...copper is essential to our health as an important constituent of skin, bones and blood. It is also biostatic - bacteria cannot grow on its surface. High-tech doctors save lives with the help of copper-cladscalpels.
...a copper plumbing system from the Pyramid of Cheops in Egypt is still in a serviceable condition after more than 5,000 years.
...copper has always been part of metal money.
...chefs around the world prefer copper cookware due to its properties of high heat transfer plus uniform heating (no hot spots).
...copper is the standard for electrical conductivity. It conducts electrical current better than any other metal except silver.
...IBM is replacing aluminium with copper in computer chips — up to 200 million transistors can be packed onto such a chip. The result is much faster operating speeds.
...about 2% (9,000 pounds) of the total weight of a Boeing 747-200 jet plane is copper. A typical diesel-electric locomotive uses about 11,000 pounds of copper while a Triton-class nuclear submarine uses about 200,000 pounds of copper.
...yellow brass (Copper Alloy 360) is so easy to machine, that it is the standard for metals machinability.
...high-strength, nonmagnetic and corrosion-resistant copper alloy tools are also nonsparking, which is valuable in situations where explosions are feared.
...designers look at copper and brass as metals of quality, comfort and beauty.
...through one hundred years of sea winds, rains and sun, the copper skin of the Statue of Liberty not only has become more beautiful but also has remained virtually undamaged. Closer analysis shows that weathering and oxidation of the copper skin has come to just 0.005 of an inch in a century.
...copper clearly was a good idea a hundred years ago. With technological advances, copper is still a great idea today.
IV. Explain why...
1) copper is important to our health.
2) copper is widely used in medicine.
3) the ancient Egyptian plumbing system is still in a serviceable condition.
4) copper cookware is preferred by cooks worldwide.
5) copper is the standard for electrical conductivity.
6) aluminium is being replaced with copper in computer chips.
7) transport means need copper.
8) copper alloy tools are used in situations where explosions are feared.
9) copper metals are popular as a decorative material.
10) the Statue of Liberty needed little restoration.
V. Comment on the following statement. Give reasons for your answer.
Copper metals are used for an infinite variety of applications that range from small mass-produced parts in free-machining brass to equipment for the 'space-age' industries of rocket production and atomic energy.
VI. Can you suggest another title for the text?
Activity
I. a) Divide intogroups and fill in the table using the information from the text and your background knowledge.
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