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Balsa

Balsa

Balsa (Ochroma lagopus, synonym O. pyramidale) is a large, fast-growing tree to 30 m tall, native from tropical South America north to southern Mexico. It is evergreen, or dry-season deciduous if the dry season is long, with large (30–50 cm) weakly palmately lobed leaves. The name balsa derives from Spanish for a raft. The timber is very soft and light with a coarse open grain. The density of balsa wood ranges from 100–200 kg/m³, with a typical density of about 140 kg/m³ (about one third the density of ordinary wood). This makes it a very popular material for model making and buoyancy materials (lifebelts, etc.), and was famously used by Thor Heyerdahl in his raft Kon-Tiki. It is also used to make very light, stiff structures in wooden light aeroplanes, typically sandwiched between two pieces of thin plywood. Despite being very soft, balsa is classified as a hardwood, the softest commercial hardwood.

See also


- Balsa (email client)
- Softwood

External links


- [http://ctfs.si.edu/webatlas/english/ochrpy.html Species description]
- [http://www.tfts.org/ochroma_lagopus.htm Photo of foliage and flower]
- [http://www.museumsnett.no/kon-tiki/ Kon-Tiki museum website]
- [http://www.itis.usda.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=21602 ITIS 21602] Category:Malvaceae Category: wood

Tree

, the tallest tree species on earth]] A tree can be defined as a large, perennial, woody plant. Though there is no set definition regarding minimum size, the term generally applies to plants at least 6 m (20 ft) high at maturity and, more importantly, having secondary branches supported on a single main stem or trunk (see shrub for comparison). Compared with most other plant forms, trees are long-lived. A few species of trees grow to 100 m tall, and some can live for several thousand years. Trees are important components of the natural landscape and significant elements in landscaping, and in agriculture supplying orchard crops (such as apples). Trees also play an important role in many of the world's mythologies (see Tree (mythology)).

Classifications

Tree (mythology)]] A tree is a plant form and trees occur in many different orders and families of plants. Trees thus show a wide variety of growth form, leaf type and shape, bark characteristics, reproductive structures, etc. The earliest trees were tree ferns and horsetails, which grew in vast forests in the Carboniferous Period; tree ferns still survive, but the only surviving horsetails are not of tree form. Later, in the Triassic Period, conifers, ginkgos, cycads and other gymnosperms appeared, and subsequently flowering plants in the Cretaceous Period. Most species of trees today are flowering plants and conifers. The listing below gives examples of many well-known trees and how they are typically classified. A small group of trees growing together is called a grove or copse, and a landscape covered by a dense growth of trees is called a forest. Several biotopes are defined largely by the trees that inhabit them; examples are rainforest and taiga (see ecozones). A landscape of trees scattered or spaced across grassland (usually grazed or burned over periodically) is called a savanna.

Morphology

The basic parts of a tree are the roots, trunk(s), branches, twigs and leaves. Tree stems consist mainly of support and transport tissues (xylem and phloem). Wood consists of xylem cells, and bark is made of phloem and other tissues external to the vascular cambium. Trees may be broadly grouped into exogenous and endogenous trees according to the way in which their stem diameter increases. Exogenous trees, which comprise the great majority of modern trees (all conifers, and all broadleaf trees), grow by the addition of new wood outwards, immediately under the bark. Endogenous trees, mainly in the monocotyledons (e.g. palms), grow by addition of new material inwards. As an exogenous tree grows, it creates growth rings. In temperate climates, these are commonly visible due to changes in the rate of growth with temperature variation over an annual cycle. These rings can be counted to determine the age of the tree, and used to date cores or even wood taken from trees in the past; this practice is known as the science of dendrochronology. In some tropical regions with constant year-round climate, growth is continuous and distinct rings are not formed, so age determination is impossible. Age determination is also impossible in endogenous trees. dendrochronology, Chile]] The roots of a tree are generally embedded in earth, providing anchorage for the above-ground biomass and absorbing water and nutrients from the soil. Above ground, the trunk gives height to the leaf-bearing branches, aiding in competition with other plant species for sunlight. In many trees, the arrangement of the branches optimizes exposure of the leaves to sunlight. Not all trees have all the plant organs or parts mentioned above. For example, most palm trees are not branched, the saguaro cactus of North America has no functional leaves, tree ferns do not produce bark, etc. Based on their general shape and size, all of these are nonetheless generally regarded as trees. Indeed, sometimes size is the more important consideration. A plant form that is similar to a tree, but generally having smaller, multiple trunks and/or branches that arise near the ground, is called a shrub. However, no sharp differentiation between shrubs and trees is possible. Given their small size, bonsai plants would not technically be 'trees', but one should not confuse reference to the form of a species with the size or shape of individual specimens. A spruce seedling does not fit the definition of a tree, but all spruces are trees. Bamboos by contrast, do show most of the characteristics of trees, yet are rarely called trees.

