AskEssays.com - Discover essay samples

Copper

4.9 of 5.0 (1 reviews)

Contains
313 words
Category
Science & Nature

Copper Page 1
Copper Page 2
The above thumbnails are of reduced quality. To view the work in full quality, click download.

Period 3 Grade 8
is a mineral. it is not a plant or a animal.
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 reduced a fair
amount of these hazards. Miners wear hats made of iron or very hard plastic.
This is to protect them from falling rocks. Lamps are also attached to these
helmets in case some of the lighting in the mine goes out leaving a miner
stranded in the dark. One of the biggest problems with mining is that in some
places dangerous gas's may exist, like Carbon Monoxide. In the past we had very
cruel ...

You are currently seeing 50% of this paper.

You're seeing 313 words of 626.

Keywords: copper lietuviskai, copper price, copperfield, copper hair, copper iud, copper color, copperhead, copper minecraft

Similar essays


Fire 2

Fire is a topic on which most people can comment. Fire is a widespread phenomenon. Most of us have seen fires in natural vegetation, or their effects; stark, blackened vegetation or a smoke pall. Because fires such as these can have damaging economic and social effects, can spoil forestry timber, can burn down houses and farms, and can kill peop...

36 reviews
Download
Down Syndrome 3

Down Syndrome is a chromosomal disorder. It occurs in about 1 of every 800 births. People with Down syndrome may have mild to severe learning disabilities. Physical symptoms include a small skull, extra folds of skin under the eyes, and a protruding tongue. People with Down syndrome are subject to a variety of medical problems including heart abnor...

147 reviews
Download
Purple Loosestrife

The scene is breathtakingly beautiful, a thick brush of purple flowers blankets Canada's wetlands. This blanket silences the expected sounds of the wetland environment, birds chirping, ducks splashing, insects buzzing and animals thriving. This unnatural silence is disturbing, the favourite flowers that used to litter this landscape are no longer...

61 reviews
Download
Aromatherapy

according to by Anna Selby is derived from the ancient practice of using natural plant essences to promote health and well-being. It consists of the use of pure essential oils obtained from a wide assortment of plants, which have been steam distilled or cold-pressed from flowers, fruit, bark and roots. is also the therapeutic use of aromatic su...

184 reviews
Download
Cell Theory

; Hooke's Research Cell theory all began when a smart man named Robert Hooke discovered them in 1665. He discovered them by examining through a microscope very thin slices of cork and saw multitude of tiny pores. However, Hooke did not know their real structure or function of the cells. After many years of researching cells, scientist concluded w...

34 reviews
Download
Computers

DEVELOPMENT OF OVER THE DECADES A Computer is an electronic device that can receive a set of instructions, or program, and then carry out this program by performing calculations on numerical data or by compiling and correlating other forms of information. Thesis Statement:- The modern world of high technology could not have come about except for t...

37 reviews
Download
Earthquakes

An earthquake is shaking or trembling of the earth that is volcanic or tectonic in origin. "A broadly satisfying explanation of the majority of can be given in terms of what is called plate tectonics. The basic idea is that the Earth's outermost part also called the lithosphere consists of several large and fairly stable slabs of solid and relati...

1 reviews
Download
Egyptian Bedouins

The Life of the The Bedouin people of Egypt can easily be described as a people with no place to call a home. Studying the Bedouins show that they have a deep and unique culture. They do not get involved in politics, and they live a humble and modest life. The Bedouin Nomads of Egypt are predominantly Muslim. Therefore, their beliefs, practice...

212 reviews
Download
Current Status Of Malaria Vaccinology

In order to assess the one must first take an overview of the whole of the whole disease. One must understand the disease and its enormity on a global basis. Malaria is a protozoan disease of which over 150 million cases are reported per annum. In tropical Africa alone more than 1 million children under the age of fourteen die each year from Malar...

202 reviews
Download
Born Too Early

According to the American Association of Premature Infants (AAPI), over 400,000 babies are born prematurely or at a low birth weight. As a result of being born early they are more likely to require high-technology intensive and specialized care in the hospital and follow-up care as infants and children. As a result, many have chronic medical proble...

37 reviews
Download
Avalanches

The good effects of an avalanche An avalanche clears an area of trees and other obstacles. In the warmer months, land that experienced an avalanche in the previous winter will be clear, which creates a path up the mountain that offers easier traveling for both humans and animals. This helps animals cover ground more easily while hunting and offers...

120 reviews
Download
Irrigating Crops With Seawater

Brown J. Jed, Glenn Edward P., and O?Leary James W. 1998. Irrigating Crops with Seawater. Scientific American. ?? talks about the global problem of finding enough water and land for the world?s population to survive. An estimated 494.2 million acres of cropland is needed just to feed the tropics and subtropics for the next 30 years. H...

107 reviews
Download
Nucleic Acids

DNA is the single most important molecule found within cells. It is a stable polynucleotide, which contains coded information for inherited characteristics. It is contained in chromosomes in the nucleus of an eukaryot cell. The essential features of the Watson-Crick model are summarised below. 1. The two helical polynucleotide chains are coiled aro...

189 reviews
Download
David Suzuki's A Planet For The Taking

In the essay "A Planet for the Taking," David Suzuki describes Canadians' odd appreciation for this great natural bounty we call our own. He is an internationally acclaimed scientist who is concerned about the welfare of Canada. Suzuki's intended audience is the Canadian population that does not realize the grave danger they are instilling upon t...

103 reviews
Download
Atsisiųsti šį darbą