surface. The longer period of sunshine, greater the quantity of solar radiation will be received by a portion of earth.For example, at the equator the length of days and nights is 12 hours in all the months but the tropics of Arctic and Antarctic sunshine duration varies between 0 and 24. On the autumn and springe quinoxes (September 23and March 21 respectively),the sun is overhead at the equatorat noon.The night and day all over the earth are equal on these days and maximum amount of insolation is received at the equator, and the amount of insolation decreasing towards the poles.It is caused by vertical sunshine at equator but with increasing latitudes, the rays become more and more slanting. Therefore, poleward, the received energy keeps on declining.


title: Insolation

text: The earth is revolving around the sun in an elliptical orbit, resulting continuous change in the distance between sun and the earth on annual basis. It leads to seasonal variation in solar energy received by the earth.The mean distance between the earth and sun is about 149,600,000 kilometers(92,900,000 miles).When earth position is farthest(152 million km) from sun is known as ‘aphelion’ on July 4. It is perihelion(147 million km)occurs on January 3 each year which is the closest distance. During aphelion the northern hemisphere is facing the sun and therefore receives energy about 7 percent less than the perihelion (southern hemisphere).


title: Insolation

text: Atmosphere is not transparent for all the radiation coming from the sun because of different composition and layers. It is also one of the controlling factors of insolation to reach earth surface. The atmosphere is composed of gases, water vapour and particulate matters.The atmosphere is a mixture of gases,such as nitrogen(N), oxygen (O2), Argon, carbon dioxide, Neon (Ne), Helium (He), Methane (CH4), Krypton (Kr), Ozone (O3), Nitrous oxide (N2O), Hydrogen (H) and Xenon (Xe). The atmosphere also contains water vapour, water in the gaseous state.


title: Republic

text: A republic is a form of government that has no monarchy and no hereditary aristocracy. It originates from Rome. In 509 BC, the Romans overthrew the Roman Kingdom and established a republic, a government in which citizens elected representatives to rule on their behalf.


title: Republic

text: National sovereignty lies in the authority of the government, not in an emperor or monarch. The word "republic" comes from the Latin words res publica, meaning a "public thing". For example, the United States and India are republics. However, the United Kingdom and Canada are not republics since they have a monarch (King Charles III in both cases)


title: Republic

text: Countries with a king or other monarch and free elections is called a constitutional monarchy, not republics. A constitutional monarchy resembles a republic because the constitution has been amended to remove power from the monarch and install institutions conforming to a philosophy of republicanism. That includes the United Kingdom and the other Commonwealth realms, the Netherlands, Thailand, and countries in Scandinavia and elsewhere. What makes a republic different is that its laws are made and enforced without royal authority.


title: Republic

text: The head of state in a republic is generally a person who has been chosen by the citizens by direct election or by a group of elected representatives to act as the top representative of the people. In most republics, the head of state is called the president. In some countries, the president is elected and has a lot of political power. In others, the president does not hold much direct power but is important in the legal system for other reasons.


title: Republic

text: Sometimes, state is called a "republic" when its head is not called a "king". For example, the Roman Empire had an "emperor" and the Dutch Republic had a "stadholder", but they worked as hereditary monarchs.


title: Republic

text: Licchavi, in India, was the first republic in the 6th and 5th centuries BCE. The earliest republics that were much imitated later were Greek cities, for example democracy in Athens. The biggest difference from the other city-states was that people chose their leaders by voting or by lottery.


title: Storm

text: A storm is a violent meteorological phenomenon in which there is heavy rain, and wind due to moisture in the air. Hail and Lightning are also common in storms. More rarely, Tornadoes can occur in storms.


title: Storm

text: Hurricanes, typhoons, and tornadoes are, often, called storms too but they have special names because they are very, very strong. Storms are studied by scientists called meteorologists. The idea of shipping forecasts started with a concern to save ships from unexpected storms in the North Atlantic. A storm is associated with severe weather and may be marked by strong wind, thunder, lightning and heavy precipitation such as ice. Therefore, the knowledge of the weather condition is extremely important.


title: Storm

text: There are many varieties and names for storms: "icestorm", "blizzard", "snowstorm", "ocean-storm", "firestorm", etc. The storms called thunderstorms develop in hot, humid tropical areas like Mexico very frequently. The rising temperatures produce strong upward rising winds. These winds carry water droplets upwards, where they freeze, and fall down again. The swift movement of the falling water droplets along with the rising air create "lighting" and sound.


title: Intel Core i7

text: Intel Core i7 is a name that the company Intel uses for the computer processors it makes for high-end desktop and laptop computers and tablets. Intel uses this name for the fastest processors that they think will be used to build the most powerful consumer devices. The 'Core' part of the name, which refers to the processor's core, has been used by Intel since 2006, but the first Core i7 processor was released 3 years later in 2009.


title: Intel Core i7

text: There are different types of Core i7 processor. The name does not name a type. Instead, it is the name for all of the fast processors that Intel thinks should be sold to consumers. Intel uses two other "Core i-" names for its processors for consumers: "Core i5" and "Core i3." The "Core i5" processors are mostly as fast as i7 processors, but lack the Hyper Threading technology which allows each core to be used twice simultaneously giving the impression of doubling the cores.


title: Intel Core i7

text: Intel uses a different name, Xeon, for processors that Intel makes for "server" computers for businesses (and some rare laptops). Some of the "Core i7" processors are almost the same as some of the "Xeon" processors, but each of the Xeon processors is a little bit different than the "Core i7" processor, because a "server" computer is not the same as a consumer computer. Intel also makes other "Xeon" processors that are not the same as any "Core i7" processor. Unlike the Core i7, Xeon processors support ECC (error correcting) memory, and multiple CPUs on the same motherboard. However, Alder Lake processors have officially supported ECC memory if used with a W680 motherboard and ECC memory.


title: Exsanguination

text: Exsanguination is losing enough blood to cause death. A person does not have to lose all of their blood to exsanguinate. People can die from losing half to two-thirds of their blood.


title: Exsanguination

text: The average adult has about 4 to 6 liters of blood (9 to 12 US pints) in their body. The average man has more blood than the average woman, and people who weigh more or are taller than others have more blood. This means a person can die from losing 2 / to 4 liters of blood. To compare, this is five to eight times as much blood as people usually give in a blood donation.


title: Exsanguination

text: Children and babies have much less blood than adults, and can exsanguinate by losing much less blood than adults.


title: Exsanguination

text: "External" means "outside the body." External bleeding is visible - it can be seen outside the body. For example, a person who cuts their hand and has blood on their hand is having external bleeding.


title: Exsanguination

text: "Internal" means "inside the body." Internal bleeding cannot be seen, because it is inside the body. For example, a person who is bleeding into their brain because of a stroke is having internal bleeding.


title: Exsanguination

text: Sometimes, bleeding can be both internal and external. A person can exsanguinate from internal bleeding, external bleeding, or both.


title: Exsanguination

text: Exsanguination is usually caused by major blood vessels getting injured or breaking open. Smaller blood vessels bleed less, and bleed slower, so it is harder to exsanguinate if they are injured.


title: Exsanguination

text: Exsanguination can be caused by trauma (injuries). Out of all people who die from injuries, 30-40% die from exsanguination. Up to half of these people (33-56%) die before they even get to the hospital.


title: Exsanguination

text: Penetrating trauma (an injury where something breaks the skin) is one of the most common causes of exsanguination. This is especially true for gunshot wounds to places like the heart, chest, or head, which all have major blood vessels in them.


title: Exsanguination

text: Exsanguination is one of the most common causes of death in soldiers at war. It is usually caused by gunshot wounds, motor vehicle accidents, or explosions.


title: Exsanguination

text: If a person is losing blood very quickly (for example, from a broken aortic aneurysm), they will only be conscious for 20 seconds to a few minutes. If blood loss is slower, and the person does not get medical treatment, they may be conscious for a few hours. However, they will get more and more confused and tired as they lose more blood. Eventually the person will go into a coma because there is not enough blood left in their body to bring oxygen to their brain. Finally their heart will stop and they will die.


title: Exsanguination

text: Doctors call exsanguination a syndrome (a group of symptoms), because it causes so many problems in the body.


title: Exsanguination

text: Coagulopathy means that the blood no longer clots normally. When a person loses blood, they also lose the platelets and blood-clotting proteins the blood carried. These platelets and proteins make the blood clot. If a person loses too much blood, they will not have enough platelets or proteins left to make the blood clot.