Champion trees

The world's champion trees can be considered on several factors; height, trunk diameter or girth, total size, and age. It is significant that in each case, the top position is always held by a conifer, though a different species in each case; in most measures, the second to fourth places are also held by conifers. ;Tallest trees The heights of the tallest trees in the world have been the subject of considerable dispute and much (often wild) exaggeration. Modern verified measurement with laser rangefinders combined with tape drop measurements made by tree climbers, carried out by the [http://www.uark.edu/misc/ents/home.htm U.S. Eastern Native Tree Society] has shown that most older measuring methods and measurements are unreliable, often producing exaggerations of 5% to 15% above the real height. Historical claims of trees of 114 m, 117 m, 130 m, and even 150 m, are now largely disregarded as unreliable, fantasy or outright fraud. The following are now accepted as the top five tallest reliably measured species: # Coast Redwood Sequoia sempervirens: 112.83 m, Humboldt Redwoods State Park, California ([http://www.conifers.org/cu/se/index.htm Gymnosperm Database]) # Coast Douglas-fir Pseudotsuga menziesii: 100.3 m, Brummit Creek, Coos County, Oregon ([http://www.conifers.org/pi/ps/menziesii2.htm Gymnosperm Database]) # Sitka Spruce Picea sitchensis: 96.7 m, Prairie Creek Redwoods State Park, California ([http://www.conifers.org/pi/pic/sitchensis.htm Gymnosperm Database]) # Giant Sequoia Sequoiadendron giganteum: 93.6 m, Redwood Mountain Grove, California ([http://www.conifers.org/cu/se2/index.htm Gymnosperm Database]) # Australian Mountain-ash Eucalyptus regnans: 92.0 m, Styx Valley, Tasmania ([http://www.forestrytas.com.au/forestrytas/tasfor/tasforests_12/tasfor_12_09.pdf Forestry Tasmania] [pdf file]) ;Stoutest trees The girth (circumference) of a tree is – or at least should be – much easier to measure than the height, as it is a simple matter of stretching a tape round the trunk, and pulling it taut to find the circumference. Despite this, U.K. tree author Alan Mitchell made the following comment about measurements of yew trees in the British Isles: :"The aberrations of past measurements of yews are beyond belief. For example, the tree at Tisbury has a well-defined, clean, if irregular bole at least 1.5 m long. It has been found to have a girth which has dilated and shrunk in the following way: 11.28 m (1834 Loudon), 9.3 m (1892 Lowe), 10.67 m (1903 Elwes and Henry), 9.0 m (1924 E. Swanton), 9.45 m (1959 Mitchell) .... Earlier measurements have therefore been omitted". As a general standard, tree girth is taken at 'breast height'; this is defined differently in different situations, with most foresters measuring girth at 1.3 m above ground, while ornamental tree measurers usually measure at 1.5 m above ground; in most cases this makes little difference to the measured girth. On sloping ground, the "above ground" reference point is usually taken as the highest point on the ground touching the trunk, but some use the average between the highest and lowest points of ground. Some of the inflated old measurements may have been taken at ground level. Some past exaggerated measurements also result from measuring the complete next-to-bark measurement, pushing the tape in and out over every crevice and buttress. Modern trends are to cite the tree's diameter rather than the circumference; this is obtained by dividing the measured circumference by π; it assumes the trunk is circular in cross-section (an oval or irregular cross-section would result in a mean diameter slightly greater than the assumed circle). This is cited as dbh (diameter at breast height) in tree literature. A further problem with measuring baobabs Adansonia is that these trees store large amounts of water in the very soft wood in their trunks. This leads to marked variation in their girth over the year, swelling to a maximum at the end of the rainy season, minimum at the end of the dry season. Although baobabs have some of the highest girth measurements of any trees, no accurate measurements are currently available, but probably do not exceed 10-11 m diameter. The stoutest species in diameter, excluding baobabs, are: # Montezuma Cypress Taxodium mucronatum: 11.42 m, Árbol del Tule, Santa Maria del Tule, Oaxaca, Mexico (A. F. Mitchell, International Dendrology Society Year Book 1983: 93, 1984). # Giant Sequoia Sequoiadendron giganteum: 8.85 m, General Grant tree, Grant Grove, California ([http://www.conifers.org/cu/se2/index.htm Gymnosperm Database]) # Coast Redwood Sequoia sempervirens: 7.44 m, Prairie Creek Redwoods State Park, California ([http://www.conifers.org/cu/se/index.htm Gymnosperm Database]) ;Largest trees The largest trees in total volume are those which are both tall and of large diameter, and in particular, which hold a large diameter high up the trunk. Measurement is very complex, particularly if branch volume is to be included as well as the trunk volume, so measurements have only been made for a small number of trees, and generally only for the trunk. No attempt has ever been made to include root volume. The top four species measured so far are ([http://www.conifers.org/topics/biggest.htm Gymnosperm Database]): # Giant Sequoia Sequoiadendron giganteum: 1489 m³, General Sherman tree # Coast Redwood Sequoia sempervirens: 1045 m³, Del Norte Titan tree # Western Redcedar Thuja plicata: 500 m³, Quinault Lake Redcedar # Kauri Agathis australis: 400 m³, Tane Mahuta tree (total volume, including branches, 516.7 m³)
However, the Alerce Fitzroya cupressoides, as yet un-measured, may well slot in at third or fourth place, and Montezuma Cypress Taxodium mucronatum is also likely to be high in the list. The largest angiosperm tree is a Australian Mountain-ash, the 'El Grande' tree of about 380 m³ in Tasmania. ;Oldest trees The oldest trees are determined by growth ring counts in cores taken from the edge to the centre of the tree or from entire cross-sections. Accurate determination is only possible for trees which produce growth rings, generally those which occur in seasonal climates; trees in uniform non-seasonal tropical climates grow continuously and do not have distinct growth rings. It is also only possible for trees which are solid to the centre of the tree; many very old trees become hollow as the dead heartwood decays away. For some of these species, age estimates have been made on the basis of extrapolating current growth rates, but the results are usually little better than guesswork or wild speculation. The verified oldest measured ages are ([http://www.conifers.org/topics/oldest.htm Gymnosperm Database]): # Great Basin Bristlecone Pine Pinus longaeva: 4844 years # Alerce Fitzroya cupressoides: 3622 years # Giant Sequoia Sequoia sempervirens: 3266 years # Huon-pine Lagarostrobos franklinii: 2500 years # Rocky Mountains Bristlecone Pine Pinus aristata: 2435 years Other species suspected of reaching exceptional age include European Yew Taxus baccata (probably over 3000 years) and Western Redcedar Thuja plicata. The oldest verified age for an angiosperm tree is 2293 years for the Sri Maha Bodhi Sacred Fig (Ficus religiosa) planted in 288 BC at Anuradhapura, Sri Lanka; this is also the oldest human-planted tree with a known planting date.

Major tree genera

Flowering plants (Magnoliophyta; angiosperms)

Dicotyledons (Magnoliopsida; broadleaf or hardwood trees)


- Anacardiaceae (Cashew family)
  - Cashew, Anacardium occidentale
  - Mango, Mangifera indica
  - Pistachio, Pistacia vera
  - Sumac, Rhus species
  - Lacquer tree, Toxicodendron verniciflua
- Annonaceae (Custard apple family)
  - Cherimoya Annona cherimola
  - Custard apple Annona reticulata
  - Pawpaw Asimina triloba
  - Soursop Annona muricata
- Apocynaceae (Dogbane family)
  - Pachypodium Pachypodium species
- Aquifoliaceae (Holly family)
  - Holly, Ilex species
- Araliaceae (Ivy family)
  - Kalopanax, Kalopanax pictus Kalopanax tree (background) in fall]]
- Betulaceae (Birch family)
  - Alder, Alnus species
  - Birch, Betula species
  - Hornbeam, Carpinus species
  - Hazel, Corylus species
- Bignoniaceae (family)
  - Catalpa, Catalpa species
- Cactaceae (Cactus family)
  - Saguaro, Carnegiea gigantea
- Cannabaceae (Cannabis family)
  - Hackberry, Celtis species
- Cornaceae (Dogwood family)
  - Dogwood, Cornus species
- Dipterocarpaceae family
  - Garjan Dipterocarpus species
  - Sal Shorea species
- Ericaceae (Heath family)
  - Arbutus, Arbutus species
- Eucommiaceae (Eucommia family)
  - Eucommia Eucommia ulmoides
- Fabaceae (Pea family)
  - Acacia, Acacia species
  - Honey locust, Gleditsia triacanthos
  - Black locust, Robinia pseudoacacia
  - Laburnum, Laburnum species
  - Pau Brasil, Brazilwood, Caesalpinia echinata
- Fagaceae (Beech family )
  - Chestnut, Castanea species
  - Beech, Fagus species
  - Southern beech, Nothofagus species
  - Tanoak, Lithocarpus densiflorus
  - Oak, Quercus species
- Fouquieriaceae (Boojum family)
  - Boojum, Fouquieria columnaris
- Hamamelidaceae (Witch-hazel family)
  - Sweetgum, Liquidambar species
  - Persian Ironwood, Parrotia persica
- Juglandaceae (Walnut family)
  - Walnut, Juglans species
  - Hickory, Carya species
  - Wingnut, Pterocarya species
- Lauraceae (Laurel family)
  - Cinnamon Cinnamomum zeylanicum
  - Bay Laurel Laurus nobilis
  - Avocado Persea americana
- Lecythidaceae (Paradise nut family)
  - Brazil Nut Bertholletia excelsa
- Lythraceae Loosestrife family
  - Crape-myrtle Lagerstroemia species
- Magnoliaceae (Magnolia family)
  - Tulip tree, Liriodendron species
  - Magnolia, Magnolia species
- Malvaceae (Mallow family; including Tiliaceae and Bombacaceae) Bombacaceae
  - Baobab, Adansonia species
  - Silk-cotton tree, Bombax species
  - Bottletrees, Brachychiton species
  - Kapok, Ceiba pentandra
  - Durian, Durio zibethinus
  - Balsa, Ochroma lagopus
  - Cacao (cocoa), Theobroma cacao
  - Linden (Basswood, Lime), Tilia species
- Meliaceae (Mahogany family)
  - Neem, Azadirachta indica
  - Bead tree, Melia azedarach
  - Mahogany, Swietenia mahagoni
- Moraceae (Mulberry family)
  - Fig, Ficus species
  - Mulberry, Morus species
- Myristicaceae (Nutmeg family)
  - Nutmeg, Mysristica fragrans
- Myrtaceae (Myrtle family)
  - Eucalyptus, Eucalyptus species
  - Myrtle, Myrtus species
  - Guava, Psidium guajavaGuava in flower]]
- Nyssaceae (Tupelo family; sometimes included in Cornaceae)
  - Tupelo, Nyssa species
  - Dove tree, Davidia involucrata
- Oleaceae (Olive family)
  - Olive, Olea europaea
  - Ash, Fraxinus species
- Paulowniaceae (Paulownia family)
  - Foxglove Tree, Paulownia species
- Platanaceae (Plane family)
  - Plane, Platanus species
- Rhizophoraceae (Mangrove family)
  - Red Mangrove, Rhizophora mangle
- Rosaceae (Rose family)
  - Rowans, Whitebeams, Service Trees Sorbus species
  - Hawthorn, Crataegus species
  - Pear, Pyrus species
  - Apple, Malus species
  - Almond, Prunus dulcis
  - Peach, Prunus persica
  - Plum, Prunus domestica
  - Cherry, Prunus species
- Rubiaceae (Bedstraw family)
  - Coffee, Coffea species
- Rutaceae (Rue family)
  - Citrus, Citrus species
  - Cork-tree, Phellodendron species
  - Euodia, Tetradium species
- Salicaceae (Willow family)
  - Aspen, Populus species
  - Poplar, Populus species
  - Willow, Salix species Willow
- Sapindaceae (including Aceraceae, Hippocastanaceae) (Soapberry family)
  - Maple, Acer species
  - Buckeye, Horse-chestnut, Aesculus species
  - Mexican Buckeye, Ungnadia speciosa
  - Lychee, Litchi sinensis
  - Golden rain tree, Koelreuteria paniculata
- Sapotaceae (Sapodilla family)
  - Gutta-percha, Palaquium species
  - Tambalacoque, or "dodo tree", Sideroxylon grandiflorum, previously Calvaria major
- Simaroubaceae family
  - Tree of heaven, Ailanthus species
- Theaceae (Camellia family)
  - Gordonia, Gordonia species
  - Stuartia, Stuartia species
- Thymelaeaceae (Thymelaea family)
  - Ramin, Gonystylus species
- Ulmaceae (Elm family)
  - Elm, Ulmus species
  - Zelkova, Zelkova species
- Verbenaceae family
  - Teak, Tectona species

