Tuesday, August 20, 2019
Copper Essay -- essays research papers
Copper           Copper is a mineral. it is not a plant or a animal. Copper is a metallic metal. It can never be broken down into differnet substances by normal chemical means. Copper was one of the first metals known to humans. People liked it because in it’s native condition, it could easily be beaten into weapons or tools. Copper has been one of the most useful metals for over 5000 years. Copper was probably used around 8000 B.C by people living along the Tigris and Euphrates rivers. In 6000 B.C, Egyptians learned how to hammer copper into things they wanted. Around 3500 B.C, People first learned how to melt copper with tin to make bronze. So the period between 3000 B.C and 1100 B.C became known as the bronze age.                Today, some of the leading states of the copper industry are Arizona with 747,000 short tons, Utah with 187,000 short tons, New Mexico with 161,000 short tons. Some other leading countries are Chile with 1,422,000 short tons, United States with 1,203,000 short tons, Soviet Union with 650,000 short tons, and Zambia with 596,000 short tons.           When copper is being mined, both Native copper and copper ore are usually found. The highest grade of copper ore is pale silvery gray. Miners used to be always in danger in copper mines. Today, we have redu...
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