What caused high unemployment on the island?

One commentator has observed that, notwithstanding the high unemployment resulting from the loss of full passports during 1981–2002, the level of loyalty to the British monarchy by the St Helena population is probably not exceeded in any other part of the world. King George VI is the only reigning monarch to have visited the island. This was in 1947 when the King, accompanied by Queen Elizabeth (later the Queen Mother), Princess Elizabeth (later Queen Elizabeth II) and Princess Margaret were travelling to South Africa. Prince Philip arrived at St Helena in 1957 and then his son Prince Andrew visited as a member of the armed forces in 1984 and his sister the Princess Royal arrived in 2002.


Who is the only reigning Monarch to have visited the island?


What year did King George VI visit the island?


When did Prince Phillip arrive in Saint Helena?


Prince Andrews, son of Prince Phillip visited in what year?


What did the government of Saint Helena fund in 2012?

In 2012, the government of St. Helena funded the creation of the St. Helena Human Rights Action Plan 2012-2015. Work is being done under this action plan, including publishing awareness-raising articles in local newspapers, providing support for members of the public with human rights queries, and extending several UN Conventions on human rights to St. Helena.


What kind of articles were published to help this plan?


How was support for members of the public given?


What has been more prominently reported in recent years in Saint Helena?

In recent years[when?], there have been reports of child abuse in St Helena. Britain’s Foreign and Commonwealth Office (FCO) has been accused of lying to the United Nations about child abuse in St Helena to cover up allegations, including cases of a police officer having raped a four-year-old girl and of a police officer having mutilated a two-year-old.


Who has been accused of lying about the child abuse issue of Saint Helena?


Who has Britain’s Foreign and Commonwealth Office been accused of lying to about child abuse?


Saint Helena has a high proportion of what kind of birds?

St Helena has long been known for its high proportion of endemic birds and vascular plants. The highland areas contain most of the 400 endemic species recognised to date. Much of the island has been identified by BirdLife International as being important for bird conservation, especially the endemic Saint Helena plover or wirebird, and for seabirds breeding on the offshore islets and stacks, in the north-east and the south-west Important Bird Areas. On the basis of these endemics and an exceptional range of habitats, Saint Helena is on the United Kingdom's tentative list for future UNESCO World Heritage Sites.


What kind of plants are common on Saint Helena?


What organization identified Saint Helena as important for bird conservation?


Saint Helena is on the United Kingdom's list for future what?


How many lichen forming fungi have been recorded on the island?

St Helena's biodiversity, however, also includes marine vertebrates, invertebrates (freshwater, terrestrial and marine), fungi (including lichen-forming species), non-vascular plants, seaweeds and other biological groups. To date, very little is known about these, although more than 200 lichen-forming fungi have been recorded, including 9 endemics, suggesting that many significant discoveries remain to be made.


How many endemic species of fungi have been found?


What kind of invertebrates have been found on the island?


What kind of crop economy did the Island originally have?

The island had a monocrop economy until 1966, based on the cultivation and processing of New Zealand flax for rope and string. St Helena's economy is now weak, and is almost entirely sustained by aid from the British government. The public sector dominates the economy, accounting for about 50% of gross domestic product. Inflation was running at 4% in 2005. There have been increases in the cost of fuel, power and all imported goods.


What was produced during the time the Island was monocrop?


Saint Helena's economy is now almost completely sustained by what?


How much % of production does the public sector cover?


What is the tourist industry mostly based around?

The tourist industry is heavily based on the promotion of Napoleon's imprisonment. A golf course also exists and the possibility for sportfishing tourism is great. Three hotels operate on the island but the arrival of tourists is directly linked to the arrival and departure schedule of the RMS St Helena. Some 3,200 short-term visitors arrived on the island in 2013.


What kind of fishing tourism occurs on the island?


Tourism is completely based on what arriving to the island?


What does Saint Helena have the most expensive of?

Saint Helena produces what is said to be the most expensive coffee in the world. It also produces and exports Tungi Spirit, made from the fruit of the prickly or cactus pears, Opuntia ficus-indica ("Tungi" is the local St Helenian name for the plant). Ascension Island, Tristan da Cunha and Saint Helena all issue their own postage stamps which provide a significant income.


Ascension Island, Tristan da Cunha and Saint Helena all issue their own what?


What was the GDP of the island in 1999-2000?

Quoted at constant 2002 prices, GDP fell from £12 million in 1999-2000 to £11 million in 2005-06. Imports are mainly from the UK and South Africa and amounted to £6.4 million in 2004-05 (quoted on an FOB basis). Exports are much smaller, amounting to £0.2 million in 2004-05. Exports are mainly fish and coffee; Philatelic sales were £0.06 million in 2004-05. The limited number of visiting tourists spent about £0.4 million in 2004-05, representing a contribution to GDP of 3%.


Imports to the island mostly occur from what countries?


What are the main exports of the island?


How much was public expenditure on the island in 2001-2002?

Public expenditure rose from £10 million in 2001-02 to £12 million in 2005-06 to £28m in 2012-13. The contribution of UK budgetary aid to total SHG government expenditure rose from £4.6 million in to £6.4 million to £12.1 million over the same period. Wages and salaries represent about 38% of recurrent expenditure.


By 2005-06 public expenditure had risen to what?


In 2012-2013, public expenditure was what?


UK aid had risen to how much in the same period?


Wages and salaries represent how much % of the island's expenditure?


How many individuals were unemployed on the island in 2013?

Unemployment levels are low (31 individuals in 2013, compared to 50 in 2004 and 342 in 1998). Employment is dominated by the public sector, the number of government positions has fallen from 1,142 in 2006 to just over 800 in 2013. St Helena’s private sector employs approximately 45% of the employed labour force and is largely dominated by small and micro businesses with 218 private businesses employing 886 in 2004.


Employment on the island is dominated by what sector?


In 2013 the number of government jobs was what?


What % of people are employed in the private sector in Saint Helena?


How many private businesses employee people on Saint Helena?


What % of households were spending less than £20 per week in 2004

Household survey results suggest the percentage of households spending less than £20 per week on a per capita basis fell from 27% to 8% between 2000 and 2004, implying a decline in income poverty. Nevertheless, 22% of the population claimed social security benefit in 2006/7, most of them aged over 60, a sector that represents 20% of the population.


What % of the population claimed social security benefits in 2006/7?


How much of the population is over age 60?


How many copper tokens were Issued in 1821?

In 1821, Saul Solomon issued a 70,560 copper tokens worth a halfpenny each Payable at St Helena by Solomon, Dickson and Taylor – presumably London partners – that circulated alongside the East India Company's local coinage until the Crown took over the island in 1836. The coin remains readily available to collectors.


When did the Crown take over the island?


Today Saint Helena has its own currency, the Saint Helena pound, which is at parity with the pound sterling. The government of Saint Helena produces its own coinage and banknotes. The Bank of Saint Helena was established on Saint Helena and Ascension Island in 2004. It has branches in Jamestown on Saint Helena, and Georgetown, Ascension Island and it took over the business of the St. Helena government savings bank and Ascension Island Savings Bank.


The government of Saint Helena produces it's own what?


What year was the Bank of Saint Helena established?


The Saint Helena pound is at parity with what other currency?


How many commercial airports are under construction in Saint Helena?

Saint Helena is one of the most remote islands in the world, has one commercial airport under construction, and travel to the island is by ship only. A large military airfield is located on Ascension Island, with two Friday flights to RAF Brize Norton, England (as from September 2010). These RAF flights offer a limited number of seats to civilians.


What is the only method of travel currently available to Saint Helena?


A large airfield is located on what portion of the island?


What kind of flights are offered to limited civilians?


What ship runs between Saint Helena and Cape town on 5 day voyages?

The ship RMS Saint Helena runs between St Helena and Cape Town on a 5-day voyage, also visiting Ascension Island and Walvis Bay, and occasionally voyaging north to Tenerife and Portland, UK. It berths in James Bay, St Helena approximately thirty times per year. The RMS Saint Helena was due for decommissioning in 2010. However, its service life has been extended indefinitely until the airport is completed.


What year was the RMS Saint Helena supposed to be decommissioned?


What needs to be completed before the RMS Saint Helena can be decommissioned?


When was the construction of an airport in Saint Helena announced?

After a long period of rumour and consultation, the British government announced plans to construct an airport in Saint Helena in March 2005. The airport was expected to be completed by 2010. However an approved bidder, the Italian firm Impregilo, was not chosen until 2008, and then the project was put on hold in November 2008, allegedly due to new financial pressures brought on by the Financial crisis of 2007–2010. By January 2009, construction had not commenced and no final contracts had been signed. Governor Andrew Gurr departed for London in an attempt to speed up the process and solve the problems.


The airport was expected to be completed by what year?


Who was the approved bidder for the airport?


Which governor departed to London to try to speed up the construction of the airport?


When did the British government agree to help pay for the new airport in Saint Helena?

On 22 July 2010, the British government agreed to help pay for the new airport using taxpayer money. In November 2011 a new deal between the British government and South African civil engineering company Basil Read was signed and the airport was scheduled to open in February 2016, with flights to and from South Africa and the UK. In March 2015 South African airline Comair became the preferred bidder to provide weekly air service between the island and Johannesburg, starting from 2016.


Which south african company is helping to engineer the airport?


Which countries will be able to fly to Saint Helena using the airport?


Which airline will provide weekly service to Saint Helena?


What kind of aircraft was the first to land at the new airport?

The first aircraft, a South African Beechcraft King Air 200, landed at the new airport on 15 September 2015, prior to conducting a series of flights to calibrate the airport's radio navigation equipment.


What date did the aircraft land at the new airport?


What are they calibrating via test flights at the airport?


Who conducted the first helicopter landing at the airfield?

The first helicopter landing at the new airfield was conducted by the Wildcat HMA.2 ZZ377 from 825 Squadron 201 Flight, embarked on visiting HMS Lancaster on 23 October 2015.


Where did the helicopter embark on visiting?


When did the aircraft visit HMS Lancaster?


What kind of vehicle offers basic transportation to people in Saint Helena?

A minibus offers a basic service to carry people around Saint Helena, with most services designed to take people into Jamestown for a few hours on weekdays to conduct their business. Car hire is available for visitors.


On what days does the minibus take people into Jamestown?


What day did Radio Saint Helena start operations?