Monocotyledons (Liliopsida)

Monocotyledon
- Agavaceae (Agave family)
  - Cabbage tree, Cordyline australis
  - Dragon tree, Dracaena draco
  - Joshua tree, Yucca brevifolia
- Arecaceae (Palmae) (Palm family)
  - Areca Nut, Areca catechu
  - Coconut Cocos nucifera
  - Date Palm, Phoenix dactylifera
  - Chusan Palm, Trachycarpus fortunei
- Poaceae (grass family)
  - Bamboos Poaceae subfamily Bambusoideae
- Note that banana 'trees' are not actually trees; they are not woody nor is the stalk perennial.

Conifers (Pinophyta; softwood trees)


- Araucariaceae (Araucaria family)
  - Araucaria, Araucaria species
  - Kauri, Agathis species
- Cupressaceae (Cypress family)
  - Cypress, Cupressus species
  - Cypress, Chamaecyparis species
  - Juniper, Juniperus species
  - Alerce or Patagonian cypress, Fitzroya cupressoides
  - Sugi, Cryptomeria japonica
  - Coast Redwood, Sequoia sempervirens
  - Giant Sequoia, Sequoiadendron giganteum
  - Dawn Redwood, Metasequoia glyptostroboides
  - Bald Cypress, Taxodium distichum
- Pinaceae (Pine family)
  - White pine, Pinus species
  - Pinyon pine, Pinus species
  - Pine, Pinus species
  - Spruce, Picea species
  - Larch, Larix species
  - Douglas-fir, Pseudotsuga species
  - Fir, Abies species
  - Cedar, Cedrus species
- Podocarpaceae (Yellowwood family)
  - African Yellowwood, Afrocarpus falcatus
  - Totara, Podocarpus totara
- Sciadopityaceae
  - Kusamaki, Sciadopitys species
- Taxaceae (Yew family)
  - Yew, Taxus species

Ginkgos (Ginkgophyta)


- Ginkgoaceae (Ginkgo family)
  - Ginkgo, Ginkgo biloba

Cycads (Cycadophyta)


- Cycadaceae family
  - Ngathu cycad, Cycas angulata
- Zamiaceae family
  - Wunu cycad, Lepidozamia hopei

Ferns (Pterophyta)


- Cyatheaceae and Dicksoniaceae families
  - Tree ferns, Cyathea, Alsophila, Dicksonia (not a monophyletic group)

Life stages

The life cycles of trees, especially conifers, are divided into the following stages in forestry for survey and documentation purposes: # Seed # Seedling: the above ground part of the embryo that sprout from the seed # Sapling: After the seedling reaches 1m tall, and until it reaches 7cm in stem diameter # Pole: young trees from 7-30cm diameter # Mature tree: over 30cm diameter, reproductive years begin # Old tree: dominate old growth forest; height growth slows greatly, with majority of productivity in seed production # Overmature: dieback and decay become common # Snag: standing dead wood # Log/debris: fallen dead wood Tree diameters are measured at height of between 1.3-1.5m above the highest point on the ground at its base. The 7cm diameter definition is economically based, from the smallest saleable stem size (for paper production, etc), and the 30cm diameter is the smallest base diameter for sawlogs. Each stage may be uniquely perceptive to different pathogens and suitable for especially adapted arboreal animals.

See also


- Arboretum
  - Pinetum
- Arboriculture (the care of trees)
- Bonsai
- Christmas tree
- Dendrology (the study of trees)
  - Dendrochronology
  - Dendroclimatology
- Ecology
  - Tree-line
- Forestry
  - Deforestation
  - Plantation
  - Urban Forestry
  - Woodland management
- Fruit trees
- List of famous trees
- List of garden plants
- Plants
- Prehistoric plants
- Tree climbing
- Trees in mythology
- Trees of the world
  - Trees of Britain and Ireland
  - Trees of Canada
  - List of U.S. state trees
  - Trees of The Caribbean Basin
  - Trees of Iran
  - List of trees of New Zealand
- Wood
  - List of woods

External links


- [http://www.globaltrees.org/default.asp GLOBAL TREES .org] Campaigning to save the world's most threatened trees
- [http://www.fssca.net/romero/ Romero Memorial Tree Project] Plant a tree in El Salvador

Bibliography


- Pakenham, T. (2002). Remarkable Trees of the World. ISBN 0297843001
- Pakenham, T. (1996). Meetings with Remarkable Trees. ISBN 0297832557 Category:Plants
-
- Category:Botany Category: plant morphology ms:Pokok ja:木 simple:Tree th:ต้นไม้

