The Ocean

The Ocean


The world's ocean covers about 70% of the Earth's surface. It is use to produce

us many things. It is more than a place to swimming, sailing and other

recreation. The ocean serves as a source of energy, raw materials and most of

all food like fish and seaweed. In this essay I will talk about "What are our

ocean resources and the importance of the oceans in the future."


First, our largest resource in the ocean is food. There are two different kinds

of food in the ocean, such as marine plants and marine animals. These two kinds

of resources are reborn resources and it will never be end. For marine plants we

have the algae's family, like seaweed. During ebb tide, you can find the seaweed

between rocks. For the marine animals we have fish and shrimp. The fish and

shrimp are always moving around the ocean and follow the ocean currents.


What is ocean current? It is a movement of ocean thatcan buring the fish to

other places. There are two kinds of circulation create the currents in the

ocean. They are (1) wind-driven circulation and (2) Thermohaline circulation.

Wind-driven circulation result from the wind sets the surface waters into motion

as currents. The currents generally flow horizontally-that is parallel to the

earthˇ¦s surface. The wind mainly affects only the upper 100 to 200 meters of

water. However, the flow of wind-driven currents may extend to depths of 1,000

meters or more.


Thermohaline circulation produces great vertical currents' hat flow from the

surface to the ocean bottom and back. The currents largely result from

differences in water temperature and salinity. The currents move sluggishly from

the polar regions, along the sea floor, and back to the surface. In the polar

regions, The surface waters become colder and saltier. Being colder and saltier

makes these waters heavier, and they gradually flow back toward the surface and

replace the surface waters that sink. For example, as a warm ocean current and a

cold ocean current meet together, The warm water will always follow cold water

and moving around the ocean. The most important is the plankton does not like to

stay in the cold place. They will follow the warm current. As the result the

small fish like shrimp that eats plankton, will follow the plankton. Similarly

the bigger fish that eats small fish and shrimp will just follow also and these

fishes became a chain.


Our ocean has produced raw material also. Like natural gas and petroleum. These

materials are all unaltered. After you have take them out, you need to use

machine to take out the dirt. For example the petroleum is use to sucked out by

the big pipes. The asphalt road and the clean oil can be the fuel. South china

sea has a big processing plant that produces the oil and natural gas. In late

1980ˇ¦s, offshore wells produced about 25 percent of the worldˇ¦s oil and about

20 per cent of the worldˇ¦s gas. Scientists estimate that 3 trillion barrels of

oil lie undiscovered beneath the ocean. Equally huge amounts of untapped gas

accompany the oil. As gas and oil reserves on land are use up or become too

difficult and expensive to obtain, finding and recovering undersea deposits will

become increasingly important.


The ocean can be use to produce power. First, we have wave power. Generator was

built in the ocean. It has a pumping chamber. It will move up and down to turn

the generator. Second, we have tidal power. The generator will have toThis is ONLY a preview of the article. If you would like to view the entire document, you must subscribe to Electronic References. Please register below now!


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