Radio St Helena, which started operations on Christmas Day 1967, provided a local radio service that had a range of about 100 km (62 mi) from the island, and also broadcast internationally on shortwave radio (11092.5 kHz) on one day a year. The station presented news, features and music in collaboration with its sister newspaper, the St Helena Herald. It closed on 25 December 2012 to make way for a new three-channel FM service, also funded by St. Helena Government and run by the South Atlantic Media Services (formerly St. Helena Broadcasting (Guarantee) Corporation).


What was the range of Radio Saint Helena in miles?


How many days a year was Radio Saint Helena broadcast internationally?


What newspaper did Radio Saint Helena collaborate with?


What day was Saint Helena Radio shut down?


Saint FM provided a local radio service for the island which was also available on internet radio and relayed in Ascension Island. The station was not government funded. It was launched in January 2005 and closed on 21 December 2012. It broadcast news, features and music in collaboration with its sister newspaper, the St Helena Independent (which continues).


Which newspaper is the sister company of Saint FM radio?


Which company took over the channels vacated by Saint FM?

Saint FM Community Radio took over the radio channels vacated by Saint FM and launched on 10 March 2013. The station operates as a limited-by-guarantee company owned by its members and is registered as a fund-raising Association. Membership is open to everyone, and grants access to a live audio stream.


What date did Saint FM Community Radio launch?


What kind of people can join Saint Fm Radio Community?


St Helena Online is a not-for-profit internet news service run from the UK by a former print and BBC journalist, working in partnership with Saint FM and the St Helena Independent.


Who is partnered with Saint Helena online?


What does Sure South Atlantic LTD offer?

Sure South Atlantic Ltd ("Sure") offers television for the island via 17 analogue terrestrial UHF channels, offering a mix of British, US, and South African programming. The channels are from DSTV and include Mnet, SuperSport and BBC channels. The feed signal, from MultiChoice DStv in South Africa, is received by a satellite dish at Bryant's Beacon from Intelsat 7 in the Ku band.


How many analogue terrestrial UHF channels does Sure South Atlantic LTD have?


What is the feed signal of Sure South Atlantic received by?


SURE provides what kind of service to the territory?

SURE provide the telecommunications service in the territory through a digital copper-based telephone network including ADSL-broadband service. In August 2011 the first fibre-optic link has been installed on the island, which connects the television receive antennas at Bryant's Beacon to the Cable & Wireless Technical Centre in the Briars.


What kind of network does SURE provide it's service from?


When was the first fibre-optic network installed?


How big is the satellite dish at the satellite ground station in feet?

A satellite ground station with a 7.6-metre (25 ft) satellite dish installed in 1989 at The Briars is the only international connection providing satellite links through Intelsat 707 to Ascension island and the United Kingdom. Since all international telephone and internet communications are relying on this single satellite link both internet and telephone service are subject to sun outages.


Both telephone and internet services are subject to what?


What is the international calling code for Saint Helena?

Saint Helena has the international calling code +290 which, since 2006, Tristan da Cunha shares. Saint Helena telephone numbers changed from 4 to 5 digits on 1 October 2013 by being prefixed with the digit "2", i.e. 2xxxx, with the range 5xxxx being reserved for mobile numbering, and 8xxx being used for Tristan da Cunha numbers (these still shown as 4 digits).


Who shares the calling code +290 with Saint Helena?


How many digits did Saint Helena change their phone numbers to?


When did Saint Helena change the amount of digits in their phone numbers?


What digit are Saint Helena phone numbers prefixed with?


What speed is Saint Helena internet access?

Saint Helena has a 10/3.6 Mbit/s internet link via Intelsat 707 provided by SURE. Serving a population of more than 4,000, this single satellite link is considered inadequate in terms of bandwidth.


What is the internet service provided through?


Who provides the internet service in Saint Helena?


What kind of population does SURE service?


How many satellites provide the link to the internet?


What kind of broadband service is provided on the island?

ADSL-broadband service is provided with maximum speeds of up to 1536 KBit/s downstream and 512 KBit/s upstream offered on contract levels from lite £16 per month to gold+ at £190 per month. There are a few public WiFi hotspots in Jamestown, which are also being operated by SURE (formerly Cable & Wireless).


What is the maximum speed of the broadband service?


What is the lite price of the broadband service?


What is the gold price of the broadband service?


What location has a few public wifi spots available to the public?


How long is the South Atlantic Express in miles?

The South Atlantic Express, a 10,000 km (6,214 mi) submarine communications cable connecting Africa to South America, run by the undersea fibre optic provider eFive, will pass St Helena relatively closely. There were no plans to land the cable and install a landing station ashore, which could supply St Helena's population with sufficient bandwidth to fully leverage the benefits of today's Information Society. In January 2012, a group of supporters petitioned the UK government to meet the cost of landing the cable at St Helena. On 6 October 2012, eFive agreed to reroute the cable through St. Helena after a successful lobbying campaign by A Human Right, a San Francisco-based NGA working on initiatives to ensure all people are connected to the Internet. Islanders have sought the assistance of the UK Department for International Development and Foreign and Commonwealth Office in funding the £10m required to bridge the connection from a local junction box on the cable to the island. The UK Government have announced that a review of the island's economy would be required before such funding would be agreed to.


On what date did eFive announce they would reroute the cable through Saint Helena?


Who lobbied for the cable reroute into South Helena?


How many local newspapers does the island have?

The island has two local newspapers, both of which are available on the Internet. The St Helena Independent has been published since November 2005. The Sentinel newspaper was introduced in 2012.


Since when has the St Helena Independent been published?


When was the Sentinel Newspaper introduced?


How many primary schools does the island have?

Education is free and compulsory between the ages of 5 and 16 The island has three primary schools for students of age 4 to 11: Harford, Pilling, and St Paul’s. Prince Andrew School provides secondary education for students aged 11 to 18. At the beginning of the academic year 2009-10, 230 students were enrolled in primary school and 286 in secondary school.


What is the name of the secondary school for the island?


How many students were enrolled in primary school in 2010?


When does the mobile library service operate?

The Education and Employment Directorate also offers programmes for students with special needs, vocational training, adult education, evening classes, and distance learning. The island has a public library (the oldest in the Southern Hemisphere) and a mobile library service which operates weekly rural areas.


Who provides programs to students with special needs?


The UK national curriculum is adapted for local use. A range of qualifications are offered – from GCSE, A/S and A2, to Level 3 Diplomas and VRQ qualifications:


Saint Helena is a member of what kind of association?

Sports played on the island include football, cricket, volleyball, tennis, golf, motocross, shooting sports and yachting. Saint Helena has sent teams to a number of Commonwealth Games. Saint Helena is a member of the International Island Games Association. The Saint Helena cricket team made its debut in international cricket in Division Three of the African region of the World Cricket League in 2011.


Where did the Saint Helena cricket team make it's debut in international cricket?


When did the Saint Helena cricket team make it's debut in international cricket?


Where does the Governor's cup take place?

The Governor's Cup is a yacht race between Cape Town and Saint Helena island, held every two years in December/January; the most recent event was in December 2010. In Jamestown a timed run takes place up Jacob's Ladder every year, with people coming from all over the world to take part.


What months does the Governor's cup take place?


When did the most recent Governor's cup take place?


What kind of groups are on Saint Helena and Ascension Island?

There are scouting and guiding groups on Saint Helena and Ascension Island. Scouting was established on Saint Helena island in 1912. Lord and Lady Baden-Powell visited the Scouts on Saint Helena on the return from their 1937 tour of Africa. The visit is described in Lord Baden-Powell's book entitled African Adventures.


When was Scouting established on Saint Helena?


Who visited the scouts on their return from the tour of Africa in 1937?


What book describes Lord and Lady Baden-Powel's visit?


Aspiration and preaspiration are used in what?

In phonetics, aspiration is the strong burst of breath that accompanies either the release or, in the case of preaspiration, the closure of some obstruents. In English, aspirated consonants are allophones in complementary distribution with their unaspirated counterparts, but in some other languages, notably most Indian and East Asian languages, the difference is contrastive.


Aspirated consonants are what in English?


What are two language types where the difference is contrastive?


With what word should you see a candle flicker or feel a puff of air?

To feel or see the difference between aspirated and unaspirated sounds, one can put a hand or a lit candle in front of one's mouth, and say pin [pʰɪn] and then spin [spɪn]. One should either feel a puff of air or see a flicker of the candle flame with pin that one does not get with spin. In most dialects of English, the initial consonant is aspirated in pin and unaspirated in spin.


In English the first consonant in "pin" is what?


In the International Phonetic Alphabet (IPA), aspirated consonants are written using the symbols for voiceless consonants followed by the aspiration modifier letter ⟨◌ʰ⟩, a superscript form of the symbol for the voiceless glottal fricative ⟨h⟩. For instance, ⟨p⟩ represents the voiceless bilabial stop, and ⟨pʰ⟩ represents the aspirated bilabial stop.


Written IPA consonants use symbols for what?


What modifier indicates a voiceless bilabial stop?


Voiced consonants are seldom actually aspirated. Symbols for voiced consonants followed by ⟨◌ʰ⟩, such as ⟨bʰ⟩, typically represent consonants with breathy voiced release (see below). In the grammatical tradition of Sanskrit, aspirated consonants are called voiceless aspirated, and breathy-voiced consonants are called voiced aspirated.


The symbol followed by bʰ would likely mean the consonant has what type of release?


Voiced aspirated consonants are what type?


There are no dedicated IPA symbols for degrees of aspiration and typically only two degrees are marked: unaspirated ⟨k⟩ and aspirated ⟨kʰ⟩. An old symbol for light aspiration was ⟨ʻ⟩, but this is now obsolete. The aspiration modifier letter may be doubled to indicate especially strong or long aspiration. Hence, the two degrees of aspiration in Korean stops are sometimes transcribed ⟨kʰ kʰʰ⟩ or ⟨kʻ⟩ and ⟨kʰ⟩, but they are usually transcribed [k] and [kʰ], with the details of voice-onset time given numerically.


What may be doubled to indicate a long aspiration?


What language, according to the text, may need double stops to indicate aspiration length?


How are voice-onset time details usually presented?


Preaspirated consonants are marked by placing the aspiration modifier letter before the consonant symbol: ⟨ʰp⟩ represents the preaspirated bilabial stop.


What represents a preaspirated bilabial stop?