Tropical

The tropics are the geographic region of the Earth centered on the equator and limited in latitude by the two tropics: the Tropic of Cancer in the northern hemisphere and the Tropic of Capricorn in the southern hemisphere. This area lies approximately between 23°30'/23.5° N latitude and 23°30'/23.5° S latitude, and includes all the parts of the Earth where the sun reaches a point directly overhead at least once during the solar year. (In the temperate zones, north of the Tropic of Cancer and south of the Tropic of Capricorn, the sun never reaches an altitude of 90° or directly overhead.) The word "tropics" comes from Greek tropos meaning "turn", because the apparent position of the Sun oscillates between the two tropics with a period that defines the average length of a year. Tropical plants and animals are those species native to the tropics. Tropical is also sometimes used in a general sense of a place that is warm and moist year-round, often with the sense of lush vegetation. However, there are places in the tropics that are anything but "tropical" in this sense, with even alpine tundra and snow-capped peaks, including Mauna Kea, Mt. Kilimanjaro, and the Andes as far south as the northernmost parts of Chile and Argentina. In Köppen's scheme of climate classification, a tropical climate is defined as a non-arid climate in which all twelve months have mean temperatures above 18 °C (64.4 °F).

Examples of tropical cities


- Bombay, India (19.1º N)
- Hong Kong, Hong Kong SAR, People's Republic of China (22.3º N)
- Rio de Janeiro, Brazil (22.9º S)
- Singapore (1.4º N)
- Manila, Philippines (14.6º N)
- Cairns, Queensland, Australia (16.7º S)

See also


- Subtropical
- Tropical year
- Tropical disease Category:Climate ko:열대 ja:熱帯 zh-min-nan:Jia̍t-tài

South America

South America is a continent, with most of its area in the Southern Hemisphere. South America is situated between the Pacific Ocean and the Atlantic Ocean. Commonly referred to as part of America, like North America, South America is named after Amerigo Vespucci, who was the first European to suggest that the Americas were not the East Indies, but a previously undiscovered New World. South America has an area of 17,821,601 km² (6,880,959 sq mi), or almost 3.5% of the Earth's surface. As of 2005, its population was estimated at more than 371,200,000. South America ranks fourth in area (after Asia, Africa, and North America) and fifth in population (after Asia, Africa, Europe, and North America).Europe __TOC__

Geography

The classification of its geographic location is subject to dispute, as in some non-English speaking regions of the world, the Americas are a continent and North, Central and South America are its subcontinents. In English-speaking and certain other regions of the world, North and South America are considered to be continents and their union is referred to as the supercontinent of the Americas. The classification given to South America, as a subcontinent in a continent or a continent in a supercontinent, depends entirely on regional preferences. It became attached to North America only recently (geologically speaking) with the formation of the Isthmus of Panama some 3 million years ago, which resulted in the Great American Interchange. The Andes, likewise a comparatively young and seismically restless mountain range, run down the western edge of the continent; the land to the east of the Andes is largely tropical rain forest, the vast Amazon River basin. The continent also contains drier regions such as Patagonia and the extremely arid Atacama desert. The region of South America also includes various islands, most of which belong to countries on the continent. The Caribbean territories are grouped with North America. The South American nations that border the Caribbean Sea – including Colombia, Venezuela, Guyana, Suriname, and French Guiana – are also known as Caribbean South America. Major natural resources are copper, iron ore, tin and oil. The many resources in South America have become useful around the world, but they have failed to diversify their economies. This has lead to major highs and lows in their economy causing instability. South America is home to many interesting species of animals including parrots, tarantulas, snakes, and mammals. The largest country in South America by far, in both area and population, is Brazil followed by Argentina. Regions in South America include the Andean States, the Guianas, the Southern Cone, and Eastern South America.

History

South America is thought to have been first inhabited by people crossing the Bering Land Bridge, now the Bering strait, though there are also suggestions of migration from the southern Pacific Ocean.

Chavín

The Chavín established a trade network and developed agriculture by 900 BC, according to some estimates and archeological finds. Artifacts were found at a site called Chavín de Huantar in modern Peru at an elevation of 3,177 meters. Chavín civilization spanned 900 BC to 300 BC.

Inca

Holding their capital at the great city of Cusco, the Inca civilization dominated the Andes region from 1438 to 1533. Known as Tahuantinsuyu, or "the land of the four regions," in Quechua, the Inca culture was highly distinct and developed. Cities were built with precise, unmatched stonework, constructed over many levels of mountain terrain. Terrace farming was a useful form of agriculture. There is evidence of excellent metalwork and even successful brain surgery in Inca civilization.

European colonization

Before arrival of Europeans, an estimated 30 million people lived in South America. brain surgery In 1494, Portugal and Spain, the two great maritime powers of that time, on the expectation of new lands being discovered in the west, signed the Treaty of Tordesillas, by which they agreed that all the land outside Europe should be an exclusive duopoly between the two countries. The Treaty established an imaginary line along a north-south meridian 370 leagues west of Cape Verde Islands, roughly 46° 37' W. In terms of the treaty, all land to the west of the line (which is now known to comprehend most of the South American soil), would belong to Spain, and all land to the east, to Portugal. As accurate measurements of longitude were impossible at that time, the line was not strictly enforced, resulting in a Portuguese expansion of Brazil across the meridian. Beginning in the 1530s, the people and natural resources of South America were repeatedly exploited by foreign conquistadors, first from Spain and later from Portugal. These competing colonial nations claimed the land and resources as their own and divided it into colonies. European diseases (smallpox, influenza, measles and typhus) to which the native populations had no resistance, and cruel systems of forced labor, such as the infamous haciendas and mining industry's mita, decimated the American population under Spanish control. After this, African slaves, who had developed immunities to these diseases, were quickly brought in to replace them. The Spaniards were committed to converting their American subjects to Christianity, and were quick to purge any native cultural practices that hindered this end. However, most initial attempts at this were only partially successful, as American groups simply blended Catholicism with their traditional beliefs. On the other hand, the Spaniards did not impose their language to the degree they did their religion, and the Catholic Church's evangelization in , and actually contributed to the expansion of these American languages, equipping them with writing systems. Eventually the Natives and the Spaniards interbred, forming a Mestizo class. These and the original Americans were often forced to pay unfair taxes to the Spanish government and were punished harshly for disobeying their laws. Many native artworks were considered pagan idols and destroyed by Spanish explorers. This included the many gold and silver sculptures found in the Americas, which were melted down before transport to Europe. Mestizo

Independence

The Spanish colonies won their independence in the first quarter of the 19th century, in the South American Wars of Independence. Simon Bolivar and José de San Martín led their independence struggle. In Brazil, a Portuguese colony, Dom Pedro I (also Pedro IV of Portugal), son of the Portuguese king Dom João VI, proclaimed the country's independence in 1822 and became Brazil's first Emperor. This was peacefully accepted by the crown in Portugal. Although Bolivar attempted to keep the Spanish-speaking parts of the continent politically unified, they rapidly became independent of one another as well, and several further wars were fought, such as the War of the Triple Alliance and the War of the Pacific. A few countries did not gain independence until the 20th century:
- Trinidad and Tobago, from the United Kingdom, in 1962
- Guyana, from the United Kingdom, in 1966.
- Suriname, from the Dutch control, in 1975 French Guiana remains part of France as of 2005, and hosts the European Union's principal spaceport, the Centre Spatial Guyanais.