title: Exsanguination

text: Acidosis means that the body makes too much acid. Usually, the body makes energy out of oxygen carried in the blood and glucose (sugar); this is called aerobic respiration. If a person loses a lot of blood, there will not be enough oxygen in the blood that is left to make energy this way. The body switches to anaerobic respiration and makes energy out of glucose without needing oxygen. However, this creates many acidic waste products (chemicals that the body does not need, which are left over after the body does chemical reactions). Eventually, these waste products can build up so much that they poison the body. This is called acidosis.


title: Exsanguination

text: When the heart does not get enough blood, it can start beating in ways that are not normal. When this happens because of exsanguination, it usually means that the patient is close to dying.


title: Exsanguination

text: If a person loses enough blood, they will go into shock. This means the body's most important organs are not getting the blood, oxygen, and nutrients they need to survive. It also means that the body is not able to get rid of waste products, like acids. If shock gets bad enough, it will kill the person.


title: Exsanguination

text: First aid is an important first step in treating exsanguination. Things that regular people can do to help include:


title: Exsanguination

text: If possible, a person giving first aid should wear gloves any time they touch another person's blood. The sick or injured person may have an infection that can be spread through blood, like HIV or hepatitis. Wearing gloves will protect the person giving first aid from getting these infections.


title: Exsanguination

text: First aid saved many lives during the Boston Marathon bombings, when ordinary people used belts for tourniquets or used their own hands to press against bleeding wounds. The three people who died in the bombings died right away. There were many other people who were hurt badly enough that they could have exsanguinated. For example, some people's legs were blown off by the bombs. However, because of the help of ordinary people giving first aid (and because of emergency medical services), everyone who did not die right away survived.


title: Austria

text: Austria (, ; ), officially the Republic of Austria ( ), is a country in Central Europe. Around Austria there are the countries of Germany, Czech Republic, Slovakia, Hungary, Slovenia, Italy, Switzerland, and Liechtenstein. Currently, the chancellor is Karl Nehammer The previous chancellor was Alexander Schallenberg (2021). Austria has been a member-state of the United Nations since 1955 the European Union since 1995 and OPEC since 2019.


title: Austria

text: The people in Austria speak German, a few also speak Hungarian, Slovenian and Croatian. The capital of Austria is Vienna (Wien).


title: Austria

text: Austria is more than a thousand years old. Its history can be followed to the ninth century. At that time the first people moved to the land now known as Austria. The name "Ostarrichi" is first written in an official document from 996. Since then this word has developed into the Modern German word "Österreich," which literally means "East Empire."


title: Austria

text: Austria is a democratic republic. It is a neutral state, that means it does not take part in wars with other countries. It has been in the United Nations since 1955 and in the European Union since 1995.


title: Austria

text: There has been human settlement in the area that is now Austria for a long time. The first settlers go back to the Paleolithic age. That was the time of the Neanderthals. They left works of art such as the Venus of Willendorf. In the Neolithic age people were living there to dig for mineral resources, especially copper. Ötzi, a mummy found in a glacier between Austria and Italy, is from that time. In the Bronze Age people built bigger settlements and fortresses, especially where there were mineral resources. Salt mining began near Hallstatt. At that time, Celts began to form the first states.


title: Austria

text: The Romans came 15 B.C. to Austria and made the Celtic Regnum Noricum to a province. Modern Austria was part of three provinces, Raetia, Noricum and Pannonia. The border in the north was the Danube.


title: Austria

text: Austria was the Austrian Empire from about 800 to 1867 and was ruled by The House of Habsburg for most of that period. Between 1867 and 1918 it was a part of Austria-Hungary. Then it became a republic. The "First Republic" was from 1918 to 1938. From 1938 to 1945 Austria was part of Nazi Germany. The "Second Republic" was started in 1945.


title: Austria

text: Austria is a mountainous country since it is partially in the Alps. Grossglockner is the tallest mountain in Austria. The high mountainous Alps in the west of Austria flatten somewhat into low lands and plains in the east of the country where the Danube flows.


title: Austria

text: Many famous composers were Austrians or born in Austria. There are Wolfgang Amadeus Mozart, Joseph Haydn, Franz Schubert, Anton Bruckner, Johann Strauss, Sr., Johann Strauss, Jr. and Gustav Mahler. In modern times there were Arnold Schoenberg, Anton Webern and Alban Berg, who belonged to the Second Viennese School.


title: Austria

text: Austria has many artists, there are Gustav Klimt, Oskar Kokoschka, Egon Schiele or Friedensreich Hundertwasser, Inge Morath or Otto Wagner and scienc.


title: Austria

text: Famous Austrian dishes are Wiener Schnitzel, Apfelstrudel, Schweinsbraten, Kaiserschmarren, Knödel, Sachertorte and Tafelspitz. But you can also find a lot of local dishes like Kärntner Reindling (a kind of cake), Kärntner Nudeln (also called "Kärntner Kasnudeln", you may write it "...nudln" too), Tiroler Knödl (may be written "...knödel"; ), Tiroler Schlipfkrapfen (another kind of "Kärntner Nudeln"), Salzburger Nockerl (also may be written ..."Nockerln"), Steirisches Wurzelfleisch (..."Wurzlfleisch") or Sterz ("Steirischer Sterz").


title: Amazon rainforest

text: The forest is in a basin drained mainly by the Amazon River, with 1100 tributaries. It is a moist broadleaf forest which covers seven million square kilometers (1.7 billion acres). Of this, five and a half million square kilometers (1.4 billion acres) are covered by the rainforest.


title: Amazon rainforest

text: This region includes territory from nine nations. Most of the forest is in Brazil, with 60% of the rainforest, followed by Peru with 13%, and Colombia with 10%. Venezuela, Ecuador, Bolivia, Guyana, Suriname and French Guiana have just a small amount of rainforest.


title: Amazon rainforest

text: The Amazon has over half of the planet's rainforest area. It has many species of plants some include rosewood, mahogany and ebony. It is the largest and most species-rich tract of tropical rainforest in the world. The forest was formed at least 55 million years ago, in the Eocene period.


title: Amazon rainforest

text: Wet tropical forests are the most species-rich biome. Tropical forests in the Americas have more species than African and Asian wet forests.


title: Amazon rainforest

text: More than one-third of all species in the world live in the Amazon rainforest. It is the richest tropical forest in the world in terms of biodiversity.


title: Amazon rainforest

text: The region is home to ~2.5 million insect species, tens of thousands of species of plants, and some 2000 species of birds and mammals and a similar number of fish. The diversity of plant species is the highest on earth with some experts estimating that one square kilometre may contain over 75,000 types of trees and 150,000 species of higher plants. One square kilometre of Amazon rainforest can have about 90,000 tons of living plants. This is the largest collection of living plants and animal species in the world. One in five of all the birds in the world live here. To date, an estimated 438,000 species of plants of economic and social interest have been registered in the region with many more remaining to be discovered or cataloged.


title: Amazon rainforest

text: More than a fifth of the Amazon rainforest has already been destroyed. The forest which remains is threatened. People who care for the environment warn about the loss of biodiversity. They also point out that releasing the carbon which is stored in the trees will increase global warming.


title: Amazon rainforest

text: Environmentalists are concerned about loss of biodiversity due to the destruction of the forest. Also, the release of the carbon in the vegetation would accelerate global warming. Amazonian evergreen forests account for about 10% of the world's productivity on land and 10% of the carbon stores in ecosystems. of the order of 1.1 × 10 metric tonnes of carbon. Amazonian forests are estimated to have accumulated 0.62 ± 0.37 tons of carbon per hectare per year between 1975 and 1996.


title: Amazon rainforest

text: Some people have calculated that it may even pay to save the forest. They said that one hectare of Amazonian forest in Peru is worth about US$6280, if it is used to harvest fruits, latex and timber (wood). If all the wood is cut down for timber, it has a value of about US$1000. Obviously, this can only be done once; it is not sustainable. When the forest has been cleared, the hectare of land can be used as a pasture, and is worth about US$148. Not all people agree on the study; some have questioned the assumptions behind it.


title: Amazon rainforest

text: The Brazilian Air Force has been using surveillance aircraft to monitor the forest. At a conference in 2004, scientists warned that the rainforest will no longer be able to absorb the millions of tons of greenhouse gases annually, as it usually does, because of the increased speed of rainforest destruction.


title: Amazon rainforest

text: By 2018, about 17% of the Amazon rainforest had been destroyed. When 20–25% (3–8% more) is destroyed, the climate will change. It will flip to a non-forest ecosystem – degraded savannah. As their homelands continue to be destroyed by deforestation, rainforest peoples are also disappearing.


