AcharyaChanakya/simple-wikipedia huggingface dataset:
Some geographers say Eurasia is one continent, because Europe and Asia are mostly on the same tectonic plate and do not have a sea between them. The Ancient Greeks divided the world they knew into Europe, Asia and Africa. To them, the Aegean Sea was the division between the Balkan Peninsula in Europe and Asia Minor in Asia. North of the Sea of Marmara, the Greeks thought the lands on the western side of the Black Sea was Europe and the eastern side was Asia. The ancient Greeks did not know very much about the lands north of the Black Sea. Since Classical Antiquity, people have talked about Asia and Europe as two continents, so it is now a tradition.
Some other continents, which are not completely divided by sea, are joined together by a thin strip of land (called an isthmus). An example is North America and South America, which are connected by the Isthmus of Panama. Europe and Asia are not divided by a sea, nor by any isthmus.
Outside of geological definitions, Eurasia also includes the Indian subcontinent and the Arabian Peninsula.
Sometimes Eurasia is divided into West Eurasia and East Eurasia. The dividing line is sometimes the Ural Mountains. West Eurasia includes Europe and the Middle East. Historians sometimes add North Africa to West Eurasia, because the Sahara Desert divides North Africa from Sub-Saharan Africa, and it is as difficult to cross as a sea. Also, North Africa is culturally linked to Europe by the Mediterranean Sea.
The OECD’s Eurasia activities involve 13 countries extending from the borders of the European Union to the Far East:
North Pole
The North Pole is the point that is farthest north on Earth. It is the point on which axis of Earth turns. It is in the Arctic Ocean and it is cold there because the sun does not shine there for about half a year and never rises very high. The ocean around the pole is always very cold and it is covered by a thick sheet of ice.
There is also a Magnetic North Pole. It is near the physical North Pole. A compass points toward the magnetic North Pole.
There is a star called the North Star (or Polaris) that is always in the sky above the North Pole. People can tell how far north they are by seeing how high the North Star appears in the sky.
In linguistics, noun phrases have grammatical number. Plural is one kind of grammatical number. In English, plural noun phrases are counted as more or less than one (e.g., "32 degrees, no bananas", "0.5 liters", "1.2 grams", "two times", "three fish", "20 mothers"). In contrast, a singular noun phrase usually refers to something that you would count as one only (e.g., "one time", "a glass", "the sun", "my mother", "Jennifer"). Noun phrases that cannot be counted are also singular in English (e.g., "water", "the meat", "some space", etc.).
In many languages, a suffix (word ending) is added to a word to show that the word is plural. In English, the normal plural suffix "i"s "-s" (e.g., "cat" is singular, and "cats" is plural).
There are a number of exceptions:
It is fair to say that most native English-speakers make mistakes in this area, which is one of the more troublesome aspects of English.
All European languages have plural forms. The suffix that is used in each language is different from the one that is applied to English nouns.
In other languages, such as Chinese, Korean and Japanese, there is usually no plural ending.
Alexander Gode
Alexander Gottfried Friedrich Gode-von-Aesch or simply Alexander Gode (October 30, 1906 - August 10, 1970) a German-American linguist and translator. He helped create Interlingua.
Oceania is a name used in geography for the region made up of Australia, Polynesia, Melanesia, and several other island nations in the surrounding area. It is often listed as one of the continents of the world.
The term "Oceania" does not have one single agreed definition. The widest definition of Oceania includes the entire region between continental Asia and the Americas, including Australasia, as well as islands in the Pacific Rim such as the Japanese archipelago, Taiwan, and the Aleutian islands.
On the other hand, the Oceania ecozone includes all of Micronesia, Fiji, and all of Polynesia except New Zealand. Sometimes, people use the term 'Oceania' to include only the Polynesian and Melanesian islands in the Pacific Ocean, as separate from Australasia. When Oceania is treated seperately from Australia, the region of Oceania is referred to as "Australia and Oceania".
In the United Nations' geographic regions, Oceania includes Australia and the nations of the Pacific from Papua New Guinea east, but not the Malay Archipelago or Indonesian New Guinea.
A smaller usage of Oceania as a continent includes only Australia, Tasmania, New Guinea, and the islands between them. This part of the world is usually called Australasia instead. For these reasons, it is "not" correct to say that Australasia is part of Oceania, because what is meant by 'Oceania' is not clear. Australasia has an exact definition in biogeography and geology; Australasia includes New Zealand, Australia (including Tasmania), and Melanesia, New Guinea, and the islands just north and east of Australia. All these are south-east of the Bali–Lombok line, also known as the Wallace Line.
Southern Ocean
The Southern Ocean is the ocean around Antarctica. It means the waters of the Atlantic, Pacific, and Indian Oceans around the continent of Antarctica. Since the 1770s geographers have discussed its limits. Nowadays, sixty degrees south latitude is often accepted. Some people call this ocean the Antarctic Ocean.
