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Rust  is an  iron  oxide, usually red oxide formed by the redox reaction of  iron  and oxygen in the presence of water or air moisture. Several forms of  rust  are distinguishable both visually and by spectroscopy, and form under different circumstances.  Rust  consists of hydrated  iron (III) oxides Rusting , a well known example of  corrosion , is the breakdown of the metal iron. The reactants of this chemical reaction are iron, water, and oxygen, and the product is hydrated iron oxide, better known as  rust . Rust  is another name for iron oxide, which occurs when iron or an alloy that contains iron, like steel, is exposed to oxygen and moisture for a long period of time. Over time, the oxygen combines with the metal at an atomic level, forming a new compound called an oxide and weakening the bonds of the metal itself Let's return to the chemical reaction in which iron (Fe) combines with oxygen (O 2 ) to form...

snail climbing on a rusted steel bar which is connected to a piece of a wood in nawalapitiya imboolpitiya estate tea leaves collecting center in sri lanka, most of the tea plantations are being closed due to less maintenance by the private sectors of sri lankan tea industries. this photograph also explains you the effect of poor management by the private companies who are running the tea and rubber plantations currently. The employees are not paid well to over come the monthly expenses and the  management by the private companies who are running the tea and rubber plantations currently are not giving the rights do be free from the issues.

PHYLUM MOLLUSCA The molluscs include a number of familiar animals, including snails, oysters, clams, octopuses and squids. Many species have a calcareous shell. Molluscs are bilaterally symmetrical, although some have secondarily lost the symmetry in part; they have well-developed excretory, digestive, respiratory and circulatory systems. In all molluscs except the cephalopods, the circulatory system is open. All molluscs are characterized by having three main body regions: a  head-foot , which is the sensory and locomotor part of the body; a  visceral mass , containing most of the organ systems; and a  mantle , which covers the visceral mass and secretes the shell, if one is present. Most molluscs also have  radula , a rasping structure covered with chitinous teeth, which is used in feeding. Molluscs are probably closest phylogenetically to the annelids. Several lines of evidence support this view. Both annelids and molluscs have very similar developmental patte...

The   black-headed ibis   or   Oriental white ibis   ( Threskiornis melanocephalus ) is a species of wading bird of the   ibis   family Threskiornithidae which breeds in the   Indian Subcontinent   and   Southeast Asia   from northern India,   Bangladesh ,   Nepal   and   Sri Lanka   east up to Japan. It builds a stick nest in a tree and lays 2–4   eggs. It occurs in marshy wetlands inland and on the coast, where it feeds on various   frogs and fish   and other water creatures, as well as on insects. It walks about actively on marshy land probing with its bill into soft mud and often feeds in shallow water with its head momentarily submerged. Like storks and Spoonbills, it lacks a true voice-producing mechanism and is silent except for peculiar ventriloquial grunts uttered when nesting. Adults are typically 75 cm long and white plumaged with some greyer areas on the wings. The bald h...

History of Ceylon Tea Strange as it may seem, the story of Ceylon Tea begins with coffee. The tale begins in the early 1820s, barely five years after the surrender of Kandy, the last surviving indigenously-ruled state in Ceylon, to the British crown.  By then, the rest of the island had already been a British colony for more than a generation. Its possession was considered vital to imperial interests in India and the Far East, but the cost of maintaining the military presence and infrastructure necessary to secure it was prohibitive. Attempts to raise revenue by taxation could not by themselves fill the gap; how to make the colony pay for itself and its garrison was a problem that had troubled successive governors since the first, Frederic North, took office in 1798. Experiments with coffee may already have begun by 1824, when the fifth of Ceylon’s colonial governors, Edward Barnes, arrived in the island, but it was he who first saw in coffee a solution to the colony’s per...

The bamboos /bæmˈbuː/ are a subfamily of flowering perennial evergreen plants in the grass family Poaceae. Giant bamboos are the largest members of the grass family Scientific name :  Bambusoideae Higher classification :  Grasses Rank :  Subfamily Order :  Poales Bamboos are a group of woody perennial evergreen plants in the true grass family Poaceae. Some of its members are giants, forming by far the largest members of the grass family. There are 91 genera and about 1,000 species of  bamboo . They are found in diverse climates, from cold mountains to hot tropical regions. The woody ringed stems, known as culms, are typically hollow between the rings (nodes) and grow in branching clusters from a thick rhizome (underground stem).  Bamboo  culms can attain heights ranging from 10 to 15 cm (about 4 to 6 inches) in the smallest species to more than 40 metres (about 130 feet) in the largest.