How are unaspirated or tenuis consonants sometimes marked for unaspiration?

Unaspirated or tenuis consonants are occasionally marked with the modifier letter for unaspiration ⟨◌˭⟩, a superscript equal sign: ⟨t˭⟩. Usually, however, unaspirated consonants are left unmarked: ⟨t⟩.


Most often, unaspirated consonants are what?


How are unaspirated consonants left unmarked?


What is created when the vocal folds are spread and do not vibrate?

Voiceless consonants are produced with the vocal folds open (spread) and not vibrating, and voiced consonants are produced when the vocal folds are fractionally closed and vibrating (modal voice). Voiceless aspiration occurs when the vocal cords remain open after a consonant is released. An easy way to measure this is by noting the consonant's voice-onset time, as the voicing of a following vowel cannot begin until the vocal cords close.


What is created when vocal folds are slightly closed and vibrate?


What is it called when a person's vocal cords stay open after a consonant?


Aspiration of stops is seen as voiceless velar airflow in some languages, such as what?

Phonetically in some languages, such as Navajo, aspiration of stops tends to be realised as voiceless velar airflow; aspiration of affricates is realised as an extended length of the frication.


In Navajo, the aspiration of affricates can be seen as what?


In Eastern Armenian, aspirated consonants occur in what?

Aspirated consonants are not always followed by vowels or other voiced sounds. For example, in Eastern Armenian, aspiration is contrastive even word-finally, and aspirated consonants occur in consonant clusters. In Wahgi, consonants are aspirated only in final position.


Where are consonants aspirated in just the final position?


As well as lasting as long as an English aspirated stop, the Armenian and Cantonese aspiration lasts as long as what?

Armenian and Cantonese have aspiration that lasts about as long as English aspirated stops, in addition to unaspirated stops. Korean has lightly aspirated stops that fall between the Armenian and Cantonese unaspirated and aspirated stops as well as strongly aspirated stops whose aspiration lasts longer than that of Armenian or Cantonese. (See voice-onset time.)


Aspiration varies with place of articulation. The Spanish voiceless stops /p t k/ have voice-onset times (VOTs) of about 5, 10, and 30 milliseconds, whereas English aspirated /p t k/ have VOTs of about 60, 70, and 80 ms. Voice-onset time in Korean has been measured at 20, 25, and 50 ms for /p t k/ and 90, 95, and 125 for /pʰ tʰ kʰ/.


What happens when an aspirated consonant is doubled or geminated?

When aspirated consonants are doubled or geminated, the stop is held longer and then has an aspirated release. An aspirated affricate consists of a stop, fricative, and aspirated release. A doubled aspirated affricate has a longer hold in the stop portion and then has a release consisting of the fricative and aspiration.


What is comprised of a stop, fricative, and aspirated release?


What two languages mentioned have have preaspirated [ʰp ʰt ʰk]?

Icelandic and Faroese have preaspirated [ʰp ʰt ʰk]; some scholars interpret these as consonant clusters as well. In Icelandic, preaspirated stops contrast with double stops and single stops:


What do scholars say the preaspirated [ʰp ʰt ʰk] are too?


What do preaspirated stops contrast with in Icelandic?


Preaspirated stops also occur in most Sami languages; for example, in North Sami, the unvoiced stop and affricate phonemes /p/, /t/, /ts/, /tʃ/, /k/ are pronounced preaspirated ([ʰp], [ʰt] [ʰts], [ʰtʃ], [ʰk]) when they occur in medial or final position.


Which Sami tongue has unvoiced stop and affricate phonemes pronounced preaspirated?


How many contrastive aspirated fricatives does Choni Tibetan have?

Although most aspirated obstruents in the world's language are stops and affricates, aspirated fricatives such as [sʰ], [fʰ] or [ɕʰ] have been documented in Korean, in a few Tibeto-Burman languages, in some Oto-Manguean languages, and in the Siouan language Ofo. Some languages, such as Choni Tibetan, have up to four contrastive aspirated fricatives [sʰ] [ɕʰ], [ʂʰ] and [xʰ].


Indian languages commonly have murmured consonants instead of what?

True aspirated voiced consonants, as opposed to murmured (breathy-voice) consonants such as the [bʱ], [dʱ], [ɡʱ] that are common in the languages of India, are extremely rare. They have been documented in Kelabit Taa, and the Kx'a languages. Reported aspirated voiced stops, affricates and clicks are [b͡pʰ, d͡tʰ, d͡tsʰ, d͡tʃʰ, ɡ͡kʰ, ɢ͡qʰ, ᶢʘʰ, ᶢǀʰ, ᶢǁʰ, ᶢǃʰ, ᶢǂʰ].


True aspirated consonants are considered what?


True aspirated consonants have been found in Kelabit Taa and what else?


What has a different significance in various languages?

Aspiration has varying significance in different languages. It is either allophonic or phonemic, and may be analyzed as an underlying consonant cluster.


Aspiration is what, in English and some other languages?

In some languages, such as English, aspiration is allophonic. Stops are distinguished primarily by voicing, and voiceless stops are sometimes aspirated, while voiced stops are usually unaspirated.


When following a word such as spill, they are what for most speakers?

They are unaspirated for almost all speakers when immediately following word-initial s, as in spill, still, skill. After an s elsewhere in a word they are normally unaspirated as well, except sometimes in compound words. When the consonants in a cluster like st are analyzed as belonging to different morphemes (heteromorphemic) the stop is aspirated, but when they are analyzed as belonging to one morpheme the stop is unaspirated.[citation needed] For instance, distend has unaspirated [t] since it is not analyzed as two morphemes, but distaste has an aspirated middle [tʰ] because it is analyzed as dis- + taste and the word taste has an aspirated initial t.


If the letter s is a different place in the word, it is typical unaspirated unless the word is what?


If there is a cluster such as st and it belongs to different morphemes, the stop is what?


If the st belongs to one morpheme, then the stop is what?


In languages like Thai and Icelandic, tenuis and aspirated consonants are what?

In many languages, such as Armenian, Korean, Thai, Indo-Aryan languages, Dravidian languages, Icelandic, Ancient Greek, and the varieties of Chinese, tenuis and aspirated consonants are phonemic. Unaspirated consonants like [p˭ s˭] and aspirated consonants like [pʰ ʰp sʰ] are separate phonemes, and words are distinguished by whether they have one or the other.


[p˭ s˭] and [pʰ ʰp sʰ] are separate what?


How are lenis consonants distinguished from fortis consonants?

In Danish and most southern varieties of German, the "lenis" consonants transcribed for historical reasons as ⟨b d ɡ⟩ are distinguished from their fortis counterparts ⟨p t k⟩, mainly in their lack of aspiration.


If the lenis are ⟨b d ɡ⟩, what are the fortis counterparts?


Mandarin has stops and affricates that are distinguished by what?

Standard Chinese (Mandarin) has stops and affricates distinguished by aspiration: for instance, /t tʰ/, /t͡s t͡sʰ/. In pinyin, tenuis stops are written with letters that represent voiced consonants in English, and aspirated stops with letters that represent voiceless consonants. Thus d represents /t/, and t represents /tʰ/.


Tenuis stops have letters that are representative of English voiced consonant in what?


What kind of stops in pinyin are written with letters that representative of voiceless consonants?


What has a three-way distinction in regards to stops and affricates?

Wu Chinese has a three-way distinction in stops and affricates: /p pʰ b/. In addition to aspirated and unaspirated consonants, there is a series of muddy consonants, like /b/. These are pronounced with slack or breathy voice: that is, they are weakly voiced. Muddy consonants as initial cause a syllable to be pronounced with low pitch or light (陽 yáng) tone.


What is the actual distinction for Wu Chinese?


What is /b/ representative of, in addition to aspirated and unaspirated consonants?


What kind of voice are muddy consonants pronounced with?


How many distinctions in stops do languages like Bengali and Hindi have?

Many Indo-Aryan languages have aspirated stops. Sanskrit, Hindi, Bengali, Marathi, and Gujarati have a four-way distinction in stops: voiceless, aspirated, voiced, and breathy-voiced or voiced aspirated, such as /p pʰ b bʱ/. Punjabi has lost breathy-voiced consonants, which resulted in a tone system, and therefore has a distinction between voiceless, aspirated, and voiced: /p pʰ b/.


What is another term for voice-aspirated?


Telegu, Kannada and others are considered to be some of the what languages?

Some of the Dravidian languages, such as Telugu, Tamil, Malayalam, and Kannada, have a distinction between voiced and voiceless, aspirated and unaspirated only in loanwords from Indo-Aryan languages. In native Dravidian words, there is no distinction between these categories and stops are underspecified for voicing and aspiration.


What has no distinction between the categories of voiced, voiceless, aspirated and unaspirated?


What language has two-way distinctions between aspirated and voiced?

Western Armenian has a two-way distinction between aspirated and voiced: /tʰ d/. Western Armenian aspirated /tʰ/ corresponds to Eastern Armenian aspirated /tʰ/ and voiced /d/, and Western voiced /d/ corresponds to Eastern voiceless /t/.


Western Armenian /tʰ/ compares to eastern Armenian /tʰ/ and what?


The Western Armenian voiced /d/ compares to the Eastern Armenian voiceless what?


Early Greek (before Koine) have been redone with what?

Some forms of Greek before the Koine Greek period are reconstructed as having aspirated stops. The Classical Attic dialect of Ancient Greek had a three-way distinction in stops like Eastern Armenian: /t tʰ d/. These stops were called ψιλά, δασέα, μέσα "thin, thick, middle" by Koine Greek grammarians.


What Greek dialect had three-way stop distinction like Eastern Armenian?


Who referred to the Classical Attic dialect stops by the three distinctions?


What is the representation for the three places of articulation?

There were aspirated stops at three places of articulation: labial, coronal, and velar /pʰ tʰ kʰ/. Earlier Greek, represented by Mycenaean Greek, likely had a labialized velar aspirated stop /kʷʰ/, which later became labial, coronal, or velar depending on dialect and phonetic environment.


Whether a stop was labial, coronal or velar depended on what two things?


Dialects such as Aeolic and Doric had how many distinctions that were the same at one point in time?

The other Ancient Greek dialects, Ionic, Doric, Aeolic, and Arcadocypriot, likely had the same three-way distinction at one point, but Doric seems to have had a fricative in place of /tʰ/ in the Classical period, and the Ionic and Aeolic dialects sometimes lost aspiration (psilosis).