title: Amazon rainforest

text: Once the process of vulcanization was invented, companies began to make many kinds of new rubber products, such as boots and seals for machines. American and European companies began buying large amounts of latex from Brazil. This boom in Brazilian rubber began around 1870, but the need for automobile tires brought the greatest wealth to the new rubber producers.


title: Amazon rainforest

text: Other rain forests have rubber trees, but Amazonia has by far the best. However, the trees could not be farmed on plantations because if they were next to each other, the insects would eat them. Therefore, people had to find the trees in the rain forest, cut slits in them, leave cups to collect the latex, and come back later to get it.


title: Amazon rainforest

text: Thousands of people moved to the rain forest to work collecting rubber. Most of these people were hired by rich rubber merchants. The rubber merchants loaned them money to come down the river and buy tools. Each merchant’s collectors had to sell the rubber only to their rubber merchant at low prices and buy supplies only from them at high prices. That meant the collectors were always in debt to their merchant and could not leave to do something else. The rubber merchants quickly became very rich.


title: Amazon rainforest

text: The center of the rubber trade was Manaus on the Rio Negro. It became first a boom town and then a beautiful, wealthy city. It had electricity before most of the cities in the United States did. The newly rich merchants built huge expensive homes and brought in automobiles to travel on the city’s few roads. They built a magnificent opera house with crystal chandeliers and decorated tiles brought all the way from Europe.


title: Amazon rainforest

text: However, the rubber boom only lasted about forty years, ending by 1913. Some men had taken the seeds of the Amazon rubber trees and began growing them in the Asian rain forests. The trees grew well there, and they could be grown on plantations. The insects that could destroy them were in South America. So the price of rubber began to fall, and the rubber boom stopped.


title: International Date Line

text: The International Date Line (IDL), also known as just the Date Line, is an imaginary line on the surface of the Earth, going from north to south in the Pacific Ocean. The date becomes one day later as one travels across it in western direction, and one day earlier as one travels across it in eastern direction.


title: International Date Line

text: The reason for this effect is that the countries on the western side of the International Date Line, (in or outside eastern Asia) have the time zone 10–12 hours more than Greenwich. And the countries on eastern side of it (Alaska/Hawaii and other areas) have the time zone 9–12 hours less than Greenwich. So when travelling across the line, one's watch has to be adjusted 20–24 hours, depending on the time zones.


title: International Date Line

text: For example, New Zealand is twelve hours ahead of Greenwich Mean Time while Hawaii is ten hours behind Greenwich Mean Time. When travelling from New Zealand to Hawaii the clocks must be switched 22 hours backwards, about one day.


title: International Date Line

text: International Date Line follows the meridian of 180° longitude down the middle of the Pacific Ocean for some distance. So that it does not cross nations, it passes around the far east of Russia and other archipelagos in the Pacific.


title: International Date Line

text: In the north the date line turns to the east through the Bering Strait and then west past the Aleutian Islands in order to keep Alaska and Russia on opposite sides of the line. This is to keep it in agreement with the date of the rest of those countries. The date line passes equidistantly between the two Diomede Islands—Little Diomede Island (US) and Big Diomede Island (Russia)—at a distance of 1.5 km (1 mi) from each island.


title: International Date Line

text: The date line circumvents the territory of Kiribati by swinging far to the east, almost reaching the 150° meridian.


title: International Date Line

text: In the South Pacific the date line swings east such that Wallis and Futuna, Fiji, Tonga, and New Zealand's Kermadec Islands have the same date but Samoa is one day earlier.


title: International Date Line

text: The International Date Line can cause confusion among airline travelers. The most problematic situation usually occurs with short journeys from west to east. To travel from Tonga to Samoa by air, for example, takes about two hours but involves crossing the International Date Line, causing passengers to arrive the day before they left. This often causes confusion in travel schedules, like hotel bookings. Some examples of time zone adjustments for real air trips are: Alaska-Siberia 21 hours, New Zealand-Cook Islands 22 hours, and Samoa-Tonga 24 hours.


title: International Date Line

text: If someone travels around the globe in an airplane from east to west (the same direction as Magellan), they should subtract one hour for every 15° of longitude crossed, losing 24 hours for one circuit of the globe; but 24 hours are added when crossing the International Date Line (from east to west). The International Date Line must therefore be observed in conjunction with Earth's time zones: the net adjustment to one's watch is zero. If one crosses the date line at precisely midnight, going westward, one skips an entire day; while going eastward, one repeats the entire day.


title: International Date Line

text: For two hours every day, at UTC 10:00–11:59, there are actually three different days observed at the same time. At UTC time Thursday 10:15, for example, it is Wednesday 23:15 in Samoa, which is eleven hours behind UTC, and it is Friday 00:15 in Kiritimati (separated from Samoa by the IDL), which is fourteen hours ahead of UTC. For the first hour (UTC 10:00–10:59), this phenomenon affects inhabited territories, whereas during the second hour (UTC 11:00–11:59) it only affects an uninhabited maritime time zone twelve hours behind UTC.


title: International Date Line

text: Originally, the date line ran along the 180° meridian. This is a relatively good choice, because most of the time, there is no land there. There are however some problems.


title: International Date Line

text: Looking from the north, one of the first places where the meridian runs over dry land is the Chukchi Peninsula, which is part of Russia. The whole peninsula has been declared part of the UTC+12. This means that all of Russia (and with it, all of Asia) is on the same side of the date line.


title: International Date Line

text: There are many groups of islands in the Pacific Ocean. These groups belong to states which do not want some islands on one side of the date line, and the rest on the other. They have therefore decided to move the date line, so that all islands are in the same time zone. Examples of this are the Aleutian Islands, which are on both sides of the 180° meridian. They are part of Alaska, and are therefore all in the UTC-10 timezone. The date line has a "bump" to the west, there.


title: International Date Line

text: There are a few Islands, east of the 180°, which belong to New Zealand. It was decided that they should have the same date as New Zealand, so the date line runs east of the meridian there.


title: International Date Line

text: Kiribati is a state consisting of many small islands, spread over a huge portion of the Pacific; the meridian runs right through the state. Because the state needed the same date over all its territory, the date line was shifted east, the biggest shift to occur, in 1995. The easternmost island of Kiribati was renamed to Millennium Island, because it was the first part of the world which saw the new millennium.


title: International Date Line

text: The Philippines had very good trade relations with Mexico. They therefore decided they wanted the same date, date line to the west of the state. When the trade with China grew, this was inconvenient. They changed, after Monday, 30 December 1844, came Wednesday, 1 January 1845.


title: International Date Line

text: Jews and Muslims and Christians regard particular days of the week as holy. For Muslims this is Friday, Jews (and a few Christian denominations) regard Saturday as the Sabbath, while most Christians observe Sunday as "the Lord's Day" in honour of the resurrection of Jesus on that day. This works well if the traveller stays on the same side of the date line, but there is a problem when travellers move across it. For the traveller it might still be Friday, but the place where he is might say that it is Saturday.


title: Madrid

text: Madrid🇪🇸 (pronounced: “mah-drid or /məˈdrɪd/) is the capital and largest city of Spain. Madrid is in the middle of Spain, in the Community of Madrid. The Community is a large area that includes the city as well as small towns and villages outside the city. 7 million people live in the Community. More than 3 million live in the city itself. It is the largest city of Spain and, at 655 m (2,100 ft) above sea level, the second highest capital in Europe (after the Andorran capital Andorra la Vella). It is the second largest city in the European Union. As it is the capital city, Madrid is where the monarch lives and also where the government meets. Madrid is the financial centre of Spain. Many large businesses have their main offices there. It has four important footballs teams, Real Madrid, Atlético Madrid, Getafe, and Rayo Vallecano. People who live in Madrid are called madrileños.


title: Madrid

text: Madrid was ruled by the Romans from the 2nd century. After AD 711 it was occupied by the Moors. In 1083 Spain was ruled again by Spaniards. Catholic kings ruled the country. By the mid-16th century it had become the capital of a very large empire. Spain was ruled by monarchs from the House of Habsburg, then the House of Bourbon. After the Spanish Civil War it was ruled by a dictator until the mid-1970s when it became a democracy.


title: Madrid

text: Although it is a modern city, a lot of its history can be seen and felt as one walks along the streets and in the large squares of the city. There are beautiful parks, famous buildings, art galleries and concert halls.