The total area is 20,327,000 km², and the coastline length is 17,968 km.
The Catalan language is a Romance language spoken in Catalonia, Valencian Community, the eastern part of Aragon, the Balearic Islands, a small zone of Murcia (all of them in Spain), Andorra, North Catalonia (in France) and the Italian city of L'Alguer. Together, those places are often called the Catalan Countries.
The language that most similar is Occitan. Catalan also has similarities to other Romance languages, such as Spanish, Italian, French and Portuguese. It came from Vulgar Latin and was first spoken in the in the Eastern Pyrenees in the Middle Ages.
There are about 4 million people who speak Catalan as a first language and about 6 million people as a second language. Catalan is the sixth-most-spoken Romance language and also the most-spoken language that is not an official language in the European Union.
A corset is a body covering undergarment (clothes worn under others).
It is made in many forms.
Pop music
Modern pop music grew out of 1950s rock and roll, (for example Chuck Berry, Bo Diddley and Little Richard) and rockabilly (for example Elvis Presley and Buddy Holly). In the 1960s, The Beatles became a famous pop music group. In the 1970s, other styles of music were mixed with pop music, such as funk and soul music. Pop music generally has a heavy (strong) beat, so that it is good for dancing. Pop singers normally sing with microphones that are plugged into an amplifier and a loudspeaker.
There are also many more people working on pop music who are not seen on the stage or in the video. These people include the studio staff (people who help the musicians to record CDs and music videos in music studios), production staff (people who help make the music recordings sound good), distribution staff (people who help sell the music to stores) and retail staff (people that sell the music to people at CD stores).
Tour staff help the band to travel around the country (or around the world) for their concert tours. Some tour staff help by carrying heavy musical instruments onto the stage. Other tour staff drive buses or cars, so that the band can get to the concert. Some tour staff operate sound equipment, such as the large amplifiers and loudspeakers that are used to amplify (make louder) the band's music for the audience.
Promotional staff help to market or promote the band's music, so that more people will know about the band, and buy the band's CDs. Some promotional staff travel to radio stations and give the band's CD to radio station managers or DJs (disk jockeys: the people who announce songs on the radio). Other promotional staff write press releases (short articles) about the band which are sent to the newspapers.
Pop music came from the Rock and Roll movement of the early 1950s, when record companies recorded songs that they thought that teenagers would like. Pop music usually uses musical from the other types of music that are popular at the time. Many different styles of music have become pop music during different time periods. Often, music companies create pop music styles by taking a style of music that only a small number of people were listening to, and then making that music more popular by marketing it to teenagers and young adults.
In the 1950s, recording companies took blues-influenced rock and roll (for example Chuck Berry and Bo Diddley) and rockabilly (for example Carl Perkins and Buddy Holly) and promoted them as pop music. In the late 1960s and early 1970s, record companies took folk music bands and musicians and helped them to create a new type of music called folk rock or acid rock. Folk rock and acid rock mixed folk music, blues and rock and roll (for example The Byrds and Janis Joplin). In the 1970s, record companies created several harder, louder type of blues called blues rock or heavy metal, which became a type of pop music (for example the bands Led Zeppelin and Judas Priest).
In the late 1970s and early 1980s, a type of nightclub dance music called Disco turned into a popular type of pop music. Record companies took an experimental, strange-sounding type of music called New Wave music from the 1980s and turned it into pop music bands such as "The Cars." In the 1990s record companies took an underground type of hard rock called Grunge (for example the band Nirvana). Michael Jackson was also a very influential artist for pop music. His album, "Thriller", is the best-selling album of all time. He also wrote some other very influential songs, such as "Bad", "Give In to Me", "Will You Be There", "Heal the World", "We Are the World", "Black or White", and "Billie Jean", just to name a few. By the 21st century (after the demise of disco in the 1980s) Contemporary R&B became pop music. Examples of Contemporary R&B artists that have a wide pop appeal are Usher, Beyoncé, Rihanna, Chris Brown and more. Pop rappers Flo Rida and Kesha were mainstream in the late 2000s and the early 2010s. Modern pop singers include Ariana Grande, Katy Perry and Lady Gaga. Nicki Minaj blended pop and hip hop in the early 2010s.
Many bands and artists are looked as influential in music history, but the English band The Beatles are the most looked upon band in history because of many of their songs being different types of pop and rock music (even metal and punk). Michael Jackson, The Bee Gees, Nirvana (band) are many of the artists and bands that look at The Beatles as a massive influence on their music.
General semantics
General semantics is a philosophy that deals with how people react to things that happen around them based on meaning. It was created by Alfred Korzybski during the 1920s and early 1930s.
The goal of general semantics is for people to know that when we simplify something, either mentally or in language, that simplification is not the same thing as the thing simplified. How people understand reality is not the same as what reality is because people do not know everything about reality. General semantics teaches that there is always more to something than what is seen, heard, felt, or believed.