Recent history

The continent, like many others, became a battlefield of the Cold War in the late 20th century. The government of Chile was overthrown in the early 1970s, as a late (and peculiar) development of the U.S. Monroe Doctrine. Throughout the 1980s and 1990s, Peru suffered from internal conflicts (see Túpac Amaru Revolutionary Movement and Shining Path). Other revolutions and military dictatorships have been common, but starting in the 1980s a wave of democratization came through the continent, and democratic rule is the norm now. Allegations of corruption remain common, and several nations have seen crises which have forced the resignation of their presidents, although normal civilian succession has continued. International indebtedness became a notable problem, as most recently illustrated by Argentina's default in the early 21st century.

Economy

As of 2002, South America's gross domestic product declined by 0.3 percent, and its unemployment rate was 10.8 percent. Due to histories of high inflation in nearly all South American countries, interest rates and thus investment remain high and low, respectively. Interest rates are usually double that of the United States. For example, interest rates are about 22 percent in Venezuela and 23 percent in Suriname. The exception is Chile, which had a head start from 1973 under Augusto Pinochet. The South American Community of Nations is a planned continent-wide free trade zone to unite two existing free-trade organizations—Mercosur and the Andean Community. In South America, the gap between the rich and the poor is tremendous. In Venezuela, Paraguay, Brazil, and many other South American countries, the richest 20 percent may own over 60 percent of the nation's wealth, while the poorest 20 percent may own less than 5 percent. This wide gap can be seen in many large South American cities where makeshift shacks and slums lie next to skyscrapers and upper-class luxury apartments.

Culture

Roman Catholicism is the dominant religion. French Guiana also has a large number of Protestants. Guyana and Suriname are exceptions, with three major religions: Christianity in general, Hinduism, and Islam. Portuguese and Spanish are the primary languages of the continent. The majority of South Americans (51%) speak Portuguese. However, most South American countries are Spanish-speaking, and nearly all of the continent's lusophones reside in Brazil. Among other languages used by many South Americans are:
- Aymará in Bolivia and Peru.
- Quechua in Bolivia, Ecuador, and Peru.
- Guaraní in Paraguay.
- English in Guyana.
- Hindi in Guyana and Suriname.
- Dutch and Indonesian in Suriname.
- Italian and German in certain pockets across southern South America. South American nations have a rich variety of music. Some of the most famous genres include samba from Brazil and cumbia from Colombia. Because of South America's ethnic mix, South American cuisine takes on African, American Indian, and European influences. Bahia, Brazil, is especially well-known for its West African-influenced cuisine.

People

Ethnic groups of South America include:
- Awá
- Banawa
- Caiapos
- Enxet
- European descendants, especially from Spain, Portugal and Italy.
- Ge
- Guarani
- Incas
- Quechuas
- Juris
- Latin peoples
- Mapuche
- Mestizo
- Xucuru
- Zaparos Indigenous peoples make up the majority of the population in Bolivia and Peru, and are a significant element in most other former Spanish colonies. Exceptions to this include Argentina and Uruguay. At least three of the Amerindian languages (Quechua in Peru and Bolivia, Aymara also in Bolivia, and Guarani in Paraguay) are recognized along with Spanish as national languages. Argentina is 10 percent Indian.

Mestizos

"Mestizo" is a term of Spanish origin used to designate the peoples of mixed European and Amerindian racial strain inhabiting the region spanning the Americas. Mestizos officially make up the majority of the populations of Chile (90%), Colombia (58%), Ecuador (65%), Paraguay (95%) and Venezuela (67%). Figures in other countries are Argentina (about 13%), Bolivia (30%), Brazil (about 12%), Uruguay (8%) and Peru (37%).

African ancestry

Africans first arrived with the Spanish and Portuguese in the 16th century. Most were brought as slaves and delivered to Brazil and the Caribbean. Brazil now has about 60 million black people. Venezuela and Colombia also have significant black population. "Mulato" is a term of Spanish origin (Mulatto in English) describing Latin Americans of mixed African and White racial descent. "Zambo" is a term of Spanish origin describing Latin Americans of mixed African and Amerindian racial descent. The feminine form is zamba.

Territories and divisions

Notes:
1 La Paz is the administrative capital of Bolivia; Sucre is the judicial seat.
2 Santiago is the administrative capital of Chile; Valparaíso is the site of legislative meetings.
3 Claimed by Argentina.
4 The South Georgia and the South Sandwich Islands have no permanent population, only hosting a periodic contingent of about 100 researchers and visitors.
- Depending on definitions, Panama and Trinidad and Tobago have territory in one or both of South and North America.

See also


- CONMEBOL
- Economy of South America
- Latin America
- Middle America
- History of the Americas
- South American Community of Nations

External links

News
- [http://www.notisur.com/ NOTISUR -- Political and social news of South America (in Spanish)] Sports
- [http://www.conmebol.com/ CONMEBOL -- Confederación Sudamericana de Fútbol (The South American Footbal Confederation) in Spanish and Portuguese] Geography
- [http://www.freeworldmaps.net/southamerica/index.html Physical map of South America] South American Community of Nations Category:Continents South America zh-min-nan:Lâm Bí-chiu ko:남아메리카 ja:南アメリカ simple:South America th:ทวีปอเมริกาใต้

Evergreen

:This article is about plant types. For other uses see Evergreen (disambiguation) Evergreen (disambiguation) In botany, an evergreen plant is a plant which retains its leaves year-round, with each leaf persisting for more than 12 months. This contrasts with deciduous plants, which completely lose all their foliage for part of the year, becoming bare and leafless. Leaf persistence in evergreen plants may vary from only just over a year (shedding the old leaves very soon after the new leaves appear), up to a maximum of about 40 years in Great Basin Bristlecone Pine (Pinus longaeva). However, very few species show leaf persistence of over 5 years. One additional special case exists in Welwitschia, an African gymnosperm plant which produces only two leaves, which grow continuously throughout the plant's life but gradually wear away at the apex, giving about 20–40 years' persistence of leaf tissue. gymnosperm In tropical regions, most rainforest plants are evergreen, replacing their leaves gradually throughout the year as the leaves age and fall, whereas species growing in seasonally arid climates may be either evergreen or deciduous. Most warm temperate climate plants are also evergreen. In cool temperate climates, fewer plants are evergreen, with a predominance of conifers, as few evergreen broadleaf plants can tolerate severe cold below about -25°C. Category:Botany

Spanish language

:This article is about the international language known as Spanish or Castilian. For other languages spoken in Spain see Languages of Spain. Spanish or Castilian (Spanish: español or castellano) is an Iberian Romance language, and the fourth most widely spoken language in the world according to some sources, while other sources list it as the second or third most spoken language. It is spoken as a first language by about 352 million people, or by 417 million including non-native speakers (according to 1999 estimates). Some assert that, after English, Spanish can now be considered the second most important language in the world (probably replacing even French), due to its increased usage in the United States, the high birth rate in most of the countries where it is official, the growing economies of the Spanish-speaking world, its enormous influence on the global music market, and simply due to the broad number of areas on the Earth's surface that the language is spoken in.