title: Madrid

text: During the history of Spain many different people have lived there. The Phoenicians came in 1100 BC, followed by Carthaginians, Romans, Vandals, Visigoths and Moors. It was not until 1492, when the Catholic Monarchs got power, that Spain became a united country. Jews and Moors, who had lived happily there for many years, were driven away. Spain became very rich because it conquered many overseas countries, especially in Central and South America. However, Spain fought many wars and lost much of its treasure. It was very poor in 1936 when the Civil War was fought. General Franco became a harsh dictator until 1975 when Juan Carlos I was brought back to Spain and made king. There is now a democratic government.


title: Madrid

text: In prehistoric times people lived in the area which is now Madrid. The Romans lived there for several centuries. The origin of today’s city really starts in the 9th century when Muhammad I had a small palace built where the Palacio Real stands today. The Moors built strong forts in Madrid in 865 and put a wall round the city. These walls stood until 1476 when they were knocked down. In 1561 Felipe I moved the royal court from Toledo to Madrid. Madrid had now become the capital of a very large empire. Over the next years and decades the Plaza Mayor was built and many great buildings and monuments, many of which still stand.


title: Madrid

text: When Ferdinand II of Aragon and Queen Isabella of Castile came to Madrid, Spain had become a very rich country. The 16th and 17th centuries are now known as the “Golden Century”. Their grandson was the famous Charles I of Spain (also known as Charles V, Holy Roman Emperor). He liked his court to be in Seville. His son, Philip II (1527–1598) moved the court to Madrid in 1561.


title: Madrid

text: In the late 1800s there was a revolt, known as the First Spanish Republic. Later the monarchy was restored, but then there was a Second Spanish Republic followed by the Spanish Civil War. The Second Spanish Republic started on 14 April 1931 and was celebrated in La puerta del Sol which is the center of the city. Madrid suffered a lot in this war. It was bombed by airplanes.


title: Madrid

text: During the dictatorship of Francisco Franco, especially during the 1960s, south Madrid became very industrialized, and many people from the rural areas moved to Madrid especially to the south east of the city.


title: Madrid

text: When General Franco died and democracy was restored, Madrid became more prosperous. During the 1980s and 1990s many new buildings were put up.


title: Madrid

text: Madrid has been attacked many times by terrorists. This includes the bombing of a restaurant in 1985, killing 18 people and the of trains in 2004, killing over 190 people.


title: Madrid

text: Madrid has a borderline cold semi-arid climate ("BSk" in the Köppen climate classification) and a hot-summer Mediterranean climate ("Csa" in the Köppen climate classification). Most rain falls in autumn and spring. The winters are cool because it is high up, and occasionally it snows. The summers are hot and dry. Often the temperature is above 30 °C (86 °F) in July and August and can often reach 40 °C (104 °F). At night it is much cooler. This is why many offices and businesses are closed and people have a sleep (siesta) in the afternoon when it is hot. Then they come out again in late afternoon and often eat dinner late at night.


title: Madrid

text: Spain's Royal Palace is in Madrid. It is one of the largest palaces in all of Western Europe. But the king and his family do not live there anymore; they live in a smaller palace, and only use the Royal Palace for important events, like meeting other kings and other official ceremonies. One can go inside the Royal Palace and learn about the history of Spanish monarchy.


title: Madrid

text: Other famous buildings are: The Prado Museum, the Temple of Debod, the Santiago Bernabeú Stadium and the Cuatro Torres Business Area.


title: Madrid

text: There are a lot of very big and important art museums in Madrid. The most famous ones are the Prado Museum, the Queen Sofia Museum, and the Thyssen-Bornemisza museum. These show off paintings, sculptures, and other works of art from some of the most famous artists in the world.


title: Madrid

text: Many famous, important, and valuable works of art are in these museums. For example, the Queen Sofia museum has a famous painting by Pablo Picasso, called "Guernica". Picasso painted this painting to show how sad and angry it made him when the German Nazis destroyed a town in Spain called Guernica in 1937. Picasso had said that the painting should never return to Spain until it was a democracy again. Once that happened, they built the Queen Sofia museum just to have a good place to put it.


title: Madrid

text: There are many other sights to see in Madrid. Many people go to see the Plaza Mayor which was a market place. The Plaza de la Villa was another famous market place. There are a lot of shops along the Gran Via. Real Madrid football fans celebrate at the Plaza de Cibeles. Two famous gates to see are the Puerta del Sol and the Puerta de Alcalá. A more recent landmark is the Almudena Cathedral.


title: Madrid

text: Madrid has some lovely parks. The Retiro Park is the most famous. The Cristal Palace can be found in this park.


title: Psychology

text: Psychology is the study of the mind. It studies thoughts, feelings, and behaviors in humans and animals. Psychology aims to explain how the mind works. It also looks at how our actions relate to how we think.


title: Psychology

text: A lot of the research in psychology is done on humans. However, animals are also used in research. Examples of this are classical conditioning and operant conditioning. Psychology is a vast subject area. It covers many topics. It is divided into branches. Psychology has a lot in common with other fields of research. Ideas in psychology overlap with ideas in the sciences of anatomy, biology, neuroscience and physiology.


title: Psychology

text: A person who works in the field of psychology is called a psychologist. A psychologist tries to understand how the mind works so that they can help people and animals. They must go through higher education for many years in order to become a professional. These practitioners attempt to explain how the mind functions by itself (individual) and with others (social). They also see how the mind affects the body. They work with social, behavioral, and cognitive sciences.


title: Psychology

text: Psychology has been split up into smaller parts called branches. These are subjects in psychology that try to answer a particular group of questions about how people think. The branches of psychology that are often studied are:


title: Psychology

text: Psychology is a type of science, so research psychologists use many of the same types of methods that researchers from other natural and social sciences use.


title: Psychology

text: Psychologists make theories to try to explain a behavior or pattern they see. Based on their theory, they make predictions. Then, they carry out experiments or collect data to see if their prediction is right or wrong.


title: Psychology

text: Some types of experiments cannot be done on people because it would take too long, cost too much money, risk people's heath, or be unethical. There are also other ways psychologists study the mind and behavior scientifically, and test their theories. Psychologists might wait for some events to happen on their own; they might look at patterns among existing groups of people in natural environments; or they might do experiments on animals (which can be simpler and more ethical to study).


title: Psychology

text: Just like in other fields of science, a good psychological theory can be proven wrong as new information about a subject is learned. Just like in any natural science, psychologists can never be completely sure that their theory is correct. If a theory can be proved wrong, but experiments do not prove it wrong, it is more likely that the theory is accurate. This is called falsifiability.


title: Psychology

text: Psychologists use many tools as part of their daily work. Psychologists use surveys to ask people how they feel and what they think. They may use special devices to look at the brain and to see what it is doing. Psychologists use computers to collect data as they measure how people behave in response to pictures, words, symbols, or other stimuli. Psychologists also use statistics to help them analyze the data that they get from their experiments.


title: Psychology

text: Not all psychology is scientific psychology. Psychodynamic psychology and depth psychology try to interpret dreams to understand the unconscious mind. They are older approaches to psychology begun by Carl Jung. He was interested in finding methods to measure personality traits.


title: Psychology

text: Humanistic psychology and existential psychology believe that it is more important to understand personal meaning than to find causes and effects of mental processes and behaviors.


title: Psychology

text: Psychologists are people who work in the field of psychology. A psychologist may work in either basic research or applied research. Basic research is the study of people or animals to learn more about them. Applied research uses what is learned from basic research to solve real-world problems. A qualified clinical psychologist can become a therapist or counsellor.


title: Psychology

text: To become a psychologist, a person must first get a basic degree at a university and go to graduate school. A Master's degree, either MSc (Master of Science) or MA (Master of Arts), allows for work such as a school psychologist. A doctorate degree takes a longer time to earn because it includes doing research and writing a detailed report. A doctoral graduate uses the initials PhD or DPhil (Doctor of Philosophy). Some clinical psychologists earn a Doctor of Psychology degree and use the initials PsyD after their name. The American Psychological Association say that people need a PhD (or PsyD) and a current state license in the U.S. to call themselves a psychologist.


title: Psychology

text: The words "psychologist" and "psychiatrist" may be confused with each other. A "psychiatrist" has graduated from medical school and uses the initials MD or its equivalent (MB ChB in London University, for example). A psychiatrist or doctor may work with a psychologist by prescribing and checking the effects of medications.


title: Gender performativity

text: Gender performativity is a term first used by the feminist philosopher Judith Butler in their 1990 book "Gender Trouble". They argue that being born male or female does not determine behavior. Instead, people learn to behave in particular ways to fit into society. The idea of gender is an act, or performance. This act is the way a person walks, talks, dresses, and behaves. They call this acting "gender performativity." What society regards as a person's gender is just a performance made to please social expectations and not a true expression of the person's gender identity.