Semiotics (or semiology) is a theoretical framework for the study of the meaning of language, signs and symbols. It was first developed in the early 20th century, separately, by the Swiss Ferdinand Saussure and Charles Sanders Peirce of the U.S.A. It can be described as both a science and a technique: a science because it has its own theories and a technique because it is a way of studying systems of representation and meaning. The meaning can be intentional such as a word uttered with a specific meaning, or unintentional, such as a symptom being a sign of a particular medical condition. Signs can communicate through any of the senses, visual, auditory, tactile, olfactory, or gustatory.
The importance of signs and signification has been recognized throughout much of the history of philosophy, and in psychology as well. The term derives from the Greek: σημειωτικός, "sēmeiōtikos", "observant of signs" (from σημεῖον "sēmeion", "a sign, a mark"). For the Greeks, "signs" occurred in the world of nature, and "symbols" in the world of culture. As such, Plato and Aristotle explored the relationship between signs and the world.
The general study of signs that began in Latin with Augustine culminated with the 1632 "Tractatus de Signis" of John Poinsot, and then began anew in late modernity with the attempt in 1867 by Charles Sanders Peirce to draw up a "new list of categories." More recently, Umberto Eco, in his "Semiotics and the Philosophy of Language", has argued that semiotic theories are implicit in the work of most, perhaps all, major thinkers.
Semiotics is usually divided into three parts:
The major branches of semiotics include:
Nitrogen is a nonmetal chemical element. The atmosphere contains more than 78 percent of nitrogen. It has the chemical symbol N and atomic number 7. Its stable inside typically contains 14 nucleons (7 protons and 7 neutrons). It has 5 electrons in its outer shell.
Nitrogen is a colorless odorless gas at normal temperature. It is normally attached to another nitrogen atom, making a nitrogen molecule (N). This bond is very strong. That is why many explosives contain nitrogen. The bond is broken when the explosive is made. When it explodes the bond forms, releasing a lot of energy.
It turns into a liquid at -195.8°C and turns into a solid at -210°C. If it is compressed, it can be turned into a liquid without making it cold.
It usually does not combine with other atoms because its strong bond prevents it from reacting. Lithium is one of the few chemical elements that react with nitrogen without being heated. Magnesium can burn in nitrogen. Nitrogen also makes blue electric sparks. The blue color is caused by the atoms being excited. When they get normal again, they release light. When nitrogen is excited, it reacts with many things that it does not normally react with.
Many chemical compounds that are important for industrial purposes contain nitrogen ions. These include ammonia, nitric acid, nitrates and cyanides. Nitrogen comes in several oxidation states; -3, -2, -/, +1, +3, +4, and +5. Each of those oxidation states has its set of compounds.
Compounds in the -3 oxidation state are weak reducing agents. These include ammonia, ammonium, amide and nitrides. Amino acids and proteins contain nitrogen in this oxidation state. Hydrazine, a compound in the -2 oxidation state, is a strong reducing agent. Azides contain nitrogen in the -/ oxidation state. They are extremely powerful reducing agents, and most are very toxic.
Nitrous oxide contains nitrogen in the +1 oxidation state. It is used as an anesthetic. Compounds containing nitrogen in the +2 oxidation state, such as nitric oxide, are reducing agents. +3 oxidation state compounds are strong oxidizing agents and weak reducing agents. Nitrites are the most common +3 compounds. Compounds in the +4 oxidation state are strong oxidizing agents. They include nitrogen dioxide and dinitrogen tetroxide.
Compounds containing nitrogen in the +5 oxidation state are strong oxidizing agents. They are one of the more common groups of nitrogen compounds. They include nitric acid and dinitrogen pentoxide. They also include nitrates, which are used in explosives such as dynamite, nitroglycerin and trinitrotoluene.
Air is made up of about 78% nitrogen and about 20.95% oxygen, < 1% argon, and traces of other gasses such as carbon dioxide, and water vapor, among others. It is also in a few nitrates in the ground. Ammonium minerals are rare. Nitrogen is in proteins.
Pure liquid nitrogen can be made by cooling air. The nitrogen turns into a liquid at a different temperature than the oxygen. It can also be made by heating certain chemical compounds, such as sodium azide.
Nitrogen as an element is used to prevent things from reacting with the oxygen in the air. It can be used to fill crisp bags and incandescent bulbs. It is also used to fill some tires. It can be used to make electric components like transistors. Liquid nitrogen can be used to freeze things.
Nitrogen compounds have many uses, such as anesthetics (nitrous oxide), explosives (dynamite), cleaners (ammonia), and meat (protein), and planes (fuel).
Oil companies use high pressure nitrogen to help force crude oil to the surface.
Nitrogen was discovered by Daniel Rutherford in 1772, who called it "noxious gas" or "fixed gas". They discovered that part of air did not burn. It was found that animals died in it. It was known as "azote". Many nitrogen compounds also contain the "azide" or "azine" letters, such as hydrazine.