"Spanish" or "Castilian"

Spaniards tend to call this language español when contrasting it with languages of other states (for example: in a list with French and English), but call it castellano (Castilian, from the Castile region) when contrasting it with other languages of Spain (such as Galician, Basque, and Catalan). In some parts of Spain, mainly where the people speak Galician, Basque, and Catalan, it is considered offensive to call the language español, as that is what Francisco Franco called it during his reign. For the rest of the Spanish-speaking world, speakers of the language in some areas refer to it as español, and in others castellano is more common. Castellano is the name given to Spanish language in Argentina, Bolivia, Chile, Ecuador, Paraguay, Perú, Uruguay and Venezuela. Some philologists use Castilian only when speaking of the language spoken in Castile during the Middle Ages, stating that it is preferable to use Spanish for its modern form. Castilian can be also a subdialect of Spanish spoken in most parts of modern day Castile. It would have a series of characteristics and a specific pronunciation different to the one of Andalusia or Aragon for example, where they would speak different subdialects.

Classification and related languages

Spanish is a member of the Romance branch of Indo-European, descended largely from Latin and having much in common with its European geographical neighbors. Spanish is related to several languages in terms of phonology, grammar and orthography. Of these, Portuguese is perhaps one of the most similar in terms of major languages. However, Spanish is also closely related to Catalan, Asturian, Galician and several other Romance languages. Spanish has fewer similarities with French and Italian but shares strong ties due to Latin roots. Portuguese is orthographically similar in many ways to Spanish but it has a very distinctive phonology. A speaker of one of these languages may require some practice to effectively understand a speaker of the other (although generally it is easier for a Portuguese native speaker to understand Spanish than the other way around). Compare, for example: :Ela fecha sempre a janela antes de jantar. (Portuguese) :Ella cierra siempre la ventana antes de cenar. (Spanish) Some less common phrasings and word choices have closer cognates in Spanish because Portuguese has managed to retain a much larger vocabulary, with stronger Latin heritage: :Ela cerra sempre a janela antes de cear. (less common Portuguese) (Which translates as "She always closes the window before having dinner.") In some places, Spanish and Portuguese are spoken almost interchangeably. Portuguese speakers are generally able to read Spanish, and Spanish speakers are generally able to read Portuguese, even if they cannot understand the spoken language. In fact, the number of bilingual speakers in Brazil (where Portuguese is the official language) has greatly risen because nearly every nation bordering Brazil is Spanish speaking.

History

The Spanish language developed from vulgar Latin, with influence from Celtiberian, Basque and Arabic, in the north of the Iberian Peninsula (see Iberian Romance languages). Typical features of Spanish diachronical phonology include lenition (Latin vita, Spanish vida), palatalization (Latin annum, Spanish año) and diphthongation (stem-changing) of short e and o from Vulgar Latin (Latin terra, Spanish tierra; Latin novus, Spanish nuevo). Similar phenomena can be found in most other Romance languages as well. During the Reconquista, this northern dialect was carried south, and indeed is still a minority language in northern Morocco. The first Latin to Spanish dictionary (Gramática de la Lengua Castellana) was written in Salamanca, Spain, in 1492 by Elio Antonio de Nebrija. When Isabella of Castile was presented with the book, she asked, What do I want a work like this for, if I already know the language?, to which he replied, Ma'am, the language is the instrument of the Empire. From the 16th century on, the language was brought to the Americas, Federated States of Micronesia, Guam, Marianas, Palau and the Philippines by Spanish colonization. In the 20th century, Spanish was introduced in Equatorial Guinea and Western Sahara. For details on borrowed words and other external influences in Spanish, see Influences on the Spanish language.

Geographic distribution

Spanish is one of the official languages of the United Nations and the European Union. The majority of its speakers are confined to the Western Hemisphere, Europe and the Spanish territories in Africa (Canary Islands, Ceuta and Melilla). With approximately 106 million first-language and second-language speakers, Mexico boasts the largest population of Spanish-speakers in the world. The four next largest populations reside in Colombia (44 million), Spain (c. 44 million), Argentina (39 million) and the United States of America (U.S. residents age 5 and older who speak Spanish at home number 31 million) [http://factfinder.census.gov/servlet/DatasetMainPageServlet?_program=ACS&_lang=en&_ts=134303235020]. Spanish is the official and most important language in 20 countries: Argentina, Bolivia (co-official Quechua and Aymara), Chile, Colombia, Costa Rica, Cuba, Dominican Republic, Ecuador, El Salvador, Equatorial Guinea (co-official French), Guatemala, Honduras, Mexico, Nicaragua, Panama, Paraguay (co-official Guaraní), Peru (co-official Quechua and Aymara), Puerto Rico (co-official English), Spain (co-official Catalan/Valencian, Galician and Basque), Uruguay, Venezuela, and Western Sahara (co-official Arabic). In Belize, Spanish holds no official recognition, however, it is the native tongue of about 50% of the population, and is spoken as a second language by another 20%. It is arguably the most important and widely-spoken on a popular level, but English remains the sole official language. In the United States, Spanish is spoken by three-quarters of its 41.3 million Hispanic population. It is also being learned and spoken by a small, though slowly growing, proportion of its non-Hispanic population for its increasing use in business, commerce, and both domestic and international politics. Spanish does hold co-official status in the state of New Mexico, and in the unincorporated U.S. territory of Puerto Rico. See Spanish in the United States for further information. In Brazil, Spanish has obtained an important status as a second language among young students and many skilled professionals. In recent years, with Brazil decreasing its reliance on trade with the USA and Europe and increasing trade and ties with its Spanish-speaking neighbours (especially as a member of the Mercosur trading bloc), much stress has been placed on bilingualism and Spanish proficiency in the country. On July 07 2005, the National Congress of Brazil gave final approval to a bill that makes Spanish a second language in the country’s public and private primary schools [http://www.mercopress.com/Detalle.asp?NUM=5996]. The close genetic relationship between the two languages, along with the fact that Spanish is the dominant and official language of almost every country that borders Brazil, adds to the popularity. Standard Spanish and Ladino (Judæo-Spanish spoken by Sephardic Jews) may also be spoken natively by some Spanish-descended Brazilians, immigrant workers from neighbouring Spanish-speaking countries and Brazilian Sephardim respectively, who have maintained it as their home language. Additionally, in Brazil's border states that have authority over their educational systems, Spanish has been taught for years. In many other border towns and villages (especially along the Uruguayo-Brazilian border) a mixed language commonly known as Portuñol is also spoken. In European countries other than Spain and Andorra (where it holds no official status), it may be spoken by some of their Spanish-speaking immigrant communities, primarily in the Netherlands, Italy, France, Germany and the United Kingdom where there is a strong community in London. There has been a sharp increase in the popularity of Spanish in the UK over the last few years. It is spoken by much of the population of Gibraltar, though English remains the only official language. Yanito, an English-Spanish mixed language is also spoken. Among the countries and territories in Oceania, Spanish is the seventh most spoken language in Australia. It is also spoken by the approximately 3,000 inhabitants of Easter Island, a territorial possession of Chile. The island nations of Guam, Palau, Northern Marianas, Marshall Islands and Federated States of Micronesia all once had Spanish speakers, but Spanish has long since been forgotten, and now only exists as an influence on the local native languages. In Asia the Spanish language has long been in decline. Spanish ceased to be an official language of the Philippines in 1987, and it is now spoken by less than 0.01% of the population; 2,658 speakers (1990 Census). However, the sole existing Spanish-Asiatic creole language, Chabacano, is also spoken by an additional 0.4% of the Filipino population; 292,630 (1990 census). Most other Philippine languages contain generous quantities of Spanish loan words. Among other Asian countries, Spanish may also be spoken by pockets of ex-immigrant communities, such as Mexican-born ethnic Chinese deported to China or third and fourth generation ethnic Japanese Peruvians returning to their ancestral homeland of Japan. Spanish is also spoken by segments of the populations in Aruba, Canada, Curaçao, Israel (both standard Spanish and Ladino), northern Morocco (both standard Spanish and Ladino), Netherlands Antilles, Trinidad and Tobago, Turkey (Ladino), and the U.S. Virgin Islands. In Antarctica, the territorial claims and permanent bases made by Argentina, Chile, Peru and Spain also place Spanish as the official and working language of these enclaves.

