Iron


in its pure state is soft, malleable and ductile (that can be
stretched, drawn or hammered thin without breaking ((Webster's Dictionary, 419,
1988)) with a hardness of 4-5. It is easily magnetized at room temperatures and
this property disappears when heated above 790 degrees Celsius.. Metal
occurs in a free state in only a few localities, notably Greenland (Encarta,
1996). One of the physical properties of iron as an ore is its color which can
be black, brown or even reddish. Hematite is the most important iron ore,
commonly occurs as "kidney ore" - so -called because of its shape (Symes, 1988,
56). Other ores included goethite, magnetite, siderite, and bog iron (Encarta,
1996). ...

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is formed in shallow seas. It comes out of the water and collects
on the sea floor. This creates an underwater deposit. This process occurs over
billions of years. Through plate movement the whole sea floor is eventually
moved up out of the water. Once out of the water, the iron has formed a land
deposit. The biggest iron deposit in the United States is in the Great Lakes.
Northern Minnesota is often called the Iron Range. There are two ways iron
deposits are located. In the first method special machines that detects the
iron's magnetism are used ti find a deposit. In the second method a plane with
special equipment flies over an area of land suspected of having ore deposits
and shoots down sound waves to determine if that area contains iron deposit.
The waves come back up to the plane and determined by the pattern one can tell
if there is an iron deposit.
In the early 1990's annual production of iron ore in the United State
exceeded 56 million metric tons ...

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"Iron." Essayworld.com. November 12, 2008. Accessed June 6, 2020. http://www.essayworld.com/essays/Iron/92925.
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PAPER DETAILS
Added: 11/12/2008 02:34:24 AM
Category: Science & Nature
Type: Premium Paper
Words: 1056
Pages: 4

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