In 1910, Lord Rayleigh found out that when a spark was passed through nitrogen, it made a reactive form of nitrogen. This nitrogen reacted with many metals and compounds.
Association football
Association football is a sport played between two teams. It was invented in England, and is played in most countries. In the United States and Canada, it is called soccer. In most other countries it is called football. Association football is the most popular sport in the world.
There were various attempts to codify the rules of football in England in the mid-19th century. The present laws date from 1863 when a set of rules was adopted in Rugby, Warwickshire by the newly formed Football Association.
Each team has 11 players on the field. One of these players is the goalkeeper, and the other ten are known as "outfield players". The game is played by kicking a ball into the opponent's goal. A match has 90 minutes of play, with a break of 15 minutes during the match. The break in the middle is called "half-time". Added time may be added after half time or after 90 minutes to make up for time lost during the game because of fouls, free kicks, corner kicks, injuries, bookings, substitutions or any other time the game is stopped. If a match ends in a tie, extra-time with two halves of 15 minutes each may be played, and if there is still a tie, a penalty shootout decides the winner. Sometimes extra-time is skipped and the game goes right into the penalty shootout.
There are many competitions for football, for both football clubs and countries. Football clubs usually play other teams in their own country, with a few exceptions. Here are a list of some of those exceptions:
Football clubs also play other teams in their continent in competitions such as the CAF Champions League and the UEFA Champions League.
There are 6 associations (CONCACAF, CONMEBOL, CAF, UEFA, AFC, and OFC). Each association has their own continental competition between clubs and national teams. Some examples are the Copa América for CONMEBOL national teams and the Copa Libertadores for CONMEBOL clubs. FIFA organises international competitions between worldwide clubs and countries. Clubs play in the Club World Cup, and countries play for the FIFA World Cup.
The FIFA World Cup takes place every four years between national teams, and is the world's most popular sporting event, even more popular than the Olympic Games. In football, there are two main competition types. In a "league", all of the teams play the same number of games, but in a "cup", teams leave the competition when they lose, until the last two teams play each other to decide the winner.
Football is the world's most popular sport. It is played in more countries than any other game. In fact, FIFA (the Federation Internationale de Football Association) has more members than the United Nations. It was originally an all-male sport, but today it is played by both males and females (separately, except sometimes at primary school level).
In Europe, the main competitions to compete are the Champions League for the top teams from the top leagues in each country in Europe. Then there is the UEFA Europa League which is for the next best teams from each member country of the UEFA.
The most successful club in the world, in terms of domestic league results, is Rangers F.C. from Scotland, who have won more domestic league titles than any other team in the world. They have won the country's league 54 times which is a world record. In May 2000, Rangers became the first team to win 100 trophies. Other successful clubs are FC Barcelona and Real Madrid from Spain, Bayern Munich and Borussia Dortmund from Germany, Galatasaray S.K. from Turkey, Juventus and Napoli from Italy, Liverpool and Manchester City from England, Paris Saint-Germain from France, and Al Ahly from Egypt.
Spamming is when one person or company sends an unwanted email to another person. Spam emails are the computer version of unwanted "junk mail" that arrives in a mailbox, such as advertising pamphlets and brochures. Spam emails are usually sent to try to get the person to buy something or do something else that will cause gain for the sender.
The emails sent when someone is spamming is called spam. The person or company who sent the unwanted email is called a spammer. Both of these words came from a brand of canned meat called "Spam", but it was a short sketch created by the British comedy group Monty Python in 1970 that led to the word "Spam" being widely used to mean unwanted email messages.
Spam emails are usually sent to many people at once trying to get them to buy a product or sign up for a service. The people who receive the email did not ask to receive the email, and do not want to receive it.
One of the reasons there is so much spam emails around is that it costs very little to send millions of spam messages at once. Spam messages can easily be sent, sometimes even by a special computer program.
The hardest part about spamming is to get the email addresses to send the spam to. Sometimes the spammers do this by searching for emails on the internet, or by buying emails from people who know a lot of them (for example, someone who runs a site that makes users tell them their email address to signup will have a lot of email addresses to sell to spammers).
One part of getting e-mail addresses is to find addresses that are still in use. One trick used by spammers is to put a link at the end of a message like this:
If the person clicks on the link, it tells the spammers that there is someone at the address. Then the spammers put that person on a list of people who actually open spam messages. Next, the spammers sell that list to other spammers. The same thing happens if the person sends another email back to the spammer (called "replying"), which also tells the spammer the message has been opened.
Another trick that spammers use is to put a picture – even one that cannot be seen – into a spam message. The picture will have a name that goes with just that one email. When the email is opened, a request will be sent to the server that has that picture to get the image. If they get this request, then they know that you read their email, which could cause a person to receive even more email spam.