Variations

There are important variations among the various regions of Spain and Spanish-speaking America. In Spain the North Castilian dialect pronunciation is commonly taken as the national standard (although the characteristic weak pronouns usage or laísmo of this dialect is deprecated). Spanish has three second-person singular pronouns: tú, usted, and in some parts of Latin America, vos (the use of this form is called voseo). Generally speaking, tú and vos are informal and used with friends (though in Spain vos is considered a highly exalted archaism that is now confined to liturgy). Usted is universally regarded as the formal form, and is used as a mark of respect, as when addressing one's elders or strangers. The pronoun vosotros is the plural form of tú in most of Spain, although in the Americas (and some particular southern-Spain cities such as Cádiz) it is replaced with ustedes. It is remarkable that the informal use of ustedes in southern Spain does not keep the proper pronoun-verb agreement: while the formal form of "you go" would be ustedes van, in Cádiz the informal form would be constructed as ustedes vais, making use of the second person of the plural instead of the third (which constitutes the formal construction). Vos is used extensively as the primary spoken form of the second-person singular pronoun in various countries around Latin America, including Argentina, Costa Rica, Ecuador, El Salvador, Guatemala, Honduras, Nicaragua, Paraguay and Uruguay. In Argentina, Uruguay, and increasingly in Paraguay, is it also the standard form used in the media, whereas media in other voseante countries continue to use usted or tú. Vos may also be present in other countries as a limited regionalism. Its use, depending on country and region, can be considered the accepted standard or reproached as sub-standard and considered as speech of the ignorant and uneducated. The interpersonal situations in which the employment of vos is acceptable may also differ considerably between regions. Spanish forms also differ regarding second-person plural pronouns. The Spanish dialects of Latin America have only one form of the second-person plural; ustedes (formal/familiar). Meanwhile, in Spain there are two; ustedes (formal) and vosotros (familiar/informal). The RAE (Real Academia Española), in association with twenty-one other national language academies, exercises a controlling influence through its publication of dictionaries and widely respected grammar guides and style guides. In part due to this influence, and also because of other socio-historical reasons, a neutral standardized form of the language (Standard Spanish) is widely acknowledged for use in literature, academic contexts and the media.

Grammar

Spanish is a relatively inflected language, with a two-gender system and about fifty conjugated forms per verb, but small noun declension and limited pronominal declension. (For a detailed overview of verbs, see Spanish verbs and Spanish irregular verbs.) As for syntax, the unmarked sentence word order is Subject Verb Object, though variations are common. Spanish is right-branching, using prepositions, and with adjectives generally coming after nouns. Spanish is also pro-drop (allows the deletion of pronouns when pragmatically unnecessary) and verb-framed.

Sounds

The consonantal system of Castilian Spanish, by the 16th century, underwent the following important changes that differentiated it from some nearby Romance languages, such as Portuguese and Catalan:
- The initial , that had evolved into a vacillating , was lost in most words (although this etymological h- has been preserved in spelling).
- The voiced labiodental fricative (that was written u or v) merged with the bilabial oclusive (written b). Orthographically, b and v do not correspond to different phonemes in contemporary Spanish, excepting some areas in Spain, particularly the ones influenced by Catalan/Valencian and some Andalusia.
- The voiced alveolar fricative (that was written s between vowels) merged with the voiceless (that was written s, or ss between vowels).
- The voiced alveolar affricate (that was written z) merged with the voiceless (that was written ç, ce, ci), and then evolved into the interdental , now written z, ce, ci. But in Andalucia, the Canary Islands and the Americas these sounds merged with as well. Notice that the ç or c with cedilla was in its origin a Spanish letter, although is no longer used.
- The voiced postalveolar fricative (that was written j, ge, gi) merged with the voiceless (that was written x, as in Quixote), and then evolved by the 17th century into the modern velar sound , now written j, ge, gi. The consonantal system of Medieval Spanish has been better preserved in Ladino, the language spoken by the descendants of the Sephardic Jews who were expelled from Spain in the 15th century.

Lexical stress

Spanish has a phonemic stress system — the place where stress will fall cannot be predicted by other features of the word, and two words can differ by just a change in stress. For example, the word camino (with penultimate stress) means "road" or "I walk" whereas caminó (with final stress) means "he/she/it walked". Also, since Spanish pronounces all syllables at a more or less constant tempo, it is said to be a syllable-timed language.

Writing system

The pronunciation of any Spanish word can be perfectly predicted from its written form. Spanish is written using the Latin alphabet, with the addition of ñ (eñe). Ch and ll also have their own places in the alphabet (a, b, c, ch, d, ..., l, ll, m, n, ñ, ...). Since 1990, however, words containing the letters ch and ll have been alphabetized as though spelled with the separate letters c - h and l - l. The letter u sometimes carries diaeresis (ü) after the letter g, and the stressed vowel carries an acute accent (á) in many words. Exclamatory and interrogative clauses begin with inverted question and exclamation marks.

Examples of Spanish

Note, the third column uses the International Phonetic Alphabet, the standard for linguists, to transcribe the sounds. There are several examples of travellers' vocabulary and one literary reference. You can listen to these words being read out. Both the transcription and the recording represent standard Castilian pronunciation. El Ingenioso Hidalgo Don Quixote de la Mancha, Miguel de Cervantes Saavedra (opening sentence).

See also


- Real Academia Española
- Common phrases in Spanish
- List of English words of Spanish origin
- Names given to the Spanish language
- Spanish proverbs
- Spanish language poets
- Spanish Creole
- Portuñol
- Papiamento, Chavacano language, Spanglish, Yanito, Palenquero
- Rock en español
- Latin Union
- Islenos

Local varieties


- Argentine Spanish
- Colombian Spanish
- Cuban Spanish
- Mexican Spanish
- Panamanian Spanish
- Puerto Rican Spanish
- Rioplatense Spanish
- Spanish in the United States
- Spanish in the Philippines
- Venezuelan Spanish
- Central American Spanish

External links

About the Spanish language


-
- [http://www.rae.es Official page of the RAE] (in Spanish)
- [http://www.ethnologue.com/show_language.asp?code=spa Ethnologue report for Spanish]
- [http://www.staff.ncl.ac.uk/i.e.mackenzie/index.html Spanish Language & Linguistics Website]
- [http://assets.cambridge.org/0521805872/sample/0521805872WS.pdf PDF: A history of the Spanish language]
- [http://www.sispain.org/english/language/worldwid.html Numbers of speakers by countries]
- [http://www.vistawide.com/spanish/why_spanish.htm Why learn Spanish?] 10 reasons for learning Spanish
- [http://spanish.about.com Spanish Language] Collection of lessons and other resources
- [http://www.geocities.com/Athens/Aegean/2444/splatin.html Spanish evolution from Latin]
- [http://www.trustedtranslations.com/spanish_language.asp Spanish Language Characteristics] Some characteristics of Spanish Language

Dictionaries


- [http://buscon.rae.es/diccionario/drae.htm DRAE, Dictionary of the RAE] (Spanish-spanish)
- [http://www.websters-online-dictionary.org/definition/Spanish-english/ Spanish — English Dictionary]: from Webster's Rosetta Edition.
- [http://www.diccionarios.com Diccionarios.com]
- [http://www.my-spanish-dictionary.com/ An English-Spanish Dictionary]
- [http://www.tododiccionarios.com/ Tododiccionarios.com] a directory of reference works in English or Spanish, classified by subject, with several thousand links.
- [http://spanishdict.com/ Spanishdict.com] Another Spanish-English dictionary.
- [http://wordreference.com/ Wordreference.com] Comprehensive Spanish-English-Spanish dictionary.
- [http://www.tomisimo.org/ Tomísimo.org] A Spanish-English dictionary.

