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Terms in this set (39)
How much of the Earth's surface is covered by water?
List the oceans in order from largest to smallest
Pacific, Atlantic, Indian, Arctic
If a trench does not exist, the steep continental slope merges into a gradual incline known as...?
What can submersibles do and what information can they provide for scientists?
They can collect data about areas of the ocean that were previously unreachable by humans and can stay underwater for long periods of time
List the three main regions of the ocean floor
Continental margin, Ocean basin floor, and Mid-Ocean ridge
Describe the continental margin
The zone of transition between the continental crust and the ocean floor
Describe the ocean basin floor
The flat area of land between the continental margin and the mid ocean ridge
Describe mid-ocean ridge
An area where sea-floor spreading occurs, there are mountains, and it is long and narrow
What kinda of activity can you find the continental margin in the pacific ocean?
Volcanic activity, Earthquakes, and Plate interactions
Where does seafloor spreading occur?
At divergent boundaries or Mid-Ocean ridges
What is the salinity of seawater?
3.5% or 35 parts per thousand
How is ocean salinity expressed?
Parts per thousand
What is the most abundant salt in the sea?
Sodium Chloride//Table Salt//NaCI
What is the principal source of dissolved substances in the oceans? Second?
Chemical Weathering of Rocks, Earth's Interior
Where would you find the seawater with the highest salinity?
Areas with high levels of evaporation, Where sea ice forms
What ocean zone experiences a rapid change in temperature?
What is density?
Mass per unit volume
What factors affect the density of seawater?
Temperature and salinity
In what zone would you fine the majority of ocean water?
What property most determines water's vertical position in the ocean?
What is the temperature of water that moves toward the poles?
What Country's temperature is most affected by the Gulf Stream?
What causes ocean currents to be deflected?
How do density currents move?
What causes an increase in the density of water? Decrease?
Increase in Density- decrease in temperature and increase in salinity. Decrease in density- Increase in temperature and decrease in salinity
Describe what happens in the global conveyor belt model
Warm water is moved toward the poles. It cools, sinks, and then moves back toward the equator
What does SONAR stand for?
SOund Navigation And Ranging
What causes ocean currents on the surface of the ocean?
What are the differences in ocean surface height measured by?
Which current is associate with downslope movements of dense, sediment-rich water?
What is the total amount of solid material dissolved in water?
The ocean floor contains mountain ranges, trenches, and flat regions called...?
The gently sloping submerged surface extending the shoreline toward the deep ocean is called...?
The deepest part of the ocean...?
The rising of cold water from deeper layers to replace warmer surface water
Deep, steep-sided valleys that originate on the continental slope and may extend to the ocean basin floor are called...?
New ocean floor is formed at mid-ocean ridges as magma rises between diverging plates and cools. True or False
In addition to salinity, what factor affects the density of seawater?
Upwelling brings greater concentrations of dissolved nutrients to the ocean surface. True or False
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