The word "spamming" is also used to describe the act of typing a lot of words or text in Internet chat rooms, so that other people using the chatroom cannot carry on conversations. Usually this blocks the screen with meaningless words, in order to annoy the other people in the chatroom. Spamming in Internet chatrooms is usually considered to be rude. This kind of behavior is usually called "flooding" rather than "spamming".
The word "spam" is often (mistakenly) applied to emails containing content that the receiver sees as silly or simply meaningless (e.g. yujhcykgfvylfuv,uyguvgy).
Computer users at home and in workplaces waste a lot of time opening and deleting spam messages. In some cases, spam emails contain viruses or links to pornography or illegal gambling websites. Spam emails often advertise products or services which are being lied about by the companies sending the spam, such as frauds or scams.
Some user email programs can automatically delete spam messages when they arrive, or move them to a separate spam folder. Internet service providers also detect them automatically and cooperate to cut off customers who are major spammers.
An earthquake is the sudden movement or trembling of the Earth's tectonic plates, that creates the shakes of the ground. This shaking can destroy buildings and break the Earth's surface. Sudden shake under water is called tsunami
Who studies earthquakes is called seismology. There can be many earthquakes over a short period of time in a small area. The sudden release of tension in the tectonic plates sends waves of energy that travel through the Earth. Seismology studies about the cause, repeats, type and size of earthquakes.
Earthquakes are measured using watching from seismographs. The magnitude of an earthquake and the power of shaking is usually reported on the Richter scale. The Richter Scale was invented by Charles Francis Richter in 1935. On the scale, 2 is scarcely noticeable, and magnitude 5 (or more) creates damage over a wide area.
An earthquake under the ocean can destruction as the earthquake itself in mountainous areas. Earthquakes can also create landslides. Earthquakes are part of the Earth's natural rock cycle. The affect of an earthquake can be measured by a seismometer. It detects the shakes caused and it puts these movements on a seismograph. The strength, or magnitude, of an earthquake, is measured using the Richter scale. The Richter scale is numbered 0-9. The largest earthquake ever measured was a 9.5 on the scale a 10 has never been recorded.
Scientists cannot predict an earthquake before it happens. But we do know where earthquakes might happen in the future, like close to fault lines. An earthquake under the ocean can create a tsunami, this can create just as much destruction as the earthquake itself.
Earthquakes sometimes hit cities and kill hundreds or thousands of people. Most earthquakes happen along the Pacific Ring of Fire but the biggest ones mostly happen in other places. Tectonically active places are places where earthquakes or volcanic eruptions are quite repeated.
Earthquakes are caused by tectonic movements in the Earth's crust. The main cause is when tectonic plates ride one over the other, causing orogeny (mountain building), and severe earthquakes.
The boundaries between moving plates form the largest fault surfaces on Earth. When they stick, motion between the plates leads to increasing stress. This continues until the stress rises and breaks, suddenly allowing sliding over the locked portion of the fault. This releases the stored energy as shock waves. The San Andreas fault in San Francisco, and Rift valley fault in Africa are faults like this.
1. Volcanic Earthquakes : Earthquakes which are caused by volcanic eruptions are quite devastating. However, these are confined to areas of active volcanoes.
2. Collapse Earthquakes : In areas of intense mining activity, often the roofs of underground mines collapse and minor tremors take place. These are called collapse earthquakes.
There are three main types of geological fault that may cause an earthquake: normal, reverse (thrust) and strike-slip. Normal faults occur mainly in areas where the crust is being extended. Reverse faults occur in areas where the crust is being shortened. Strike-slip faults are steep structures where the two sides of the fault slip horizontally past each other.
Most earthquakes form part of a sequence, related to each other in terms of location and time. Most earthquake clusters consist of small tremors which cause little to no damage, but there is a theory that earthquakes can recur in a regular pattern.
A foreshock is an earthquake that occurs before a larger earthquake, called the mainshock.
An aftershock is an earthquake that occurs after a previous earthquake, the mainshock. An aftershock is in the same region of the main shock but always of a smaller magnitude. Aftershocks are formed as the crust adjusts to the effects of the main shock.
Earthquake swarms are sequences of earthquakes striking in a specific area within a short period of time. They are different from earthquakes followed by a series of aftershocks by the fact that no single earthquake in the sequence is obviously the main shock, therefore none have notably higher magnitudes than the other. An example of an earthquake swarm is the 2004 activity at Yellowstone National Park.
Sometimes a series of earthquakes occur in a sort of earthquake storm, where the earthquakes strike a fault in clusters, each triggered by the shaking or stress redistribution of the previous earthquakes. Similar to aftershocks but on adjacent segments of fault, these storms occur over the course of years, and with some of the later earthquakes as damaging as the early ones. Such a pattern occurred in the North Anatolian fault in Turkey in the 20th century.
Tsunami or a chain of fast moving waves in the ocean caused by powerful earthquakes is a very serious challenge for people's safety and for earthquake engineering. Those waves can inundate coastal areas, destroy houses and even swipe away whole towns. This is a danger for the whole mankind.