Grammatical help


- [http://en.wikibooks.org/wiki/Spanish Spanish grammar Wikibook]
- [http://www.studyspanish.com/tutorial.htm Spanish Grammar Tutorial - with quizzes, tests, and oral activities]
- [http://tchaidze.com/spangram/tenses.html#correspondence Usage of Tenses]
- [http://users.ipfw.edu/jehle/courses/accents.htm Use of written accent marks in Spanish]
- [http://verbs.obrist.org Spanish Verb Forms] — Search and conjugate Spanish verbs.
- [http://www.helloworld.com.es/english/quick%20reference/grammar.htm Grammar and more] Examples, Uses, Explanations of Grammar Points and a Free Personal Spanish Verb Conjugator

Tutorials


- [http://www.declan-software.com/spanish Spanish vocabulary learning software with audio]
- [http://spanish.mypage.org Spanish for beginners and travelers]
- [http://learno.com/spanish/index.html Free Learno.com online Spanish tutorial]
- [http://www.listenandlearn.org Practice Spanish Online with Audio Stories]
- [http://www.studyspanish.com/ StudySpanish.com] Popular website for beginners
- [http://www.angelfire.com/ego/pdf/ng/argentina/arsp.html Rioplatense Spanish] Spanish from the River Plate basin
- [http://www.spanish-kit.net Spanish-kit.net] Free Downloadable Spanish grammars, and vocabulary learning tools.
- [http://www.fridaspanish.com Fridaspanish.com Learn Spanish] Mexican Spanish
- [http://www.ielanguages.com/spanish.html Free Spanish Language Tutorial at ielanguages.com]
- [http://www.quiz-tree.com/Spanish_Language_main.html Free Spanish quizzes with audio by a native speaker]
- [http://www.spanicity.com/ SpaniCity] Free Spanish lessons, sounds, grammar and dictionary
- [http://www.loecsen.com/travel/discover_pop.php?lang=en&to_lang=14&learn-Spanish/ Learn and listen to useful expressions in Spanish] Each expression is presented with an audio recording and an illustration
- Spanish phrasebook on Wikitravel

Resources


- [http://www.spanishblogger.com Spanish Blogs & Weblog Directory]
- Category:Languages of Spain Category:Languages of Argentina Category:Languages of Belize Category:Languages of Bolivia Category:Languages of Chile Category:Languages of Colombia Category:Languages of Costa Rica Category:Languages of Ecuador Category:Languages of El Salvador Category:Languages of Guatemala Category:Languages of Honduras Category:Languages of Mexico Category:Languages of Nicaragua Category:Languages of Panama Category:Languages of Paraguay Category:Languages of Peru Category:Languages of Uruguay Category:Languages of Venezuela ja:スペイン語 ko:에스파냐어 simple:Spanish language th:ภาษาสเปน

Raft

A raft is a special type of boat, distinguished by the absence of a hull. Rafts are kept afloat either by buoyant materials such as wood, or by inflated containers. This technology has been superseded by hulled boats in most parts of the world but inflatable rafts manufactured of flexible materials are used for recreational navigation of whitewater.

See also


- Rafting
- Lifeboat
- The Raft of the Medusa
- Project RAFT
- Thor Heyerdahl Category:Boat types Category:Sporting goods ja:ラフト

Timber

Timber is a term used to describe wood either standing or that has been processed for use —from the time trees are felled, to its end product as a material suitable for industrial use —such as structural material for construction or wood pulp for paper production. In the U.K. and Australia, "timber" is also the term for the sawed wood product (boards), whereas in the U.S., this is most often referred to as "lumber". The term TIMBER! is also used as a warning call to warn others working in the same area that a tree is going to fall down and that they should take care to get out of the way of its path. People may also use the term in this way to refer to other objects that fall, e.g., as a joke when someone is so drunk that he is about to fall.

See also:


- British timber trade
- Forestry
- Illegal Logging
- Logging
- Plank
- Timber, a 1941 Disney animated short.
- Timber Decking
- Timber treatment
- Woodworking

External Links:


- [http://www.trada.co.uk/ TRADA: Timber Research And Development Association]
- [http://www.fpl.fs.fed.us/ The Forest Products Laboratory. US main wood products research lab. Madison, WI (E)] Category: Forestry Category:Wood

Density

: For other senses of "density", see density (disambiguation). Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. The higher an object's density, the higher its mass per volume. The average density of an object equals its total mass divided by its total volume. A denser object (such as iron) will have less volume than an equal mass of some less dense substance (such as water). The SI unit of density is the kilogram per cubic metre (kg/m3) :\rho = \frac where :ρ is the object's density (measured in kilograms per cubic metre) :m is the object's total mass (measured in kilograms) :V is the object's total volume (measured in cubic metres) Under specified conditions of temperature and pressure, density of a fluid is defined as described above. However, the density of a solid material can be different, depending on exactly how it is defined. Take sand for example. If you gently fill a container with sand, and divide the mass of sand by the container volume you get a value termed loose bulk density. If you took this same container and tapped on it repeatedly, allowing the sand to settle and pack together, and then calculate the results, you get a value termed tapped or packed bulk density. Tapped bulk density is always greater than or equal to loose bulk density. In both types of bulk density, some of the volume is taken up by the spaces between the grains of sand. Also, in terms of candy making, density is affected by the melting and cooling processes. Loose granular sugar, like sand, contains a lot of air and is not tightly packed, but when it has melted and starts to boil, the sugar loses its granularity and entrained air and becomes a fluid. When you mold it to make a smaller, compacted shape, the syrup tightens up and loses more air. As it cools, it contracts and gains moisture, making the already heavy candy even more dense.

Other units

Density in terms of the SI base units is expressed in terms of kilograms per cubic metre (kg/m³). Other units fully within the SI include grams per cubic centimetre (g/cm³) and megagrams per cubic metre (Mg/m³). Since both the litre and the tonne or metric ton are also acceptable for use with the SI, a wide variety of units such as kilograms per litre (kg/L) are also used. Imperial units or U.S. customary units, the units of density include pounds per cubic foot (lb/ft³), pounds per cubic yard (lb/yd³), pounds per cubic inch (lb/in³), ounces per cubic inch (oz/in³), pounds per gallon (for U.S. or imperial gallons) (lb/gal), pounds per U.S. bushel (lb/bu), in some engineering calculations slugs per cubic foot, and other less common units. The maximum density of pure water at a pressure of one standard atmosphere is 9