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| Where the greatest concentration of marine life is found. |
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The results of the challenger expidition were |
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Discovered life in the deep sea Stimulus to have oceanography programs around world Rediscovered ocean life thought to be extinct Gathered floor samples in the ocean ALL THE ABOVE |
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| Hydrothermal deep sea units (black smockers) are associated w/: |
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| HMS Challenger sailed from Portsmoth, England in her epic voyage in the year: |
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| One of the greatest early oceanographers was an American who, as a head of US Navy Depot of charts and instruments, and organized a world-wide oceanographic data collecting system still in use today |
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| At the present time sea level is: |
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The continental shelves are: |
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| Early Oceans were quite different chemically from present oceans because they lacked.... |
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The mid-atlantic ridge is a zone of: |
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| At the present time juvenile water (new water) is being added to the oceans primarily from where: |
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| De-Gassing the earth's interior |
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| Oxygen in the ocean has been derived primarily from what? |
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| Most photosynthesis in the ocean is carried out by the plank-tonic plant called |
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| Ocean water to the atmosphere from the atmosphere to land and from land to the sea is called the _____ cycle |
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| The conversion of the homogenous proto-earth to the highly differentiated earth of today occured when? |
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| The first billion yrs of earths history |
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| The currently held scientific theory of the origin of the solar system is? |
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| Nebular (condensation) hypothesis |
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What is pangaea? When did it form and when did it break up? |
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| A super continent that formed in the late paleozoic and broke apart in the triassic time |
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| An origin of the earliest oceans was intimantly associated with? |
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| What percentage of earths surface constitutes the true ocean basins? |
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| As a product of the submarine canyon systems, turbidities are characterized by: |
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| Directly seaward of the continental shelf is a more steeply sloping region known as the |
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| Which of the following best describes the difference between the continental shelf, rise and slope |
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| They mainly differ in slope and depth |
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| following the sea leven trend of teh last 20,000 yrs, over the nxt 10,000 yrs sea level should _______ INstead human activity may be causing a ______ |
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| The original water supplied to the oceans came from |
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| Vaporization and condensation of earth rocks from asteroid impacts AND Icy comets striking earth |
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| Characteristics of deep sea treches include |
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| The massive transportation of shallow water sedimaents into deep oceanic enviornment is associated with |
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The 2 major chemical ions found in sea water that constitutes 86% of all sea salts are |
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| Trace elements are very important to the bio-geo-chemical systems in teh ocean. they usually have concentrations of |
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Traditionally the element in sea water that is used to calculate salinity is |
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| The element used as an index of human pollution in the ocean is |
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| The principle ion in sea water, constituting 55% of all sea salts is |
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| The mixing time of the ocean is |
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| Deep ocean trenches are associated with |
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| the mid-atlantic ridge is an example of a |
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| Radioactive isotope dating of marine sedimentary rocks from the surface of the earth idicate that saline bodies of water were present on the earths surface as early as |
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| The chemical alteration of reduced inorganice compounds to release energy for food production |
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| The outer portion of the earth that is rigid and breaks when stressed beyond the elastic limit is called the |
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| Which source of energy drives mantle convective flows and plate movements |
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| Earths internal, thermal energy |
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| Based upon radioactive dation of earths rocks and meteorites the present accepted age of earth is |
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| Average salinity in the open ocean in parts/thousand |
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| Most near earth orbiting asteroids appearing migrants from a belt of asteroids located between |
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The result of the challenger expidition |
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| The present day mars differ from earth in that mars is |
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| The space prove Galileo's gravity measurments of europa idicate |
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| An iron core, rocky mantle and ice chelled, water crust |
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| The oort cloud consists of |
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| The oort cloud is located |
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| On the outskirts of the solar system |
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| Growing evidence indicated that very large volumes of water were delivered to earth by |
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