Unfortunately, tsunamis can not be prevented. However, there are warning systems which may warn the population before the big waves reach the land to let them enough time to rush to safety.we aware of this tsunami
Earthquake-proof buildings are constructed to withstand the destructive force of an earthquake. This depends upon its type of construction, shape, mass distribution, and rigidity. Different combinations are used. Square, rectangular, and shell-shaped buildings can withstand earthquakes better than skyscrapers. To reduce stress, a building's ground floor can be supported by extremely rigid, hollow columns, while the rest of the building is supported by flexible columns inside the hollow columns. Another method is to use rollers or rubber pads to separate the base columns from the ground, allowing the columns to shake parallel to each other during an earthquake.
To help prevent a roof from collapsing, builders make the roof out of light-weight materials. Outdoor walls are made with stronger and more reinforced materials such as steel or reinforced concrete. During an earthquake flexible windows may help hold the windows together so they don’t break.
Colour or color is a property of light as seen by people. In Commonwealth English, it is spelled “colour” (notice the U), while in American English it is “color” (no U).
The most common colour names are:
"Primary colours" can be mixed to make other colours. Red, yellow, and blue are the three traditional primary colours. The primary colours for television screens and computer monitors are red, green and blue. Printers and paints use magenta, yellow, and cyan as their primary colours; they may also use black. Sometimes this set of colours is simply called red, yellow, and blue.
People who can not see colours or have a distorted sense of colour are called colour blind. Most colour blind people are male.
Colours are sometimes added to food. Food colouring is used to colour food, but some foods have natural colourings, like beta carotene.
When something has no colour, it is transparent. An example is air.
The science of color is sometimes called chromatics, colorimetry, or simply color science.
A translucent material is not the same as a colourless material because it can still have a colour, like stained glass.
Scurvy is a disease (sickness). It is caused by not eating enough vitamin C. But scurvy can be prevented. It has many symptoms. People who have scurvy get spots on their skin, especially on their legs. Their teeth may loosen and/or fall out. They may bleed from the mouth, nose, and gums (mucus membranes). A person with scurvy will look pale and feel sad (see depression). They will not be able to move easily, because their joints hurt.
Scurvy can be easily cured. Oranges and other fruits can restore normal vitamin levels. In the past, sailors more commonly got scurvy due to being unable to access these foods. Fresh fruit could not be kept for long. The main cause of scurvy is lack of fresh fruits and vegetables. It is now uncommon.
At first, a person with scurvy may:
A bit later a person with scurvy may:
When a person gets help for scurvy, they usually get better very quickly. Babies start eating again after one or two days of help. The symptoms get better within seven days.
Eating vitamin C prevents scurvy. How much vitamin C a person needs changes with his or her age and is different for pregnant and lactating women. The following is the Food and Nutrition Board of the National Academy of Sciences, National Research Council's advice on how much vitamin C to eat every day:
Foods with a lot of vitamin C include the following:
An ion is an electrically charged atom or group of atoms.
It can be made from an atom, or from a group of atoms (molecule). It is "charged" so it will move near electricity. This is because atoms are made of three smaller parts:
An ion has unequal numbers of protons and electrons. Making an ion from an atom or molecule is called "ionization".
The charge on a proton is chosen as +1 (positively charged). The charge on an electron is opposite to the charge on the proton. The charge on the electron is -1 (negatively charged). An atom that is ionized makes two parts, one positive, and one negatively charged. For example, a neutral hydrogen atom has one proton and one electron. Ionizing the atom breaks it into two parts: (1) a positively charged hydrogen ion, H+ (2) a negatively charged electron.
A liquid with ions is called an electrolyte. A gas with lots of ions is called a plasma. When ions move, it is called electricity. For example, in a wire, the metal ions do not move, but the electrons move as electricity. A positive ion and a negative ion will move together. Two ions of the same charge will move apart. When ions move they also make "magnetic fields".
Many ions are colourless. Elements in the main groups in the Periodic Table form colourless ions. Some ions are coloured. The transition metals usually form coloured ions.
In physics, atomic nuclei that have been completely ionized are called charged particles. These are ones in alpha radiation.
Ionization happens by giving atoms high energy. This is done using electrical voltage or by high-energy ionizing radiation or high temperature.
A simple ion is formed from a single atom.
Polyatomic ions are formed from a number of atoms. Polyatomic ions usually consist of all non-metal atoms. But sometimes the polyatomic ion can have a metallic atom too.
Positive ions are called cations. They are attracted to cathodes (negatively charged electrodes). ("Cation" is pronounced "cat eye on", not "kay shun".) All simple metal ions are cations.
Negative ions are called anions. They are attracted to anodes (positively charged electrodes). All simple non-metal ions (except H, which is a proton) are anions.
Transition metals can form more than one simple cation with different charges.
Most ions have a charge of less than 4, but some can have higher charges.