Which two dialects lost aspiration at times?


Rather than /tʰ/, what did the Doric dialect have in place during the Classical period?


Later, during the Koine Greek period, the aspirated and voiceless stops /tʰ d/ of Attic Greek lenited to voiceless and voiced fricatives, yielding /θ ð/ in Medieval and Modern Greek.


The lenited Attic Greek yielded /θ ð/ in what periods?


Aspiration may refer to a sound change of what?

The term aspiration sometimes refers to the sound change of debuccalization, in which a consonant is lenited (weakened) to become a glottal stop or fricative [ʔ h ɦ].


Debuccalization is when consonants are weakened to become what?


What is another term for a consonant being weakened?


So-called voiced aspirated consonants are nearly always pronounced instead with breathy voice, a type of phonation or vibration of the vocal folds. The modifier letter ⟨◌ʰ⟩ after a voiced consonant actually represents a breathy-voiced or murmured dental stop, as with the "voiced aspirated" bilabial stop ⟨bʰ⟩ in the Indo-Aryan languages. This consonant is therefore more accurately transcribed as ⟨b̤⟩, with the diacritic for breathy voice, or with the modifier letter ⟨bʱ⟩, a superscript form of the symbol for the voiced glottal fricative ⟨ɦ⟩.


The ⟨bʰ⟩ in the Indo-Aryan languages is better transcribed how for breathy voice?


What do some linguists restrict the double-dot subscript ⟨◌̤⟩ to?

Some linguists restrict the double-dot subscript ⟨◌̤⟩ to murmured sonorants, such as vowels and nasals, which are murmured throughout their duration, and use the superscript hook-aitch ⟨◌ʱ⟩ for the breathy-voiced release of obstruents.


What are, according to the text, murmured for their duration?


Hydrogen is a chemical element with chemical symbol H and atomic number 1. With an atomic weight of 7000100794000000000♠1.00794 u, hydrogen is the lightest element on the periodic table. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass.[note 1] Non-remnant stars are mainly composed of hydrogen in its plasma state. The most common isotope of hydrogen, termed protium (name rarely used, symbol 1H), has one proton and no neutrons.


What is the atomic number used for hydrogen?


What element is considered the lightest?


What form can you find hydrogen is on Earth?

The universal emergence of atomic hydrogen first occurred during the recombination epoch. At standard temperature and pressure, hydrogen is a colorless, odorless, tasteless, non-toxic, nonmetallic, highly combustible diatomic gas with the molecular formula H2. Since hydrogen readily forms covalent compounds with most non-metallic elements, most of the hydrogen on Earth exists in molecular forms such as in the form of water or organic compounds. Hydrogen plays a particularly important role in acid–base reactions as many acid-base reactions involve the exchange of protons between soluble molecules. In ionic compounds, hydrogen can take the form of a negative charge (i.e., anion) when it is known as a hydride, or as a positively charged (i.e., cation) species denoted by the symbol H+. The hydrogen cation is written as though composed of a bare proton, but in reality, hydrogen cations in ionic compounds are always more complex species than that would suggest. As the only neutral atom for which the Schrödinger equation can be solved analytically, study of the energetics and bonding of the hydrogen atom has played a key role in the development of quantum mechanics.


What is the molecular make-up of hydrogen?


What are three properties of hydrogen at normal temperature and normal pressure?


What charge does hydrogen display in ionic compounds when it is called a hydride?


What field of study has hydrogen and it's properties played a key role in development?


When was hydrogen gas artificially produced for the first time?

Hydrogen gas was first artificially produced in the early 16th century, via the mixing of metals with acids. In 1766–81, Henry Cavendish was the first to recognize that hydrogen gas was a discrete substance, and that it produces water when burned, a property which later gave it its name: in Greek, hydrogen means "water-former".


Who first recognized that hydrogen was a discrete substance?


When it is burned what does hydrogen make?


What is the Greek translation for hydrogen?


What market primarily uses ammonia production?

Industrial production is mainly from the steam reforming of natural gas, and less often from more energy-intensive hydrogen production methods like the electrolysis of water. Most hydrogen is employed near its production site, with the two largest uses being fossil fuel processing (e.g., hydrocracking) and ammonia production, mostly for the fertilizer market. Hydrogen is a concern in metallurgy as it can embrittle many metals, complicating the design of pipelines and storage tanks.


Name a process that uses fossil fuels along with hydrogen.


For hydrogen what is the enthalpy of combustion?

Hydrogen gas (dihydrogen or molecular hydrogen) is highly flammable and will burn in air at a very wide range of concentrations between 4% and 75% by volume. The enthalpy of combustion for hydrogen is −286 kJ/mol:


Which element has a enthalpy of combustion at −286 kJ/mol?


What kind of light do hydrogen-oxygen flames make?

Hydrogen gas forms explosive mixtures with air if it is 4–74% concentrated and with chlorine if it is 5–95% concentrated. The mixtures may be ignited by spark, heat or sunlight. The hydrogen autoignition temperature, the temperature of spontaneous ignition in air, is 500 °C (932 °F). Pure hydrogen-oxygen flames emit ultraviolet light and with high oxygen mix are nearly invisible to the naked eye, as illustrated by the faint plume of the Space Shuttle Main Engine compared to the highly visible plume of a Space Shuttle Solid Rocket Booster. The detection of a burning hydrogen leak may require a flame detector; such leaks can be very dangerous. Hydrogen flames in other conditions are blue, resembling blue natural gas flames. The destruction of the Hindenburg airship was an infamous example of hydrogen combustion; the cause is debated, but the visible orange flames were the result of a rich mixture of hydrogen to oxygen combined with carbon compounds from the airship skin.


H2 reacts with every oxidizing element. Hydrogen can react spontaneously and violently at room temperature with chlorine and fluorine to form the corresponding hydrogen halides, hydrogen chloride and hydrogen fluoride, which are also potentially dangerous acids.


What temperature does hydrogen react with these elements?


What model id used to calculate energy levels of hydrogen?

The energy levels of hydrogen can be calculated fairly accurately using the Bohr model of the atom, which conceptualizes the electron as "orbiting" the proton in analogy to the Earth's orbit of the Sun. However, the electromagnetic force attracts electrons and protons to one another, while planets and celestial objects are attracted to each other by gravity. Because of the discretization of angular momentum postulated in early quantum mechanics by Bohr, the electron in the Bohr model can only occupy certain allowed distances from the proton, and therefore only certain allowed energies.


What attracts planets and celestial items?


What does the electromagnetic force attract to one another?


What kind of movement does the electron not have in ground state?

A more accurate description of the hydrogen atom comes from a purely quantum mechanical treatment that uses the Schrödinger equation, Dirac equation or even the Feynman path integral formulation to calculate the probability density of the electron around the proton. The most complicated treatments allow for the small effects of special relativity and vacuum polarization. In the quantum mechanical treatment, the electron in a ground state hydrogen atom has no angular momentum at all—an illustration of how the "planetary orbit" conception of electron motion differs from reality.


There exist two different spin isomers of hydrogen diatomic molecules that differ by the relative spin of their nuclei. In the orthohydrogen form, the spins of the two protons are parallel and form a triplet state with a molecular spin quantum number of 1 (1⁄2+1⁄2); in the parahydrogen form the spins are antiparallel and form a singlet with a molecular spin quantum number of 0 (1⁄2–1⁄2). At standard temperature and pressure, hydrogen gas contains about 25% of the para form and 75% of the ortho form, also known as the "normal form". The equilibrium ratio of orthohydrogen to parahydrogen depends on temperature, but because the ortho form is an excited state and has a higher energy than the para form, it is unstable and cannot be purified. At very low temperatures, the equilibrium state is composed almost exclusively of the para form. The liquid and gas phase thermal properties of pure parahydrogen differ significantly from those of the normal form because of differences in rotational heat capacities, as discussed more fully in spin isomers of hydrogen. The ortho/para distinction also occurs in other hydrogen-containing molecules or functional groups, such as water and methylene, but is of little significance for their thermal properties.


What state are the protons in when in the orthohydrogen form?


When hydrogen gas is in standard temperature and pressure, what form is it considered in>


What percent of para form does hydrogen gas contain?


What percent of ortho form does hydrogen gas contain?


What are some catalysts used in hydrogen cooling

The uncatalyzed interconversion between para and ortho H2 increases with increasing temperature; thus rapidly condensed H2 contains large quantities of the high-energy ortho form that converts to the para form very slowly. The ortho/para ratio in condensed H2 is an important consideration in the preparation and storage of liquid hydrogen: the conversion from ortho to para is exothermic and produces enough heat to evaporate some of the hydrogen liquid, leading to loss of liquefied material. Catalysts for the ortho-para interconversion, such as ferric oxide, activated carbon, platinized asbestos, rare earth metals, uranium compounds, chromic oxide, or some nickel compounds, are used during hydrogen cooling.


What ind of charge does hydrogen take when mixed with electronegative particles?

While H2 is not very reactive under standard conditions, it does form compounds with most elements. Hydrogen can form compounds with elements that are more electronegative, such as halogens (e.g., F, Cl, Br, I), or oxygen; in these compounds hydrogen takes on a partial positive charge. When bonded to fluorine, oxygen, or nitrogen, hydrogen can participate in a form of medium-strength noncovalent bonding with other similar molecules between their hydrogens called hydrogen bonding, which is critical to the stability of many biological molecules. Hydrogen also forms compounds with less electronegative elements, such as the metals and metalloids, in which it takes on a partial negative charge. These compounds are often known as hydrides.


What type of charge does hydrogen take when combined with a metal?


When hydrogen forms with a metal, what is the compound called?


What is the form of hydrogen and carbon called?

Hydrogen forms a vast array of compounds with carbon called the hydrocarbons, and an even vaster array with heteroatoms that, because of their general association with living things, are called organic compounds. The study of their properties is known as organic chemistry and their study in the context of living organisms is known as biochemistry. By some definitions, "organic" compounds are only required to contain carbon. However, most of them also contain hydrogen, and because it is the carbon-hydrogen bond which gives this class of compounds most of its particular chemical characteristics, carbon-hydrogen bonds are required in some definitions of the word "organic" in chemistry. Millions of hydrocarbons are known, and they are usually formed by complicated synthetic pathways, which seldom involve elementary hydrogen.