title: Mary of Teck

text: Mary of Teck (Victoria Mary Augusta Louise Olga Pauline Claudine Agnes; 26 May 1867 – 24 March 1953) was the queen consort of King George V of the United Kingdom and Emperor of India. She was the mother of Edward VIII later Duke of Windsor George VI and grandmother of Queen Elizabeth II Queen of the United Kingdom and Princess Margaret, Countess of Snowdon. She was the Great grandmother of the current King Charles III of the United Kingdom and the Commonwealth realms


title: Mary of Teck

text: By birth, Mary was a member of the House of Teck in Berlin, Germany, and through her mother, she was a distant member of the British Royal Family. Within her family, she was given the nickname "May" after the month of her birth.


title: Mary of Teck

text: Princess Mary was born at Kensington Palace in London on 26 May 1867. Her mother was Princess Mary Adelaide, a daughter of Prince Adolphus, Duke of Cambridge, and a granddaughter of King George III and first cousin of Queen Victoria of the United Kingdom. Her father was Francis, Duke of Teck. Due to her parent's financial troubles, Princess Mary spent much of her early life abroad in order to economize, the Tecks returned to London in 1883, living at White Lodge in Richmond Park.


title: Mary of Teck

text: In 1891, Princess Mary, who was liked by Queen Victoria, became engaged to her double second cousin once removed Prince Albert Victor, Duke of Clarence and Avondale, the eldest son of Prince Albert Edward, Prince of Wales. Prince Albert Victor was the heir to the throne after his father, bringing Princess Mary and her family to the senior end of the Royal Family. However, a few weeks before the wedding, Prince Albert Victor died of influenza. Nevertheless, Queen Victoria still favored Mary as a royal bride and therefore arranged for her to marry Albert Victor's brother, Prince George, created Duke of York. They were married at St. James's Palace, London, on 6 July 1893.


title: Mary of Teck

text: Princess Mary was devoted to her children and to her public duties. She left her children in the care of a nanny, Charlotte "Lalla" Bill, and taught her children history and music. With her public duties, she was equally devoted, becoming Patron of a number of charities. When her father-in-law became King Edward VII, Prince George and Princess Mary undertook an eight-month tour of the British Empire. No royal had undertaken such a big tour before. Princess Mary broke down in tears at the thought of leaving her children, though they were in the care of their doting grandparents.


title: Mary of Teck

text: In 1910, Edward VII died, and Prince George ascended the throne as George V. Mary thus became Queen. During the First World War, Queen Mary was criticized for her German heritage. The conflict with Germany forced George V to change the name of the Royal House from Saxe-Coburg and Gotha to Windsor. He also stripped all titles from those members of the Royal Family who fought for Germany. Following the war, Queen Mary continued her public duties and suffered a family tragedy when she lost her youngest son, Prince John. In 1935, King George celebrated his Silver Jubilee, commemorating 25 years of his reign, and Queen Mary accompanied him during the official tours and visits that took place. Queen Mary used her extensive knowledge of history and royal protocol to advise and support her husband on matters of state.


title: Mary of Teck

text: In 1936, King George V died. His death was shortened by an injection of morphine and cocaine, administered by his doctor. Queen Mary supported her son, now King Edward VIII, during his reign. In December, however, the King abdicated the throne because he wished to marry a divorced American commoner, Wallis Simpson.


title: Mary of Teck

text: This put his brother, Prince Albert, Duke of York, in his place as King George VI. King George VI was shy and was at first reluctant to take on his new duties and responsibilities. Queen Mary and his wife, Queen Elizabeth later Queen mother , supported him in his new role. The former King Edward VIII became the Duke of Windsor, went to live in Paris, and had a cool relationship with his family in England. No member of the family attended his wedding to Wallis in 1937, and she was never received by Queen Mary.


title: Mary of Teck

text: During the Second World War, Queen Mary lived at Badminton House, owned by her niece's husband, the Duke of Beaufort. She continued her duties and supported the war effort. Following the war, she returned to her pre-war home, Marlborough House. She continued her public duties in old age, surviving to see her granddaughter, Elizabeth, ascend the throne as Queen Elizabeth II. After suffering from lung cancer (described publicly as "gastric problems"), Queen Mary died of the disease at Marlborough House on 24 March 1953. She lay in state at Westminster Hall before being buried beside her husband at St. George's Chapel at Windsor Castle. She survived her husband by 17 years and outlive three of her children, Prince John of the United Kingdom and Prince George Duke of Kent and King George VI.


title: Electrical circuit

text: A circuit is a closed path that consists of circuit components in which electrons from a voltage or current source can flow. If the circuit consists of electric components like a resistor, a capacitor, an inductor etc. then it will be called an Electrical circuit and if the circuit consists of any of the electronic circuit components like a diode, a Transistor etc. then it will be called an Electronic circuit. So, the electronic circuits may consist both of the electrical and electronic circuit components, but an electrical circuit will have only the electrical components.


title: Electrical circuit

text: The point where electrons enter an electrical circuit is called the "source" of electrons. The point where the electrons leave an electrical circuit is called the "return" or "earth ground". The exit point is called the "return" because electrons always end up at the source when they complete the path of an electrical circuit.


title: Electrical circuit

text: The part of an electrical circuit that is between the electrons' starting point and the point where they return to the source is called an electrical circuit's "load". The load of an electrical circuit may be as simple as those that power home appliances like refrigerators, televisions, or lamps or more complicated, such as the load on the output of a hydroelectric power generating station.


title: Electrical circuit

text: Circuits use two forms of electrical power: alternating current (AC) and direct current (DC). AC often powers large appliances and motors and is generated by power stations. DC powers battery-operated vehicles and other machines and electronics. Converters can change AC to DC and vice versa. High-voltage direct current transmission uses big converters.


title: Electrical circuit

text: Electronic circuits usually use direct current sources. The load of an electronic circuit may be as simple as a few resistors, capacitors, and a lamp, all connected together to create the flash in a camera. Or an electronic circuit can be complicated, connecting thousands of resistors, capacitors, and transistors. It may be an integrated circuit such as the microprocessor in a computer.


title: Electrical circuit

text: Resistors and other circuit elements can be connected in series or in parallel. Resistance in series circuits is the sum of the resistance.


title: Electrical circuit

text: A circuit or wiring diagram is a visual display of an electrical circuit. Electrical and electronic circuits can be complicated. Making a drawing of the connections to all the component parts in the circuit's load makes it easier to understand how circuit components are connected. Drawings for electronic circuits are called "circuit diagrams". Drawings for electrical circuits are called "wiring diagrams". Like other diagrams, these diagrams are usually drawn by draftsmen, and then printed. Diagrams may also be created digitally using specialised software.


title: Electrical circuit

text: A schematic is a diagram of an electrical circuit. Schematics are graphical representations of the essential connections in a circuit, but they are not lifelike depictions of a circuit. Schematics use symbols to represent components in the circuit. Conventions are used in a schematic to represent the way electricity flows. The common convention we use is from the positive to the negative terminal. The realistic way electricity flows is from the negative to the positive terminal.


title: Electrical circuit

text: Circuit diagrams use special symbols. The symbols on the drawings show how components like resistors, capacitors, insulators, motors, outlet boxes, lights, switches, and other electrical and electronic components are connected together. The diagrams are a big help when workers try to find out why a circuit does not work correctly.


title: Electrical circuit

text: The current flowing in an electrical or electronic circuit can suddenly increase when a component part fails. This can cause serious damage to other components in the circuit, or create a fire hazard. To protect against this, a fuse or a device called a "circuit breaker" can be wired into a circuit. The circuit breaker will open, or "break", the circuit when the current in that circuit becomes too high, or the fuse will "blow". This gives protection.


title: Electrical circuit

text: The standard return for electrical and electronic circuits is the earth ground. When an electrical or electronic device fails, it may open the return circuit to the earth ground. The user of the device could become a part of the device's electrical circuit by providing a return path for the electrons through the user's body instead of the circuit's earth ground. When our body becomes part of an electrical circuit, the user can be seriously shocked, or even killed by electrocution.


title: Electrical circuit

text: To prevent the danger of electrical shock and the possibility of electrocution, ground fault interrupts devices detect open circuits to earth ground in attached electrical or electronic devices. When an open circuit to earth ground is detected, the G.F.I. device immediately opens the voltage source to the device. G.F.I. devices are similar to circuit breakers but are designed to protect humans rather than circuit components.