Michael Faraday was the first person to write a theory about ions, in 1830. In his theory, he said what the portions of molecules were like that moved to anions or cations. Svante August Arrhenius showed how this happened. He wrote this in his doctoral dissertation in 1884 (University of Uppsala). The university did not accept his theory at first (he only just passed his degree). But in 1903, he won the Nobel Prize in Chemistry for the same idea.
In Greek "ion" is like the word "go". "Anion" and "cation" mean "up-goer" and "down-goer". "Anode" and "cathode" are "way up" and "way down".
List of ions
Cognitive science
Anthropology is the study of human beings in the past and present.
The word anthropology has two roots: [ anthrop- ] and [ -ology ]. Anthrop- means “about human beings,” and -ology means “a type of science." Anthropology is a type of science about human beings. A person who studies anthropology is called an anthropologist.
The main goal of anthropology is to answer the questions: What makes us human and why?
Anthropology is a biological and historical social science that helps us learn how groups of people are the same, and how they are different in all parts of the world. Anthropologists do research in many places and study how people live now and how they may have lived in the past. They research in modern cities, small villages, tribes, and in the countryside.
Anthropology uses a "four-field approach" that divides anthropology into four big kinds:
Archaeology is the study of humans from the past. People who study archaeology are called archaeologists.
Archaeologists look at things that past people left behind to know how they lived. They look at tools, bones, and past houses to see how people in the past are not the same as people that live today.
Here are some other examples of what archaeologists like to study:
Biological or physical anthropology studies human bodies and how they change over time.
They look at how humans live in nature and how their bodies change because of where they live. They also study how human beings and apes and monkeys are alike. Sometimes biological anthropologists study human and animal bones to learn about how past humans lived. They are also called physical anthropologists.
Here are some other examples of what biological anthropologists like to study:
Linguistic anthropology is the study of how people talk.
Linguistic anthropologists study sounds and how they go together to make words. Then they study what the words mean and how people use them. Linguistic anthropology also studies how language changes what people think and how people change language. No two people talk the same way, so linguistic anthropologists want to know why that happens.
Here are some other examples of what linguistic anthropologists like to study:
Socio-Cultural Anthropology is the study of human societies and cultures.
It looks at how human beings understand the world around them and how they act with the people around them. Socio-cultural anthropologists study living people by going to their homes and learning about who those people are and what they do. They write about people in places all over the world to see why people are different. Some socio-cultural anthropologists study medicine in these places and some look at how babies grow up in other places.
Here are some other examples of what socio-cultural anthropologists like to study:
Even though there are four main kinds of anthropology, there are a lot of different kinds of anthropology within the four main kinds. Here are some examples:
Like everything in life, anthropology has a set of rules that every anthropologist needs to follow. The rules try to make sure that no one gets hurt or mad when studying other people. Here are some of the rules:
This is a list of important people who studied anthropology.
Education is about learning skills and knowledge. It also means helping people to learn how to do things and support them to think about what they learn. It's also important for educators to teach ways to find and use information. Education needs research to find out how to make it better.
Through education, the knowledge of society, country, and of the world is passed on from generation to generation. This may include education in morality, for example learning how to act as loyal, honest and effective citizen.
Education may help and guide individuals from one class to other. Educated individuals and groups can do things like, help less educated people and encourage them to get educated.
There are different ways to categorize education, for example by age or subject. One way is to divide it into "formal education", "non-formal education", and "informal education".
Formal education is usually in school, where a person may learn basic, academic, or trade skills. Small children often attend a nursery or kindergarten but often formal education begins in elementary school and continues with secondary school. Post-secondary education (or higher education) is usually at a college or university which may grant an academic degree. Or, students may go to a City college where they learn practical skills. This way learners can become qualified to be plumbers, electricians, builders and similar occupations. These course have arrangements for students to get practical experience. Apprenticeship was the older way to do this,
Non-formal education includes adult basic education, adult literacy education or school equivalency preparation. In nonformal education someone (who is not in school) can learn literacy, other basic skills or job skills. Home education, individualized instruction (such as programmed learning), distance learning and computer-assisted instruction are other possibilities.
Informal education is less organized. It may be a parent teaching a child how to prepare a meal or ride a bicycle. People can also get an informal education by reading many books from a library or educational websites. This may also be called self-education. Some quite famous men have been largely self-educated, like Alfred Russell Wallace.
Unschooling is when kids learn as they go and do not go to traditional school buildings. Instead, they go on websites, play games, or engage in normal hobbies and learn along the way. The experience of children with "unstructured" lives is that they get into trouble.
Deschooling is a more drastic approach. It advocates abolishing schools. It was put forward in the USA of the 1960s and 1970s. It is no longer an active movement.
Many public schools (U.S. terminology) provide a free education through the government. Parents may send their own children to a private schools, but they must pay for it. In some poorer places, some children cannot go to school, because their countries do not make education available, or because their families do not have enough money, or because the children have to work for money, or because the society has prejudice against education for girls.