What is the form of hydrogen and heteroatoms called?


What is the study of organic compounds properties known as?


What is the study of living organisms known as?


Organic compounds are only required to conatin what?


Who suggested that hydride anions existed?character does the H atom have in a hydride?

Compounds of hydrogen are often called hydrides, a term that is used fairly loosely. The term "hydride" suggests that the H atom has acquired a negative or anionic character, denoted H−, and is used when hydrogen forms a compound with a more electropositive element. The existence of the hydride anion, suggested by Gilbert N. Lewis in 1916 for group I and II salt-like hydrides, was demonstrated by Moers in 1920 by the electrolysis of molten lithium hydride (LiH), producing a stoichiometry quantity of hydrogen at the anode. For hydrides other than group I and II metals, the term is quite misleading, considering the low electronegativity of hydrogen. An exception in group II hydrides is BeH 2, which is polymeric. In lithium aluminium hydride, the AlH− 4 anion carries hydridic centers firmly attached to the Al(III).


What group of hydrides is BEH considered polymeric?


How many binary borane hydrides are known?

Although hydrides can be formed with almost all main-group elements, the number and combination of possible compounds varies widely; for example, there are over 100 binary borane hydrides known, but only one binary aluminium hydride. Binary indium hydride has not yet been identified, although larger complexes exist.


How many binary aluminum hydrides are there?


What chemistry do hydrides serve as bridging ligands?

In inorganic chemistry, hydrides can also serve as bridging ligands that link two metal centers in a coordination complex. This function is particularly common in group 13 elements, especially in boranes (boron hydrides) and aluminium complexes, as well as in clustered carboranes.


What do hydrides that are bridging ligands link up?


What group is briging ligands most common in?


When hydrogen oxidates, what is it removing?

Oxidation of hydrogen removes its electron and gives H+, which contains no electrons and a nucleus which is usually composed of one proton. That is why H+ is often called a proton. This species is central to discussion of acids. Under the Bronsted-Lowry theory, acids are proton donors, while bases are proton acceptors.


When hydrogen oxidates, what does it end up giving?


What theory suggests that acids are proton donors?


A bare proton, H+, cannot exist in solution or in ionic crystals, because of its unstoppable attraction to other atoms or molecules with electrons. Except at the high temperatures associated with plasmas, such protons cannot be removed from the electron clouds of atoms and molecules, and will remain attached to them. However, the term 'proton' is sometimes used loosely and metaphorically to refer to positively charged or cationic hydrogen attached to other species in this fashion, and as such is denoted "H+" without any implication that any single protons exist freely as a species.


To avoid the implication of the naked "solvated proton" in solution, acidic aqueous solutions are sometimes considered to contain a less unlikely fictitious species, termed the "hydronium ion" (H 3O+). However, even in this case, such solvated hydrogen cations are more realistically conceived as being organized into clusters that form species closer to H 9O+ 4. Other oxonium ions are found when water is in acidic solution with other solvents.


What other term is a solvated protons referred as?


What kind of molecular hydrogen is the H+3 knows as?

Although exotic on Earth, one of the most common ions in the universe is the H+ 3 ion, known as protonated molecular hydrogen or the trihydrogen cation.


What kind of cation is the H+3 knowns as?


How many natural isotopes does hydrogen have>

Hydrogen has three naturally occurring isotopes, denoted 1H, 2H and 3H. Other, highly unstable nuclei (4H to 7H) have been synthesized in the laboratory but not observed in nature.


Which element is the only that has different names for its isotopes?

Hydrogen is the only element that has different names for its isotopes in common use today. During the early study of radioactivity, various heavy radioactive isotopes were given their own names, but such names are no longer used, except for deuterium and tritium. The symbols D and T (instead of 2H and 3H) are sometimes used for deuterium and tritium, but the corresponding symbol for protium, P, is already in use for phosphorus and thus is not available for protium. In its nomenclatural guidelines, the International Union of Pure and Applied Chemistry allows any of D, T, 2H, and 3H to be used, although 2H and 3H are preferred.


What are the only two names still used for radioactive isotopes?


What are the symbols used for deuterium and tritium?


What are the preferred symbols for deuterium and tritium?


What year was the discovery of hydrogen gas?

In 1671, Robert Boyle discovered and described the reaction between iron filings and dilute acids, which results in the production of hydrogen gas. In 1766, Henry Cavendish was the first to recognize hydrogen gas as a discrete substance, by naming the gas from a metal-acid reaction "flammable air". He speculated that "flammable air" was in fact identical to the hypothetical substance called "phlogiston" and further finding in 1781 that the gas produces water when burned. He is usually given credit for its discovery as an element. In 1783, Antoine Lavoisier gave the element the name hydrogen (from the Greek ὑδρο- hydro meaning "water" and -γενής genes meaning "creator") when he and Laplace reproduced Cavendish's finding that water is produced when hydrogen is burned.


Who recognized hydrogen gas as a discreet substance?


In what year did Henry Cavendish recognize hydrogen gas as a discreet substance?


How did Lavoisier produce hydrogen for his experiments?

Lavoisier produced hydrogen for his experiments on mass conservation by reacting a flux of steam with metallic iron through an incandescent iron tube heated in a fire. Anaerobic oxidation of iron by the protons of water at high temperature can be schematically represented by the set of following reactions:


Who was the first to liquidize hydrogen?

Hydrogen was liquefied for the first time by James Dewar in 1898 by using regenerative cooling and his invention, the vacuum flask. He produced solid hydrogen the next year. Deuterium was discovered in December 1931 by Harold Urey, and tritium was prepared in 1934 by Ernest Rutherford, Mark Oliphant, and Paul Harteck. Heavy water, which consists of deuterium in the place of regular hydrogen, was discovered by Urey's group in 1932. François Isaac de Rivaz built the first de Rivaz engine, an internal combustion engine powered by a mixture of hydrogen and oxygen in 1806. Edward Daniel Clarke invented the hydrogen gas blowpipe in 1819. The Döbereiner's lamp and limelight were invented in 1823.


In what year Did James Dewar first liquidize hydrogen?


Who was the first to discover deuterium?


Who invented the hydrogen filled balloons?

The first hydrogen-filled balloon was invented by Jacques Charles in 1783. Hydrogen provided the lift for the first reliable form of air-travel following the 1852 invention of the first hydrogen-lifted airship by Henri Giffard. German count Ferdinand von Zeppelin promoted the idea of rigid airships lifted by hydrogen that later were called Zeppelins; the first of which had its maiden flight in 1900. Regularly scheduled flights started in 1910 and by the outbreak of World War I in August 1914, they had carried 35,000 passengers without a serious incident. Hydrogen-lifted airships were used as observation platforms and bombers during the war.


What year was hydrogen filled balloons invented?


what were the hydrogen lifted airships called?


In what year did the first zeppelin make flight?


Who made the first non stop transatlantic crossing?

The first non-stop transatlantic crossing was made by the British airship R34 in 1919. Regular passenger service resumed in the 1920s and the discovery of helium reserves in the United States promised increased safety, but the U.S. government refused to sell the gas for this purpose. Therefore, H2 was used in the Hindenburg airship, which was destroyed in a midair fire over New Jersey on 6 May 1937. The incident was broadcast live on radio and filmed. Ignition of leaking hydrogen is widely assumed to be the cause, but later investigations pointed to the ignition of the aluminized fabric coating by static electricity. But the damage to hydrogen's reputation as a lifting gas was already done.


What year did the airship get destroyed?


What city was the ship over when it caught fire?


In what year did the first hydrogen cooled turbogenerator go into service?

In the same year the first hydrogen-cooled turbogenerator went into service with gaseous hydrogen as a coolant in the rotor and the stator in 1937 at Dayton, Ohio, by the Dayton Power & Light Co.; because of the thermal conductivity of hydrogen gas, this is the most common type in its field today.


What state is the Dayton Power and light Company located?


What year was the first nickel hydrogen battery used?

The nickel hydrogen battery was used for the first time in 1977 aboard the U.S. Navy's Navigation technology satellite-2 (NTS-2). For example, the ISS, Mars Odyssey and the Mars Global Surveyor are equipped with nickel-hydrogen batteries. In the dark part of its orbit, the Hubble Space Telescope is also powered by nickel-hydrogen batteries, which were finally replaced in May 2009, more than 19 years after launch, and 13 years over their design life.


In what year did the hubble space telescope finally get the nickel hydrogen battery?


Because of its simple atomic structure, consisting only of a proton and an electron, the hydrogen atom, together with the spectrum of light produced from it or absorbed by it, has been central to the development of the theory of atomic structure. Furthermore, the corresponding simplicity of the hydrogen molecule and the corresponding cation H+ 2 allowed fuller understanding of the nature of the chemical bond, which followed shortly after the quantum mechanical treatment of the hydrogen atom had been developed in the mid-1920s.


What theory is the hydrogen atom a big part of?


When was the quantum mechanical treatment of the hydrogen atom developed?


Who observed the specific heat capacity of H2?

One of the first quantum effects to be explicitly noticed (but not understood at the time) was a Maxwell observation involving hydrogen, half a century before full quantum mechanical theory arrived. Maxwell observed that the specific heat capacity of H2 unaccountably departs from that of a diatomic gas below room temperature and begins to increasingly resemble that of a monatomic gas at cryogenic temperatures. According to quantum theory, this behavior arises from the spacing of the (quantized) rotational energy levels, which are particularly wide-spaced in H2 because of its low mass. These widely spaced levels inhibit equal partition of heat energy into rotational motion in hydrogen at low temperatures. Diatomic gases composed of heavier atoms do not have such widely spaced levels and do not exhibit the same effect.


What cause H2 to resemble monatomic gas?


What percent of normal matter is hydrogen?

Hydrogen, as atomic H, is the most abundant chemical element in the universe, making up 75% of normal matter by mass and over 90% by number of atoms (most of the mass of the universe, however, is not in the form of chemical-element type matter, but rather is postulated to occur as yet-undetected forms of mass such as dark matter and dark energy). This element is found in great abundance in stars and gas giant planets. Molecular clouds of H2 are associated with star formation. Hydrogen plays a vital role in powering stars through the proton-proton reaction and the CNO cycle nuclear fusion.


What 2 forms of mass is most of the universe consisted of?


In what states is hydrogen mostly found in the universe?