title: Electrical circuit

text: Short circuits are circuits that get back to the power source unused or with the same power as put out. Using these usually blow a fuse but sometimes they don't. Doing this with a battery can cause electrical fires.


title: Vulva

text: The vulva is the part of the body of female mammals (including women) where the outside parts of the reproductive system can be seen. The parts of the vulva that can be seen are the:


title: Vulva

text: The mons pubis is the area of skin and fat above the other structures. It protects the other structures below it. The labia majora are thick areas of skin and fat located to the side of the urinary and vaginal openings. Smaller and thinner labia are the labia minora. These structures are connected to the hood of the clitoris . They are close to the vagina. Many people call the vagina when they mean the vulva. The vagina is the "tube" connecting the internal parts (the womb) to the vulva.


title: Starfish

text: All live in the ocean, on the sea floor. Many starfish live in deep water, others in shallow water. Some live in the intertidal zone, between low and high tide. They have five or more arms and can be quite large. The Sunflower sea star ("Pycnopodia helianthoides") is the largest: fully grown, its arm-span is about a metre. This is a bit larger than the famous Crown-of-thorns starfish, which lives on coral polyps.


title: Starfish

text: Although starfish are invertebrates, they do have a kind of skeleton. The bodies of starfish are composed of calcium carbonate plates, known as 'ossicles'. These form the endoskeleton, which takes on a variety of forms such as spines and granules.


title: Starfish

text: They have a primitive nervous system, but not a brain. They also do not have blood, instead they use sea water to pump things around their bodies.


title: Starfish

text: There are over 1500 different species of sea star. Most sea stars are predators. They eat mussels, clams, and other bivalves. Occasionally, they catch small fish.


title: Starfish

text: Most starfish have five arms, called "rays" that come out from a center circle (disk). If a starfish has more than five rays, it will often have rays in multiples of five; there could be 10, 15, 20, or even 30 rays on one starfish. This is called pentameral (five-fold) symmetry.


title: Starfish

text: The degree of protection offered by the skeleton differs between species. If the skeleton becomes more rigid, it offers better protection against predators. However, this will tend to limit its feeding alternatives. Great flexibility is required for the process of external digestion used by many species to eat bivalves. The less well armoured species may adopt a life in places where they are not so open to predation. The heavily armoured ones can tough it out in the most competitive habitats:


title: Starfish

text: The movement of starfish is guided by their senses of touch and sight. There are five 'eyes', light-sensitive cushions, one at the end of each arm. These and the tube feet are connected to nerve fibres, so these animals are more complex than might appear.


title: Starfish

text: Although starfish started off as filter-feeders, they evolved to become major predators of shell-fish (the brachiopods and bivalves). They can also eat small crustacea and fish. Their tube feet developed suckers, perhaps originally to improve movement. Later, they were used to open shell-fish.


title: Starfish

text: The shells of brachiopods and bivalves are held together by strong muscles. What the starfish does is clamp hold of them on either side with its tube feet, and apply a steady pull. The starfish, with its muscles and hydraulic system, can pull for much longer than any bivalve muscle can withstand. Apparently, ten minutes are usually enough to open the shell a bit. Then the starfish slips its stomach inside the shell. The stomach can get through a slot as narrow as 0.1mm. The starfish then dissolves the mollusc where it lives, absorbing the nutrients. This digestion process takes much longer than opening the shell, perhaps a couple of days.


title: Starfish

text: Some species swallow the shell whole, and dissolve the contents inside their stomach, then push out the shell afterwards.


title: Starfish

text: The ability of starfish to eat brachipods and bivalves developed in the Mesozoic, especially in the Jurassic and Cretaceous. This was part of the "Mesozoic marine revolution", which transformed the sea-floor fauna. Weakly defended and static shellfish disappeared, and more heavily armoured or more mobile shellfish flourished.


title: Starfish

text: Starfish, like many sea creatures, are able to "regenerate" (grow back) parts of their bodies. Starfish are better at regeneration than most other creatures. Not only can a new ray grow when a ray is torn off, but if the torn off ray has even a small piece of the central disk still attached, a whole new starfish can grow from the one ray.


title: Starfish

text: Because starfish like to eat clams and oysters, fishermen who gather shellfish have tried for years to get rid of them. To kill the starfish, fishermen would catch them, slice them right in half, and throw them back in the ocean. However, because starfish can grow back parts of their bodies, they were actually increasing the number of starfish.


title: Oblate spheroid

text: An oblate spheroid is a famous shape. It is the shape of the Earth and some other planets. It is like a sphere squashed from the top so the circumference around the poles is less than the circumference around the equator. Shapes of this type are called ellipsoids.


title: Oblate spheroid

text: Many planets, including the Earth and Saturn, are oblate spheroids. The difference between a sphere and the Earth's shape is small, only about one part in 300.


title: Oblate spheroid

text: Stars spin, and some spin very fast. The faster the spin, the flatter the oblate spheroid. The Sun rotates at 2 km per second, neutron stars have speeds of thousands of km/sec.


title: Oblate spheroid

text: In 1687 Isaac Newton published the "Principia". He included a proof that a rotating self-gravitating fluid body in equilibrium takes the form of an oblate ellipsoid of revolution (a spheroid). The amount of flattening depends on the density and the balance of gravitational force and centrifugal force.


title: Oblate spheroid

text: In other words, the Earth is a spheroid because it rotates. Gas giants like Jupiter and Saturn are flattened by rotation more than the Earth.


title: Charlemagne

text: Charlemagne (, , , ) (c. 2 April 748 – 28 January 814) was the king of the Franks and the first Holy Roman Emperor. He was crowned as the Emperor on Christmas Day, 800. He was the older son of King Pippin III of the Carolingian dynasty. When Pippin died, Charlemagne and his brother Carloman ruled together. When Carloman died in 771 Charlemagne became the only ruler of the Franks.


title: Charlemagne

text: The Franks—one of the Germanic peoples who had moved their homes over the River Rhine into the Roman Empire as it was falling apart—were, by the year 700, the rulers of Gaul, and a lot of Germania east of the Rhine. They also protected the Papacy and the Roman Catholic faith. When their king Pepin the Short died, his sons, Charlemagne and Carloman were chosen to share the kingdom. They divided it into two parts: one half for Charlemagne, and the other for Carloman. Carloman died on December 4, 771, leaving Charlemagne as the leader of the whole Frankish kingdom.


title: Charlemagne

text: He was king of the Franks from 768, and king of the Lombards from 774. He was crowned Imperator Augustus (Emperor) in Rome on Christmas Day by Pope Leo III in 800, starting the Holy Roman Empire, that they hoped would be a kind of second Western Roman Empire (while the Byzantines in Constantinople were still keeping up the Eastern Roman empire). With many wars, Charlemagne spread his empire across much of Western Europe.


title: Charlemagne

text: Charlemagne fought in many wars over the course of his reign. He is known for using his sword, "Joyeuse", in each of the thirty years of war and the 18 battles he fought in. He also finally managed to conquer Saxony, something the Roman Emperor Augustus could not do 800 years earlier. He was able to convert the Saxons to Catholic Christianity. He also had many schools built so his people could learn. However, he also killed thousands of those who failed to convert.


title: Charlemagne

text: Charlemagne's politics and plans failed, which led to low self-esteem. His last years were spent in bed in deep depression. He died in 814, leaving his kingdom to his only son, Louis the Pious. The descendants of Charlemagne are called "Carolingians". His family line died out in Germany in 911 and in France in 987.


title: Apocrypha

text: The Apocrypha are religious texts that are in some versions of the Catholic Bible. Other versions omit them. The word comes from Ancient Greek "" (apokrypha). Apocrypha means "those that were hidden". Generally, the term is applied to writings that were not part of the canon. There are several reasons why these texts were not included. The texts might only have been known to few people, or they might have been left out because their content does not fit well into that of the other books of the Bible. Some of the apocrypha were written at a later date, and were therefore not included.


title: Apocrypha

text: The Authorized King James Version called these books ‘Apocrypha’. It separated them, because the Bible said so in 2 Esdras 14:46, "But keep the seventy last, that thou mayest deliver them only to such as be wise among the people: For in them is the spring of understanding, the fountain of wisdom, and the stream of knowledge."


title: Apocrypha

text: Roman Catholic Bibles have these books in the Old Testament. They do not call them Apocrypha. They call them deuterocanonical, which means that they belong to the second canon. Canon just means an official list of literary works accepted as representing a field. The first list is of books first written in Hebrew. This second list is of books first written in Greek.