There are primary schools and secondary schools. In many places they are government funded. Colleges and universities usually charge fees (tuition payments) which may be different in different countries.
The army is the part of a country's military that fights on the ground. People in the army are called soldiers. Many modern armies have vehicles such as tanks, airplanes, and helicopters to help soldiers fight on the ground.
A soldier may be a volunteer (someone who joins something because they want to), or he may be forced by the government to join the army. Forcing men to join the army is called conscription or "draft". Voluntary armies tend to be small by numbers, but high in confidence and quality. Drafted armies are large, but often lacking in confidence and in quality: it may be very difficult to force someone to risk his life against his will. Sometimes an army is made up from mercenaries, who fight just for pay and have little loyalty to the country which they serve.
Soldiers do many things, from shooting enemies, to digging defensive trenches. They are used to defend their country, or attack another country's army. It is difficult, and soldiers must be in good shape, both physically and mentally. They almost always move together, and that way the team can do more things, in a safer way. They may be assigned to certain places to guard, or they may be told to search a place, or even attack it. That is up to their commander. Every soldier answers to someone else, so that way, everything is organized.
Sometimes, when a country's army is busy in different places, and there are not enough soldiers to do more, a country can hire civilians to do some of the army's jobs, like protecting buildings and important people and convoys of trucks traveling from one place to another. Usually, they hire veterans who were members of the military before leaving and working elsewhere.
Working in the army and wearing the uniform is called "service". A soldier will never say "I work as a Sergeant in the signal corps" but always "I "serve" as a Sergeant in the signal corps", or other rank, specialty and unit. Only civilian workers who do not wear uniform speak about "working" in the army.
The function of the army is based on discipline. That means that every soldier will unquestionably carry out the orders which he or she has received and will obey his or her superior officer or non-commissioned officer. There is only one exception: orders which violate the human rights or international law must not be obeyed as it is considered a war crime. The chain of command is expressed by the military rank system and hierarchy.
A soldier is supplied with weapons, such as guns, knives, and other simple gear for surviving in the battlefield, such as food, water, clothes, and tents. They must keep good care of the items. Some soldiers train to be a doctor for the army, or other civilian duties.
Before a soldier joins the army, he must qualify to be in it first. The person is put through tests, so that the army will know if the recruit can do it or not. This is sometimes called 'boot camp'. He must complete mental tests, and physical tests. It depends on where he is testing that will tell him how hard it will be. He will also take tests to determine what job he will do in the military. For instance, he may work with computers and be a member of the signal corps or be a cook for the soldiers, he may have been a construction worker in civilian life and be a military engineer, he may become a truck driver and serve in logistics, or he may be very good with a rifle and be a sniper in the infantry. There are a lot of jobs that a person can choose to do in the army.
There are traditionally six branches of service in the army:
Theology is the study of one or more religions
(‘Theo-’ means God in Greek and ’-logy’ is study, which makes it ’God study’ or ’study of God’). Somebody who studies theology is called a theologian. Books or ideas about theology are called theological.
Theology may be studied for many reasons. Some people study theology to better understand their own religion, while other people study theology so that they can compare religions.
The word ‘theology’ was first used to describe the study of God in Christianity but some now use it to describe the study of religion generally, but not everyone agrees that it is right to do so. Some people use the words 'comparative theology' in reference to approaching theology within more than one religion at once.
During the High Middle Ages, it was thought that theology was the highest subject learned in universities. Theology at that time was named "The Queen of the Sciences". There was a plan for young men to study easy subjects and then harder subjects. The easiest subjects were called the Trivium. The next harder subjects were called the Quadrivium. Finally, young men were expected to study theology. This meant that the other subjects existed primarily to help with theological thought.
Work can mean different things depending on how the word is used.
Romania (old spelling: Rumania, Roumania; , ) is a country in southeastern Europe. It is north of the Balkan Peninsula, on the Lower Danube River. Part of Romania is circled by the Carpathian Mountains. It also has a border on the Black Sea. Most of the Danube Delta is found inside Romania. Romania shares borders with Hungary and Serbia to the west, Ukraine to the far northeast, the Republic of Moldova to the near northeast, and Bulgaria to the south.
Romania is a semi-presidential unitary state. It was created when Moldavia and Wallachia joined together in 1859. It was given its independence in the Treaty of Berlin of 1878. At the end of World War II, some of its land (close by what is now known as Moldova) was occupied by the USSR. After the Iron Curtain fell in 1989 Romania was liberated from the communist regime. During the 2000s, Romania made changes to the country, such as reform the democratic system, human rights acts, freedom of speech acts, economy and law. That let Romania join the European Union on January 1, 2007.
Romania has the 9th biggest area of land and the 7th biggest population (with 19 million people) of the European Union member states. The capital and biggest city in Romania is Bucharest ( ), with a population of 1.6 million. One of the cities in Transylvania, Sibiu, was named a European Capital of Culture. Romania joined NATO on March 29, 2004.