Throughout the universe, hydrogen is mostly found in the atomic and plasma states whose properties are quite different from molecular hydrogen. As a plasma, hydrogen's electron and proton are not bound together, resulting in very high electrical conductivity and high emissivity (producing the light from the Sun and other stars). The charged particles are highly influenced by magnetic and electric fields. For example, in the solar wind they interact with the Earth's magnetosphere giving rise to Birkeland currents and the aurora. Hydrogen is found in the neutral atomic state in the interstellar medium. The large amount of neutral hydrogen found in the damped Lyman-alpha systems is thought to dominate the cosmological baryonic density of the Universe up to redshift z=4.


Hydrogens electron and proton are not bound together in what state?


in the interstellar medium, what state is hydrogen in?


The neutral hydrogen found in the damped Lyman-alpha systems dominates what?


How abundant is hydrogen on the earths surface?

Under ordinary conditions on Earth, elemental hydrogen exists as the diatomic gas, H2. However, hydrogen gas is very rare in the Earth's atmosphere (1 ppm by volume) because of its light weight, which enables it to escape from Earth's gravity more easily than heavier gases. However, hydrogen is the third most abundant element on the Earth's surface, mostly in the form of chemical compounds such as hydrocarbons and water. Hydrogen gas is produced by some bacteria and algae and is a natural component of flatus, as is methane, itself a hydrogen source of increasing importance.


What molecular form is found in the interstellar medium?

A molecular form called protonated molecular hydrogen (H+ 3) is found in the interstellar medium, where it is generated by ionization of molecular hydrogen from cosmic rays. This charged ion has also been observed in the upper atmosphere of the planet Jupiter. The ion is relatively stable in the environment of outer space due to the low temperature and density. H+ 3 is one of the most abundant ions in the Universe, and it plays a notable role in the chemistry of the interstellar medium. Neutral triatomic hydrogen H3 can only exist in an excited form and is unstable. By contrast, the positive hydrogen molecular ion (H+ 2) is a rare molecule in the universe.


What generates protonated molecular hydrogen?


On what planet can you find protonated molecular hydrogen?


In what way can Neutral triatomic hydrogen exist?


H 2 is produced in chemistry and biology laboratories, often as a by-product of other reactions; in industry for the hydrogenation of unsaturated substrates; and in nature as a means of expelling reducing equivalents in biochemical reactions.


What is an easy way to produce hydrogen?

The electrolysis of water is a simple method of producing hydrogen. A low voltage current is run through the water, and gaseous oxygen forms at the anode while gaseous hydrogen forms at the cathode. Typically the cathode is made from platinum or another inert metal when producing hydrogen for storage. If, however, the gas is to be burnt on site, oxygen is desirable to assist the combustion, and so both electrodes would be made from inert metals. (Iron, for instance, would oxidize, and thus decrease the amount of oxygen given off.) The theoretical maximum efficiency (electricity used vs. energetic value of hydrogen produced) is in the range 80–94%.


Where does the gaseous hydrogen form at?


When you combine an alloy of alluminum and gallium to water, what do you get?

An alloy of aluminium and gallium in pellet form added to water can be used to generate hydrogen. The process also produces alumina, but the expensive gallium, which prevents the formation of an oxide skin on the pellets, can be re-used. This has important potential implications for a hydrogen economy, as hydrogen can be produced on-site and does not need to be transported.


The most economical way to prepare hydrogen involves removing it from what?

Hydrogen can be prepared in several different ways, but economically the most important processes involve removal of hydrogen from hydrocarbons. Commercial bulk hydrogen is usually produced by the steam reforming of natural gas. At high temperatures (1000–1400 K, 700–1100 °C or 1300–2000 °F), steam (water vapor) reacts with methane to yield carbon monoxide and H 2.


What temperature is needed for steam to react with methane?


This reaction is favored at low pressures but is nonetheless conducted at high pressures (2.0 MPa, 20 atm or 600 inHg). This is because high-pressure H 2 is the most marketable product and Pressure Swing Adsorption (PSA) purification systems work better at higher pressures. The product mixture is known as "synthesis gas" because it is often used directly for the production of methanol and related compounds. Hydrocarbons other than methane can be used to produce synthesis gas with varying product ratios. One of the many complications to this highly optimized technology is the formation of coke or carbon:


Besides methane, what else can be used to produce synthesis gas?


Consequently, steam reforming typically employs an excess of H 2O. Additional hydrogen can be recovered from the steam by use of carbon monoxide through the water gas shift reaction, especially with an iron oxide catalyst. This reaction is also a common industrial source of carbon dioxide:


When hydrogen is generated from natural gas, what des it produce?

Hydrogen is sometimes produced and consumed in the same industrial process, without being separated. In the Haber process for the production of ammonia, hydrogen is generated from natural gas. Electrolysis of brine to yield chlorine also produces hydrogen as a co-product.


How is hydrogen produced as a co product?


What are the thermochemical cycyles in a testing phase for?

There are more than 200 thermochemical cycles which can be used for water splitting, around a dozen of these cycles such as the iron oxide cycle, cerium(IV) oxide–cerium(III) oxide cycle, zinc zinc-oxide cycle, sulfur-iodine cycle, copper-chlorine cycle and hybrid sulfur cycle are under research and in testing phase to produce hydrogen and oxygen from water and heat without using electricity. A number of laboratories (including in France, Germany, Greece, Japan, and the USA) are developing thermochemical methods to produce hydrogen from solar energy and water.


What are labs trying to produce hydrogen from?


What condition is iron and steel alloys slowly oxidized?

Under anaerobic conditions, iron and steel alloys are slowly oxidized by the protons of water concomitantly reduced in molecular hydrogen (H 2). The anaerobic corrosion of iron leads first to the formation of ferrous hydroxide (green rust) and can be described by the following reaction:


What does the anaerobic corrosion of iron lead to?


What is another name for formation of ferrous hydroxide?


Under what condition can ferrous hydroxide be oxidized?

In its turn, under anaerobic conditions, the ferrous hydroxide (Fe(OH) 2 ) can be oxidized by the protons of water to form magnetite and molecular hydrogen. This process is described by the Schikorr reaction:


How is hydrogen produced when there is no atmospheric oxygen?

In the absence of atmospheric oxygen (O 2), in deep geological conditions prevailing far away from Earth atmosphere, hydrogen (H 2) is produced during the process of serpentinization by the anaerobic oxidation by the water protons (H+) of the ferrous (Fe2+) silicate present in the crystal lattice of the fayalite (Fe 2SiO 4, the olivine iron-endmember). The corresponding reaction leading to the formation of magnetite (Fe 3O 4), quartz (SiO 2) and hydrogen (H 2) is the following:


What is the most common gas found in power tranformers?

From all the fault gases formed in power transformers, hydrogen is the most common and is generated under most fault conditions; thus, formation of hydrogen is an early indication of serious problems in the transformer's life cycle.


Where are large quantities of H2 needed?

Large quantities of H 2 are needed in the petroleum and chemical industries. The largest application of H 2 is for the processing ("upgrading") of fossil fuels, and in the production of ammonia. The key consumers of H 2 in the petrochemical plant include hydrodealkylation, hydrodesulfurization, and hydrocracking. H 2 has several other important uses. H 2 is used as a hydrogenating agent, particularly in increasing the level of saturation of unsaturated fats and oils (found in items such as margarine), and in the production of methanol. It is similarly the source of hydrogen in the manufacture of hydrochloric acid. H 2 is also used as a reducing agent of metallic ores.


What are the consumers of H2 in petrochemical plant?


Hydrogen is highly soluble in many rare earth and transition metals and is soluble in both nanocrystalline and amorphous metals. Hydrogen solubility in metals is influenced by local distortions or impurities in the crystal lattice. These properties may be useful when hydrogen is purified by passage through hot palladium disks, but the gas's high solubility is a metallurgical problem, contributing to the embrittlement of many metals, complicating the design of pipelines and storage tanks.


What influences hydrogens solubility in metals?


Apart from its use as a reactant, H 2 has wide applications in physics and engineering. It is used as a shielding gas in welding methods such as atomic hydrogen welding. H2 is used as the rotor coolant in electrical generators at power stations, because it has the highest thermal conductivity of any gas. Liquid H2 is used in cryogenic research, including superconductivity studies. Because H 2 is lighter than air, having a little more than 1⁄14 of the density of air, it was once widely used as a lifting gas in balloons and airships.


How is H2 used in electrical generators at power stations?


Why would one use hydrogen mixed with nitrogen?

In more recent applications, hydrogen is used pure or mixed with nitrogen (sometimes called forming gas) as a tracer gas for minute leak detection. Applications can be found in the automotive, chemical, power generation, aerospace, and telecommunications industries. Hydrogen is an authorized food additive (E 949) that allows food package leak testing among other anti-oxidizing properties.


What industries can you find these applications?


How is hydrogen used as a food additive?


What isotope is used in nuclear fission?

Hydrogen's rarer isotopes also each have specific applications. Deuterium (hydrogen-2) is used in nuclear fission applications as a moderator to slow neutrons, and in nuclear fusion reactions. Deuterium compounds have applications in chemistry and biology in studies of reaction isotope effects. Tritium (hydrogen-3), produced in nuclear reactors, is used in the production of hydrogen bombs, as an isotopic label in the biosciences, and as a radiation source in luminous paints.


Hydrogen is commonly used in power stations as a coolant in generators due to a number of favorable properties that are a direct result of its light diatomic molecules. These include low density, low viscosity, and the highest specific heat and thermal conductivity of all gases.


Is Hydrogen considered an energy resource?

Hydrogen is not an energy resource, except in the hypothetical context of commercial nuclear fusion power plants using deuterium or tritium, a technology presently far from development. The Sun's energy comes from nuclear fusion of hydrogen, but this process is difficult to achieve controllably on Earth. Elemental hydrogen from solar, biological, or electrical sources require more energy to make it than is obtained by burning it, so in these cases hydrogen functions as an energy carrier, like a battery. Hydrogen may be obtained from fossil sources (such as methane), but these sources are unsustainable.


How does hydrogen function when it s burned?


What form of hydrogen has been discussed as a ussage for fuel?

