Why Oil Act Different Kinds Of Roles - 1160 Words

Introduction Oil is widely used a kind of fuel in people’s daily lives, and a kind of unit of currencies. People build a building, they need oil to start the machines and cars that transport the industrial materials. Almost everything can be related to oil. Why oil act different kinds of roles in modern society? About Oil Oil is a kind of thick, dark brown liquid. There is a large amount of oil stored in parts of the upper crust. It is a mixture that consists of hydrocarbons of various molecular weights including alkanes , cycloalkanes , aromatic and other organic compounds. Two theories about how oil was produced have been widely spread, one is biogenic deposit, the other is petrochemical, though more scientists agree the biogenic one.†¦show more content†¦There are a lot of different between different regional oil, for example, the viscosity, the freezing point (30 to -60 degrees Celsius), boiling point (over 500 degrees Celsius). It can be dissolved in a variety of organic solvents , insoluble in water, but it can form an emulsion with water. Experienced workers can distinguish oil from different regions by the composition and appearance. Oil is regarded as the world s most important energy, even some people agree that oil is the blood stream of the world economy. In 2012, 88% of oil is used as fuel, the other 12% is used as raw material for the chemical industry. From the geographical knowledge, the world s oceans cover 360 million square kilometers, about 2.4 times compared with the land. Continental shelf and continental slope cover about 55 million square kilometers, equivalent to the total land area of sedimentary basins. It has proven that a quarter of oil resources on the Earth is buried in the seabed; therefore, it can be predicted that there will be more people working in the ocean for oil resources instead of land in the future. Oil’s Yesterday In the 5th century AD,oil fields dug by human hands appeared in the capital of Persian Empire (Susa) appe. Oil was also used in the Middle East war. In the famous book Iliad ,traditionally attributed to Homer, it described that the Troy who tried to light the