Topic : "Lead"

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Facts

Studies of the Deinonychus helped lead to the widely accepted theory that birds descended from dinosaurs.

studies , helped , lead
Facts

Colombia is the world's leading source of emeralds and its coffee is world-renown.

colombia , leading , source
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Japan is a world leader in robotics. Japanese engineers are known for producing a range of human-like robots such as ASIMO.

japan , world , leader
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The US was the leading force behind the development of the Internet.

us , leading , force
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If inhaled or swallowed, lead is very poisonous. Lead poisoning can have a major effect on the body's nervous system. It can damage the body's organs and can cause weakness in the body's joints.

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Lead is still widely used to make statues and sculptures. It is used to make bullets and shot ammo and is also used in radiation shields around X-ray equipment.

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Lead is also used in the construction industry for roofing, cladding, gutters and glazing bars for stained glass. Its high density and resistance to corrosion makes it useful as the ballast keel of sailboats and as scuba diving weight belts.

lead , also , used
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Today, over half of the lead produced is used as electrodes in lead-acid car batteries.

over , half , lead
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Metallic lead is rarely found in nature as a free metal. It is usually found in ore with other metals such as copper, zinc and silver.

metallic , lead , rarely
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The melting point of lead is 621.4 °F (327.46 °C) and the boiling point is 3,180.2 °F (1,749 °C).

melting , point , lead
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Historically, tin and lead were hard to distinguish between. The Romans called lead 'plumbum nigrum' (black lead) and tin was called 'plumbum candidum' (bright lead).

tin , lead , were
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Lead has been used since ancient times due to the fact it is easily extracted from ore and generally easy to work with.

lead , been , used
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Lead is a soft, malleable, ductile (drawn out into a thin wire) and heavy metal. It initially has a bluish-white color that tarnishes to a dull gray color when exposed to air. It is corrosion resistant and when melted into a liquid has a shiny chrome-silver look.

lead , out , thin
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Lead is a chemical element with the symbol Pb and atomic number 82.

lead , chemical , element
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In 2007, heart disease was the leading cause of death in the USA.

heart , disease , leading