The energy density per unit volume of both liquid hydrogen and compressed hydrogen gas at any practicable pressure is significantly less than that of traditional fuel sources, although the energy density per unit fuel mass is higher. Nevertheless, elemental hydrogen has been widely discussed in the context of energy, as a possible future carrier of energy on an economy-wide scale. For example, CO 2 sequestration followed by carbon capture and storage could be conducted at the point of H 2 production from fossil fuels. Hydrogen used in transportation would burn relatively cleanly, with some NOx emissions, but without carbon emissions. However, the infrastructure costs associated with full conversion to a hydrogen economy would be substantial. Fuel cells can convert hydrogen and oxygen directly to electricity more efficiently than internal combustion engines.


Hydrogen is employed to saturate broken ("dangling") bonds of amorphous silicon and amorphous carbon that helps stabilizing material properties. It is also a potential electron donor in various oxide materials, including ZnO, SnO2, CdO, MgO, ZrO2, HfO2, La2O3, Y2O3, TiO2, SrTiO3, LaAlO3, SiO2, Al2O3, ZrSiO4, HfSiO4, and SrZrO3.


How is hydrogen used in oxide materials?


What oxide materials use hydrogen as an electron donor?


H2 is a product of some types of anaerobic metabolism and is produced by several microorganisms, usually via reactions catalyzed by iron- or nickel-containing enzymes called hydrogenases. These enzymes catalyze the reversible redox reaction between H2 and its component two protons and two electrons. Creation of hydrogen gas occurs in the transfer of reducing equivalents produced during pyruvate fermentation to water. The natural cycle of hydrogen production and consumption by organisms is called the hydrogen cycle.


What is the natural cycle of hydrogen production and consumption by organisms called?


What is the decomposition of water into its components called?

Water splitting, in which water is decomposed into its component protons, electrons, and oxygen, occurs in the light reactions in all photosynthetic organisms. Some such organisms, including the alga Chlamydomonas reinhardtii and cyanobacteria, have evolved a second step in the dark reactions in which protons and electrons are reduced to form H2 gas by specialized hydrogenases in the chloroplast. Efforts have been undertaken to genetically modify cyanobacterial hydrogenases to efficiently synthesize H2 gas even in the presence of oxygen. Efforts have also been undertaken with genetically modified alga in a bioreactor.


What threats can hydrogen cause to human saftey?

Hydrogen poses a number of hazards to human safety, from potential detonations and fires when mixed with air to being an asphyxiant in its pure, oxygen-free form. In addition, liquid hydrogen is a cryogen and presents dangers (such as frostbite) associated with very cold liquids. Hydrogen dissolves in many metals, and, in addition to leaking out, may have adverse effects on them, such as hydrogen embrittlement, leading to cracks and explosions. Hydrogen gas leaking into external air may spontaneously ignite. Moreover, hydrogen fire, while being extremely hot, is almost invisible, and thus can lead to accidental burns.


What can hydrogen embrittlement lead to?


What do physical and chemical properties of hydrogen depend on?

Even interpreting the hydrogen data (including safety data) is confounded by a number of phenomena. Many physical and chemical properties of hydrogen depend on the parahydrogen/orthohydrogen ratio (it often takes days or weeks at a given temperature to reach the equilibrium ratio, for which the data is usually given). Hydrogen detonation parameters, such as critical detonation pressure and temperature, strongly depend on the container geometry.


How long can it take to reach the equilibrium ratio?


What do Hydrogen detonation parameters depend on?


What do people typically call a web browser?

A web browser (commonly referred to as a browser) is a software application for retrieving, presenting, and traversing information resources on the World Wide Web. An information resource is identified by a Uniform Resource Identifier (URI/URL) and may be a web page, image, video or other piece of content. Hyperlinks present in resources enable users easily to navigate their browsers to related resources.


What allows a person to direct their browser to a resource?


The primary function of a browser is to use what?

Although browsers are primarily intended to use the World Wide Web, they can also be used to access information provided by web servers in private networks or files in file systems.


In addition to accessing the Internet, browsers can also access info that is put there by web servers in what?


The first web browser was invented in 1990 by Sir Tim Berners-Lee. Berners-Lee is the director of the World Wide Web Consortium (W3C), which oversees the Web's continued development, and is also the founder of the World Wide Web Foundation. His browser was called WorldWideWeb and later renamed Nexus.


What organization did Berners-Lee create?


In 1993, browser software was further innovated by Marc Andreessen with the release of Mosaic, "the world's first popular browser", which made the World Wide Web system easy to use and more accessible to the average person. Andreesen's browser sparked the internet boom of the 1990s. The introduction of Mosaic in 1993 – one of the first graphical web browsers – led to an explosion in web use. Andreessen, the leader of the Mosaic team at National Center for Supercomputing Applications (NCSA), soon started his own company, named Netscape, and released the Mosaic-influenced Netscape Navigator in 1994, which quickly became the world's most popular browser, accounting for 90% of all web use at its peak (see usage share of web browsers).


When Andreessen left the company he worked for, what new company did he start?


What browser did Andreessen release in 1994?


Who released the Internet Explorer browser?

Microsoft responded with its Internet Explorer in 1995, also heavily influenced by Mosaic, initiating the industry's first browser war. Bundled with Windows, Internet Explorer gained dominance in the web browser market; Internet Explorer usage share peaked at over 95% by 2002.


When did Microsoft release Internet Explorer?


The release of Internet Explorer started the first what?


What was bundled with Internet Explorer?


Opera debuted in 1996; it has never achieved widespread use, having less than 2% browser usage share as of February 2012 according to Net Applications. Its Opera-mini version has an additive share, in April 2011 amounting to 1.1% of overall browser use, but focused on the fast-growing mobile phone web browser market, being preinstalled on over 40 million phones. It is also available on several other embedded systems, including Nintendo's Wii video game console.


What accounted for 1.1% of browser use in April 2011?


Opera focused on which quickly growing market?


Opera is also available on which video game console?


In 1998, Netscape launched what was to become the Mozilla Foundation in an attempt to produce a competitive browser using the open source software model. That browser would eventually evolve into Firefox, which developed a respectable following while still in the beta stage of development; shortly after the release of Firefox 1.0 in late 2004, Firefox (all versions) accounted for 7% of browser use. As of August 2011, Firefox has a 28% usage share.


Netscape wanted to have a competitive browser using what?


What was the resulting browser for the Mozilla Foundation?


When was the first beta release for Safari?

Apple's Safari had its first beta release in January 2003; as of April 2011, it had a dominant share of Apple-based web browsing, accounting for just over 7% of the entire browser market.


Which browser is the newest to enter the field?

The most recent major entrant to the browser market is Chrome, first released in September 2008. Chrome's take-up has increased significantly year by year, by doubling its usage share from 8% to 16% by August 2011. This increase seems largely to be at the expense of Internet Explorer, whose share has tended to decrease from month to month. In December 2011, Chrome overtook Internet Explorer 8 as the most widely used web browser but still had lower usage than all versions of Internet Explorer combined. Chrome's user-base continued to grow and in May 2012, Chrome's usage passed the usage of all versions of Internet Explorer combined. By April 2014, Chrome's usage had hit 45%.


As Chrome usage increases, which browser usage has continued to decrease?


When did Chrome become more used than all versions of Internet Explorer?


What was bundled for free with the Windows OS?

Internet Explorer, on the other hand, was bundled free with the Windows operating system (and was also downloadable free), and therefore it was funded partly by the sales of Windows to computer manufacturers and direct to users. Internet Explorer also used to be available for the Mac. It is likely that releasing IE for the Mac was part of Microsoft's overall strategy to fight threats to its quasi-monopoly platform dominance - threats such as web standards and Java - by making some web developers, or at least their managers, assume that there was "no need" to develop for anything other than Internet Explorer. In this respect, IE may have contributed to Windows and Microsoft applications sales in another way, through "lock-in" to Microsoft's browser.


Internet Explorer was partially funded in what two ways?


What other OS could use Internet Explorer?


Who investigated the bundling of the IE browser with Windows OS?

In January 2009, the European Commission announced it would investigate the bundling of Internet Explorer with Windows operating systems from Microsoft, saying "Microsoft's tying of Internet Explorer to the Windows operating system harms competition between web browsers, undermines product innovation and ultimately reduces consumer choice." Microsoft Corp v Commission


When did the European Commission say they would investigate the bundling?


The Commission felt that bundling the browser with Windows computers harmed what?


The Commission felt that the bundling undermined what?


What browser was automatically included with OS X?

Safari and Mobile Safari were likewise always included with OS X and iOS respectively, so, similarly, they were originally funded by sales of Apple computers and mobile devices, and formed part of the overall Apple experience to customers.


Which company pays Firefox to make their search engine the default on their browser?

Today, most commercial web browsers are paid by search engine companies to make their engine default, or to include them as another option. For example, Google pays Mozilla, the maker of Firefox, to make Google Search the default search engine in Firefox. Mozilla makes enough money from this deal that it does not need to charge users for Firefox. In addition, Google Search is also (as one would expect) the default search engine in Google Chrome. Users searching for websites or items on the Internet would be led to Google's search results page, increasing ad revenue and which funds development at Google and of Google Chrome.


What other browser has Google as the default search engine?


The increased revenue funds what, in addition to Google?


The primary purpose of a web browser is to bring information resources to the user ("retrieval" or "fetching"), allowing them to view the information ("display", "rendering"), and then access other information ("navigation", "following links").


This process begins when the user inputs a Uniform Resource Locator (URL), for example http://en.wikipedia.org/, into the browser. The prefix of the URL, the Uniform Resource Identifier or URI, determines how the URL will be interpreted. The most commonly used kind of URI starts with http: and identifies a resource to be retrieved over the Hypertext Transfer Protocol (HTTP). Many browsers also support a variety of other prefixes, such as https: for HTTPS, ftp: for the File Transfer Protocol, and file: for local files. Prefixes that the web browser cannot directly handle are often handed off to another application entirely. For example, mailto: URIs are usually passed to the user's default e-mail application, and news: URIs are passed to the user's default newsgroup reader.


What is the determining factor in how a URL will be interpreted?


A news: prefix is given to the user's what?


What is it called when content is changed from markup to an interactive document?

In the case of http, https, file, and others, once the resource has been retrieved the web browser will display it. HTML and associated content (image files, formatting information such as CSS, etc.) is passed to the browser's layout engine to be transformed from markup to an interactive document, a process known as "rendering". Aside from HTML, web browsers can generally display any kind of content that can be part of a web page. Most browsers can display images, audio, video, and XML files, and often have plug-ins to support Flash applications and Java applets. Upon encountering a file of an unsupported type or a file that is set up to be downloaded rather than displayed, the browser prompts the user to save the file to disk.