title: Apocrypha

text: These books were kept in Catholic Bibles because it is believed that the Bible which Jesus read was a Bible that included the books of the "Apocrypha," the deuterocanonical books. It is known that the most popular Bible at the time of Jesus was the Greek Septuagint version - which includes these extra books. That is why early Church fathers quoted from Bibles including these books.


title: Apocrypha

text: Christians disagree about the ‘Apocrypha’. Others point out that the ‘Apocrypha’ was in every Christian Bible until 1828.


title: Apocrypha

text: In 1828 these books were taken out of some Bibles. The translators of the King James Bible said that these books were written to prepare the people for Jesus, in the same way as John the Baptist did. They said that the apostles used these books. And modern day members of the Church of Jesus Christ of Latter-Day Saints (sometimes referred to as Mormons) also have hints in the Book of Mormon.


title: Apocrypha

text: There is no question that these books have always been part of the Bible in Oriental Orthodox Churches, so they were definitely not added in the 1500s. Around the year 80 AD, the Jewish Council (Sanhedrin) decided to cut the books from the Hebrew Bible, but they stayed in the Christian Bible. Then soon after Christianity became the only religion of Roman Empire in the 4th century, the Romans decided to cut out all of the same books that the Sanhedrin had cut out, and they moved some of them to the "apocrypha".


title: Apocrypha

text: Note: Other candidates for Apocryphal scriptures include supposedly lost portions of Esther and Sirach.


title: Acceleration

text: Acceleration is a measure of how fast velocity changes. Acceleration is the change of velocity divided by the change of time. Acceleration is a vector, and therefore includes both a size and a direction. Acceleration is also a change in speed and direction, there is:


title: Acceleration

text: Acceleration is the rate of change of the velocity of an object. Acceleration formula_1 can be found by using:


title: Acceleration

text: Sometimes the change in velocity formula_7 is written as Δformula_8. Sometimes the change in time formula_9 is written as Δt.


title: Acceleration

text: In difficult situations, the acceleration can be calculated using mathematics: in calculus, acceleration is the derivative of the velocity (with respect to time), formula_10.


title: Acceleration

text: Acceleration has its own units of measurement. For example, if velocity is measured in meters per second, and if time is measured in seconds, then acceleration is measured in meters per second squared (m/s).


title: Acceleration

text: Acceleration can be positive or negative. When the acceleration is negative (but the velocity does not change direction), it is sometimes called deceleration. For example, when a car brakes it decelerates. Physicists usually only use the word "acceleration".


title: Acceleration

text: Newton's laws of motion are rules for how things move. These rules are called "laws of motion". Isaac Newton is the scientist who first wrote down the main laws of motion.


title: Acceleration

text: According to Newton's Second Law of Motion, the force something needs to accelerate an object depends on the object's mass (the amount of "stuff" the object is made from or how "heavy" it is).


title: Acceleration

text: This formula is very well-known, and it is very important in physics. Newton's Second Law of Motion, in short "Newton's Second Law", is often one of the first things that physics students learn.


title: Acceleration

text: Deceleration is negative or backwards acceleration. This means that something slows down instead of speeding up. For example, when a car brakes, it is decelerating.


title: Watch

text: A watch is a small clock carried or worn by a person. It makes it easy to see the time. It is also a fashion accessory for men and women, and expensive watches are designed for this purpose. A watch may be one of the few accessories worn by a person.


title: Watch

text: A wristwatch is designed to be worn on a wrist, attached by a strap or other type of bracelet. A pocket watch is to be carried in a pocket. There are other variations. Nurses often wear a watch attached to the front of their uniform. It hangs down from a short strap: when lifted by the user it is right side up.


title: Watch

text: Watches evolved in the 17th century from spring-powered clocks, which appeared as early as the 14th century. In 1524, Peter Henlein created the first pocket watch.


title: Watch

text: As technology developed, mechanical watches were largely replaced by vibrating quartz crystals, producing accurately timed electronic pulses. Some watches use radio technology to correct the time and date. The first digital electronic watch was developed in 1970.


title: Watch

text: Electronic movements, also known as quartz movements, have few or no moving parts, except a quartz crystal which is made to vibrate by the piezoelectric effect. A varying electric voltage is applied to the crystal, which responds by changing its shape so it works as an oscillator. It resonates at a stable frequency, which paces a timekeeping mechanism. Most quartz movements are primarily electronic but are geared to drive mechanical hands on the face of the watch to give a traditional analog display of the time. Most consumers prefer this.


title: Tokaimura nuclear accident

text: The Tokaimura nuclear accident was a serious nuclear radiation accident in Japan. It took place at a uranium-reprocessing facility in Tokaimura, northeast of Tokyo, Japan, on 30 September 1999. The accident occurred in a very small fuel preparation plant operated by JCO.


title: Tokaimura nuclear accident

text: The direct cause of the accident was workers putting uranyl nitrate solution containing about 16.6 kg of uranium, which exceeded the critical mass, into a precipitation tank. The tank was not designed to dissolve this type of solution and was not designed to prevent such accidents to happen. As a result, three workers were exposed to neutron radiation doses in excess of allowable limits. Two of these workers later died.


title: Tokaimura nuclear accident

text: Many emergency workers and nearby residents were hospitalized and hundreds of thousands of others were forced to remain indoors for 24 hours.


title: Tokaimura nuclear accident

text: The three workers who worked at the uranium-reprocessing facility were Hisashi Ouchi, Masato Shinohara, and Yutaka Yokokawa. Two of them died of radiation poisoning. Hisashi Ouchi, aged 35, died 12 weeks after the accident. He had lost most of his skin, and was kept alive for 83 days, according to his parents and wife will. Ouchi was closest to the tank when the accident occurred. He ended up as the first victim of this nuclear accident. Seven months after the accident, Masato Shinohara died, aged 40.


title: Tokaimura nuclear accident

text: Ouchi was reported to have received 17 sieverts (sv) of radiation, Shinohara 10 sv and Yokokawa 3 sv; 8 sieverts is considered a fatal dose, and 50 milli sieverts is the maximum limit of annual dose allowed for Japanese nuclear workers.


title: Machine

text: A machine is a thing that is created by people to make work easier. It is a tool or invention which multiplies the effect of human effort. The machine produces a mechanical advantage.


title: Machine

text: Often a machine will change one form of energy to another form of energy. Simple machines increase or change the direction of a force.


title: Aleph null

text: (omega). It is the cardinality (size) of the set of natural numbers (there are aleph null natural numbers). Georg Cantor invented and named the concept. The symbol for aleph null is formula_1


title: Aleph null

text: It is the first infinite number in a series of infinite cardinal numbers. In fact, it is the size of any set which can be matched one-to-one with the natural numbers. The set of algebraic numbers, for example, has cardinality formula_1.


title: Emulsifier

text: An emulsifier is an additive which helps two liquids mix. For example, water and oil separate in a glass, but adding an emulsifier will help the liquids mix together. Some examples of emulsifiers are egg yolks and mustard. An emulsifier consists of a water-loving hydrophilic head and an oil-loving hydrophobic tail. The hydrophilic head is directed to the aqueous phase and the hydrophobic tail to the oil phase. The emulsifier positions itself at the oil/water or air/water interface and, by reducing the surface tension, has a stabilising effect on the emulsion.


title: Emulsifier

text: Emulsifiers belong to the surfactants, usually with a grease-loving (lipophilic) and a water-loving (hydrophilic) part, which can nest around boundary layers between aqueous and greasy parts. Grease and water repel each other, making an emulsion without emulsifier easily fall apart. An emulsifier prevents this rejection because it projects the water-loving side towards the water and the fat-loving side towards the fat. The extent to which the hydrophilic or lipophilic character dominates is represented by the HLB value of the surfactant (HLB = Hydrophilic-Lipophilic Balance). A high HLB value (10 to 18) indicates a hydrophilic substance suitable for emulsifying fats or oils in water. Substances with a low HLB (3 to 8) are lipophilic and suitable for water-in-oil emulsions.


title: Emulsifier

text: Emulgators are used in cosmetics for example in creams and bath oils. A cream consists largely of an emulsion of fat in water or of water in fat, while a bath oil often contains an emulsifier to partially distribute the oil in the water. Without an emulsifier, the oil would float on the water. Examples of emulsifiers used in cosmetic products are glyceryl monostearate, Polysorbate 20, accasia, tragacanth agar, and pectin.


title: Emulsifier

text: Emulsifiers are often used in food technology, for example to keep products moist or greasy (such as cakes and bread) or to mix fat-soluble substances with water, such as margarine.


