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Shown In Figure Surface Of The Earth
1,655 wordsThe oceans are said to be the source of life. The enormous, blue, calm oceans are the signatures of the planet earth. They cover nearly three-fourths of the surface of the earth. This is equal to 71 percent of the earths entire surface or about 361 million sq km (140 million sq mi). Its average depth is 5000 m (16, 000 ft), and its total volume is about 1, 347, 000, 000 cu km (322, 300, 000 cu mi). This includes the Atlantic, Pacific, and Indian oceans. These oceans are bordered by the continent...
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Organic Molecules Organic Matter
633 wordsDissolved oxygen infers to the volume of oxygen that is contained in water. Oxygen enters water through photosynthesis and across the water interface. The amount of oxygen that can be held by the water depends on the water pressure, salinity, and temperature. Gas solubility increases with decreasing temperature; thus colder water holds more oxygen. A reason why freshwater holds more oxygen than does saltwater is because gas solubility increases with decreasing salinity. When there is a change in...
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Uv Radiation Food Source
618 wordsTigriopus californians is an amazing little marine crustacean that is classified as a Harpactacoid copepod. Harpactacoid meaning its class, and copepod meaning its order. Because of its size and abundance, T. californians is commonly regarded as the insect of the sea. This creature is generally very small, from 1 - 3 mm in size as adults. They are cylindrically shaped, and have a segmented body (head, thorax, abdomen) though no noticeable division between body regions (Powlik 1966). Each segment...
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The End Permian Mass Extinction
3,001 words... verify the Chinese reports of iridium and they are fruitless. Anomalies can cause a build up of iridium in one place which would lead to what the Chinese have discovered (Erwin, 1993). Cosmic Radiation Global Cooling Global Warming Salinity The hypothesis that salinity decrease caused the mass extinction of oceanic life was first formed by Beurlen in 1956 (Maxwell, 1989). Evidence for this phenomena was based mainly on stenohaline groups such as the bryozoans, ostracods and corals which were...
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Permeable Membrane Semi Permeable
1,935 wordsI chose to experiment with the effects of salinity changes on the polychaete, Nereis succinct. Along with the other members of the group, Patty and Jeremy, I was curious to see whether the worms would engage in adaptive behavior when placed in a tank of water of foreign salinity, or whether they would simply continue changing osmotically until they reached equilibrium with the environment. The first step in our experiment was to simply observe the worms and get a "feel" for the ways in which the...
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Upper Saddle River Prentice Hall
888 wordsThe Earth is often referred to as the blue planet since it is seventy-one percent oceans and marginal seas with only twenty-nine percent comprising the continents and islands. There are three principal topographic features of the planets ocean floor: continental margin, ocean basin floor and mid-ocean ridge. The continental margin is the most extensive feature of the ocean floor divided into two kinds: a. ) the active continental margins which are primarily located around the Pacific Ocean with ...
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Desalination Plants Sea Water
1,236 wordsPurification of Sea Water In the late 20 th century, more than 8, 000, 000 cubic m (2, 112, 000, 000 gallons) of fresh water were produced each day by several thousand desalination plants throughout the world. Distillation processes are used in about half of all the plants and account for roughly three-quarters of the worlds desalted water. Most of the other plants employ membrane processes. The worlds desalination capacity expanded rapidly during the 1970 s and 80 s as the oil-rich countries of...
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Earth Surface Seismic Waves
2,491 wordsNotes on the lithosphere- (rock sphere) Upper most part is crust of earth. Compiled of rocks of outer crust. Outermost shell. Upper part- rocks we see at and near the earths surface. Crust is 5 to 10 km thick under most oceans and 24 to 60 km thick under the continents. The lithosphere under the crust is solid, dense material. (more dense than surface materials). Lithosphere 100 - 200 km. Notes on the asthenosphere- zone beneath the lithosphere. Thick like tar. Weak because of high temperatures ...
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Permian Extinction Mass Extinction
6,021 wordsThe End Permian Mass Extinction Introduction Think of a world which existed 290 million years ago. As you look out over the trade in front of you, you think that you are on an alien planet. You see volcanoes spewing ash and lava. Beside them is the ocean which is swarming with many different species of echinoderms, bryozoans and brachiopods. As you look down onto the sea floor you are amazed at the countless number of starfish and urchins. Some animals leave you can t even describe and you have ...
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