Browsers typically have plug-ins to support what?


What can resources have to connect to other resources?

Information resources may contain hyperlinks to other information resources. Each link contains the URI of a resource to go to. When a link is clicked, the browser navigates to the resource indicated by the link's target URI, and the process of bringing content to the user begins again.


Features on a browser can range from minimal with little support to what?

Available web browsers range in features from minimal, text-based user interfaces with bare-bones support for HTML to rich user interfaces supporting a wide variety of file formats and protocols. Browsers which include additional components to support e-mail, Usenet news, and Internet Relay Chat (IRC), are sometimes referred to as "Internet suites" rather than merely "web browsers".


When a browser includes a lot of extras, it can be referred to as what?


What does not allow windows to pop up without consent?

All major web browsers allow the user to open multiple information resources at the same time, either in different browser windows or in different tabs of the same window. Major browsers also include pop-up blockers to prevent unwanted windows from "popping up" without the user's consent.


A computer program that continues the functionality of a browser is called what?

A browser extension is a computer program that extends the functionality of a web browser. Every major web browser supports the development of browser extensions.


A list of websites a user can click to get back to easy have been what by the user?

Most web browsers can display a list of web pages that the user has bookmarked so that the user can quickly return to them. Bookmarks are also called "Favorites" in Internet Explorer. In addition, all major web browsers have some form of built-in web feed aggregator. In Firefox, web feeds are formatted as "live bookmarks" and behave like a folder of bookmarks corresponding to recent entries in the feed. In Opera, a more traditional feed reader is included which stores and displays the contents of the feed.


What are "bookmarks" called in Internet Explorer?


Most browsers support HTTP Secure and offer quick and easy ways to delete the web cache, download history, form and search history, cookies, and browsing history. For a comparison of the current security vulnerabilities of browsers, see comparison of web browsers.


Cache, download history, cookies, browsing and what else can be quickly deleted in browsers?


A comparison of browser must be seen to know what?


Quick development of what kind of browsers led to non-standard HTML dialects?

Early web browsers supported only a very simple version of HTML. The rapid development of proprietary web browsers led to the development of non-standard dialects of HTML, leading to problems with interoperability. Modern web browsers support a combination of standards-based and de facto HTML and XHTML, which should be rendered in the same way by all browsers.


Modern browser support standards-based and defacto what?


HTML and XHTML should be what by all browsers?


A user interface, UI backend, layout engine and other things are part of what?

Web browsers consist of a user interface, layout engine, rendering engine, JavaScript interpreter, UI backend, networking component and data persistence component. These components achieve different functionalities of a web browser and together provide all capabilities of a web browser.


The layout engine, rendering engine, user interface and other things are components that offer different what of web browsers?


Boston (pronounced i/ˈbɒstən/) is the capital and largest city of the Commonwealth of Massachusetts in the United States. Boston also served as the historic county seat of Suffolk County until Massachusetts disbanded county government in 1999. The city proper covers 48 square miles (124 km2) with an estimated population of 655,884 in 2014, making it the largest city in New England and the 24th largest city in the United States. The city is the economic and cultural anchor of a substantially larger metropolitan area called Greater Boston, home to 4.7 million people and the tenth-largest metropolitan statistical area in the country. Greater Boston as a commuting region is home to 8.1 million people, making it the sixth-largest combined statistical area in the United States.


What is the approximate population for 2014?


How many square miles does Boston cover?


What was the population of Boston in 2014


What place is Boston in for largest city in the US?


Which of the United States is Boston located in?


How many square miles is the city proper of Boston?


The large metropolitan area of Boston is also called what?


What is the estimated population of Greater Boston?


What is the capital and largest city in Massachusetts?


One of the oldest cities in the United States, Boston was founded on the Shawmut Peninsula in 1630 by Puritan settlers from England. It was the scene of several key events of the American Revolution, such as the Boston Massacre, the Boston Tea Party, the Battle of Bunker Hill, and the Siege of Boston. Upon American independence from Great Britain, the city continued to be an important port and manufacturing hub, as well as a center for education and culture. Through land reclamation and municipal annexation, Boston has expanded beyond the original peninsula. Its rich history attracts many tourists, with Faneuil Hall alone drawing over 20 million visitors per year. Boston's many firsts include the United States' first public school, Boston Latin School (1635), and first subway system (1897).


List one major event that took place in Boston.


How many people visit Faneuil Hall annually?


What is the name of the peninsula Boston was founded on?


Bostons rich history attracts many what each year?


The Faneuil Hall draws over how many tourists to Boston each year?


What ranks in the top of the country for investment?

The area's many colleges and universities make Boston an international center of higher education and medicine, and the city is considered to be a world leader in innovation. Boston's economic base also includes finance, professional and business services, biotechnology, information technology, and government activities. Households in the city claim the highest average rate of philanthropy in the United States; businesses and institutions rank amongst the top in the country for environmental sustainability and investment. The city has one of the highest costs of living in the United States, though it remains high on world livability rankings.


Households in Boston claim the highest average rate of what in the United States?


Bostons businesses rank top in the country for what?


Where does Boston rank as far as cost of living in the United States?


How does Boston rank on world livability?


Boston is internationally known for education and medicine because of its many what?


What was the name before the city was called Boston?

Boston's early European settlers had first called the area Trimountaine (after its "three mountains"—only traces of which remain today) but later renamed it Boston after Boston, Lincolnshire, England, the origin of several prominent colonists. The renaming, on September 7, 1630 (Old Style),[b] was by Puritan colonists from England, who had moved over from Charlestown earlier that year in quest of fresh water. Their settlement was initially limited to the Shawmut Peninsula, at that time surrounded by the Massachusetts Bay and Charles River and connected to the mainland by a narrow isthmus. The peninsula is known to have been inhabited as early as 5000 BC.


What did Boston's early settlers call the area?


What were the puritan colonists searching for when they came to Boston?


What year was the Cambridge Agreement signed?

In 1629, the Massachusetts Bay Colony's first governor, John Winthrop, led the signing of the Cambridge Agreement, a key founding document of the city. Puritan ethics and their focus on education influenced its early history; America's first public school was founded in Boston in 1635. Over the next 130 years, the city participated in four French and Indian Wars, until the British defeated the French and their native allies in North America. Boston was the largest town in British North America until Philadelphia grew larger in the mid 18th century.


America's first public school was founded in Boston in what year?


How many french and Indian wars did Boston participate in?


Who led the signing of the Cambridge Agreement?


Boston became one of the wealthiest international ports after what war?

Many of the crucial events of the American Revolution—the Boston Massacre, the Boston Tea Party, Paul Revere's midnight ride, the battles of Lexington and Concord and Bunker Hill, the Siege of Boston, and many others—occurred in or near Boston. After the Revolution, Boston's long seafaring tradition helped make it one of the world's wealthiest international ports, with rum, fish, salt, and tobacco being particularly important.


What long held tradition helped make Boston a wealthy port?


Boston was the location of many important events of what war?


What act was put in place during the Napoleonic wars and the war of 1812?

The Embargo Act of 1807, adopted during the Napoleonic Wars, and the War of 1812 significantly curtailed Boston's harbor activity. Although foreign trade returned after these hostilities, Boston's merchants had found alternatives for their capital investments in the interim. Manufacturing became an important component of the city's economy, and by the mid-19th century, the city's industrial manufacturing overtook international trade in economic importance. Until the early 20th century, Boston remained one of the nation's largest manufacturing centers and was notable for its garment production and leather-goods industries. A network of small rivers bordering the city and connecting it to the surrounding region facilitated shipment of goods and led to a proliferation of mills and factories. Later, a dense network of railroads furthered the region's industry and commerce.


What act cut down on Boston's harbor activity?


What became an important part of the city's economy during the Napoleonic Wars and the war of 1812?


In what century was manufacturing more important to Boston than trade?


When did Boston stop being known for it's garment production and leather goods?


What was the name given to old Boston families?

During this period Boston flourished culturally as well, admired for its rarefied literary life and generous artistic patronage, with members of old Boston families—eventually dubbed Boston Brahmins—coming to be regarded as the nation's social and cultural elites.


Who came to be known as the nation's social elites?


Boston was admired for what kind of life?


Boston improved culturally because of its generous what?


Boston was overtaken by Salem, Massachusetts in what type of trade?

Boston was an early port of the Atlantic triangular slave trade in the New England colonies, but was soon overtaken by Salem, Massachusetts and Newport, Rhode Island. Eventually Boston became a center of the abolitionist movement. The city reacted strongly to the Fugitive Slave Law of 1850, contributing to President Franklin Pierce's attempt to make an example of Boston after the Anthony Burns Fugitive Slave Case.


What movement did Boston become the center of after it stopped slave trade?


What law involving slaves did the city react strongly to?


What President attempted to make an example out of Boston due to it's view on the Anthony Burns Fugitive Slave Case?


What was the City of Boston's name before it was the City of Boston?

In 1822, the citizens of Boston voted to change the official name from "the Town of Boston" to "the City of Boston", and on March 4, 1822, the people of Boston accepted the charter incorporating the City. At the time Boston was chartered as a city, the population was about 46,226, while the area of the city was only 4.7 square miles (12 km2).


What year was the name changes to the City of Boston?


What was the population of Boston in 1822?


How many square miles was the city in 1822?


How did Boston's population change in the 1820's?

In the 1820s, Boston's population grew rapidly, and the city's ethnic composition changed dramatically with the first wave of European immigrants. Irish immigrants dominated the first wave of newcomers during this period, especially following the Irish Potato Famine; by 1850, about 35,000 Irish lived in Boston. In the latter half of the 19th century, the city saw increasing numbers of Irish, Germans, Lebanese, Syrians, French Canadians, and Russian and Polish Jews settled in the city. By the end of the 19th century, Boston's core neighborhoods had become enclaves of ethnically distinct immigrants—Italians inhabited the North End, Irish dominated South Boston and Charlestown, and Russian Jews lived in the West End. Irish and Italian immigrants brought with them Roman Catholicism. Currently, Catholics make up Boston's largest religious community, and since the early 20th century, the Irish have played a major role in Boston politics—prominent figures include the Kennedys, Tip O'Neill, and John F. Fitzgerald.