title: Emulsifier

text: An example of an emulsifier in food is lecithin. Lecithin is in egg yolk and is used for example in making mayonnaise. It ensures a good connection between fats and vinegar. In european food, various E-numbers are used in the series from E400 to E499.


title: Karnataka

text: Karnataka is a state in the Republic of India. It has an area of . It is bigger than Syria but smaller than Senegal. In traditional Indian geography, it is part of the Southern zone. It has 31 districts. As of the 2011 census, it has a population of approximately 61.1 million. The present Chief Minister of the state is Basavaraj Bommai from the Bharatiya Janata Party (BJP).


title: Karnataka

text: Bangalore is the capital city of Karnataka. It is also known as the IT capital of India. Mysore, Mangalore, Hubli-Dharwad, Kalaburgi and Hospet are the other big cities in Karnataka. Places to see in Karnataka are Bangalore, Mysore, Hampi, Bijapur, Belur/Halebid, Shivamogga, sannati (yadgir) and Shravanabelagola. The Lalbhag Botanical Garden, Badami and the Jog water are some of the well-known tourist attractions in Karnataka.


title: Karnataka

text: The Kannada language is the official language of the state and the most prominent language spoken by the people in Karnataka. Telugu, Tamil, Marathi, Hindi and Malayalam are also spoken in Karantaka. Kannada is declared as one of the official languages of India. It has won the most number of Gnanpith Awards - 8, which are awarded to writers.


title: Karnataka

text: Karnataka is bordered by the Arabian Sea to the west, Goa to the northwest, Maharashtra to the north, Telangana to the northeast, Andhra Pradesh to the east, Tamil Nadu to the south and Kerala to the southwest. Topographically, Karnataka consists of the Arabian Sea Coast, Western Ghats, Deccan Plateau, and Eastern Ghats.


title: Karnataka

text: Karnataka's history dates back to the 3rd century BC. The succession of able administrators from the Hoysalas, Chalukyas and the mighty Vijayanagara rulers, to the arrival of the Mughals in the 17th century and the British in the 18th century have contributed to the mix of culture and heritage that is as rich as it is ancient.


title: Chocolate

text: Chocolate is a food made from cacao beans. It is used in many desserts like pudding, cakes, candy, ice cream, and Easter eggs. It can be in a solid form like a candy bar or it can be in a liquid form like hot chocolate. Commercial chocolate has sugar and sometimes milk added. It has a melting point of about .


title: Chocolate

text: Dark chocolate has less sugar, and a more bitter taste. It was originally used to make drinking chocolate. Chocolate has been around the world since the time of the Olmec, Mayan, and Aztecs.


title: Chocolate

text: The cacao tree was first found to be useful for its seeds about two thousand years ago. Early Central Americans and Mexicans used the seeds from the cacao tree to make a drink that tasted bitter, not sweet. Only the important people could drink it. The word for "chocolate" in almost every language comes from its name in the Nahuatl language of Mexico, "chocolatl".


title: Chocolate

text: Later on, this drink was made sweeter and made into what is known today as hot chocolate. It was made popular by Spanish explorers who brought it from North America to Spain. When chocolate was sweetened and made into candy, it became a very popular treat for many Europeans. At first, only the rich could afford chocolate. In France at that time, only nobles could buy it Now, many people enjoy it. Most cocoa today is made in Africa in countries like the Ivory Coast (Côte d'Ivoire) and Nigeria.


title: Chocolate

text: Until the 16th century, the cacao tree was unknown to the Europeans. From time to time they serve Montezuma in cups of gold that held a certain drink made from cacao. After the Spanish conquest of the Aztecs, chocolate was imported to Europe.


title: Chocolate

text: There are three main types of chocolate: white chocolate, milk chocolate, and dark chocolate. White chocolate tastes much sweeter than the other two types, because it has more of the sweeter ingredients in it.


title: Chocolate

text: Chocolate is safe to eat unless it is eaten in large amounts. Some animals, like dogs and cats, become sick even if they eat only a little chocolate. People with diabetes can also get sick from eating chocolate. Dark chocolate contains ingredients that lower blood pressure and fight diseases. Small amounts of dark chocolate have been found to lower the risk of heart disease because of polyphenol in chocolate. It is necessary to moderate the amount of chocolate you eat.


title: Chocolate

text: Making chocolate is a process that has many steps. First, the cocoa beans are collected and put in piles or containers to make them ferment. Fermentation makes the sugar in the beans turn into alcohol. Then the beans are dried and cleaned. Chocolate makers must cook the beans, and then crush them to make the cocoa butter and the chocolate liquor come out of them. Then the chocolate maker mixes different ingredients together to make the different kinds of chocolate. Dark or bittersweet chocolate is made from sugar, cocoa butter, and chocolate liquor. Milk chocolate uses all of those ingredients plus milk and vanilla. White chocolate does not contain chocolate liquor, but only cocoa butter, along with sugar, milk and vanilla. After these ingredients are put together, the chocolate maker is still not finished. One of the last things to be done is something called conching. Conching means crushing the chocolate very finely and keeping it warm so that it is liquid. Before chocolate is conched, it feels very rough in the mouth instead of smooth. Conches use heavy rollers that plow back and forth through the chocolate paste under regulated speeds and temperatures. Conching for several hours to several days makes good chocolate. The last step in making chocolate is called tempering. The chocolate is heated, and then shaken, and then cooled a few times.


title: Chocolate

text: There are a number of ingredients in chocolate. The most notable of these are caffeine and theobromine. These two chemicals are closely related and are found in all cocoa beans. In any bean, the amount of each chemical varies depending on the genetics of the tree and the stresses placed on the tree during the growing season. It takes two hours to make chocolate.


title: Leaf

text: A leaf is an above-ground plant organ and it is green. Its main functions are photosynthesis and gas exchange. A leaf is often flat, so it absorbs the most light, and thin, so that the sunlight can get to the chloroplasts in the cells. Most leaves have stomata, which open and close. They regulate carbon dioxide, oxygen, and water vapour exchange with the atmosphere.


title: Leaf

text: Plants with leaves all year round are evergreens, and those that shed their leaves are deciduous. Deciduous trees and shrubs generally lose their leaves in autumn. Before this happens, the leaves change colour. The leaves will grow back in spring. Leaves are normally green in color, which comes from chlorophyll found in the chloroplasts. Plants that lack chlorophyll cannot photosynthesize.


title: Leaf

text: Leaves come in many shapes and sizes. The biggest undivided leaf is that of a giant edible arum. This lives in marshy parts of the tropical rain forest of Borneo. One of its leaves can be ten feet across and have a surface area of over 30 square feet (~2.8 sq. metres).


title: Leaf

text: A leaf is a plant organ and is made up of a collection of tissues in a regular organisation. The major tissue systems present are:


title: Leaf

text: The epidermis is the outer layer of cells covering the leaf. It forms the boundary separating the plant's inner cells from the external environment.


title: Leaf

text: The epidermis is covered with pores called "stomata". Each pore is surrounded on each side by chloroplast-containing guard cells, and two to four subsidiary cells that lack chloroplasts. Opening and closing of the stoma complex regulates the exchange of gases and water vapor between the outside air and the interior of the leaf. This allows photosynthesis, without letting the leaf dry out.


title: Leaf

text: Most of the interior of the leaf between the upper and lower layers of epidermis is a tissue called the mesophyll (Greek for "middle leaf"). This assimilation tissue is the main place photosynthesis takes place in the plant. The products of photosynthesis are sugars, which can be turned into other products in plant cells.


title: Leaf

text: Plants with leaves all year round are evergreens, and those that shed their leaves are deciduous. Deciduous trees and shrubs generally lose their leaves in autumn. Before this happens, the leaves change colour. The leaves will grow back in spring.


title: Leaf

text: The 'veins' are a dense network of xylem, which supply water for photosynthesis, and phloem, which remove the sugars produced by photosynthesis. The pattern of the veins is called 'venation'.


title: Leaf

text: In angiosperms the pattern of venation differs in the two main groups. Venation is usually is parallel in monocotyledons, but is an interconnecting network in broad-leaved plants (dicotyledons).


title: Leaf

text: Many leaves are covered in trichomes (small hairs) which have a wide range of structures and functions. Some trichomes are prickles, some are scaled, some secrete substances such as oil. Carnivorous plants secrete digestive enzymes from trichomes.


title: Leaf

text: The waxy cuticle is the waterproof, transparent outer surface of the leaf. It is waterproof to reduce water loss (transpiration) and transparent to allow light to enter the palisade cell.