Flashcards in Ocean Water and Sea Basins Deck (38)
Oceans cover __ percent of the Earth's surface
The ____ of ocean water is still under scientific debate
The land on the globe is concentrated in the ______ hemisphere
The Southern Hemisphere is primarily...
oceans with very little land
which hemisphere contains all of our major continents?
Does the uneven distribution of land affect large scale ocean water circulation?
the uneven _____ of land affects large scale ocean water ______
What are the four main, main,interconnected ocean basins comprising the world ocean?
Pacific, Indian, Atlantic, and Southern
when all of the continents were joined in the supercontinent Pangea, ocean currents were..
As the continents split apart, ocean currents became more...
Where is the deepest part of the ocean? How deep is it?
- Marianas Trench
- 11km at its deepest. 4.5 km average
The overall topography of the ocean floor: there is a continental _____ that is part of the crust that _____ downward to the ocean _____.
shelves, slopes, floor
What is the ocean floor also called?
the abyssal plain
Oceanic crust, on average, is ______ then continental crust
How old is the oldest oceanic crust?
200 million years
Oceanic crust is younger because it is rapidly _____ through ______ at subduction zones and ______ at mid ocean ridges
renewed, destruction, formation
margins between continents can be either _____ or _____
margins between continents can be either active or passive depending on...
tectonic activity at the margin
margins between continents can be either active or passive depending on ______ activity at the margin.
Is there a lot of sediment deposited in the deep ocean floor?
why is there scarce sediment deposited in the deep ocean floor?
because it is too far away form any source of sediment (land)
what is one way that sediment reaches the ocean floor?
turbidity currents are like ______ under the water
Turbidity currents can be considered as avalanches that flow down the ______ slope
where do turbidity currents flow from?
the continental slope
why is the sediment layers in turbidity currents?
As the sediment flows it divides itself up into different sized particles
where do turbidity currents deposit their load?
At the base of the slopes
Is the sediment in turbidity currents more for less dense than the ocean water?
what is sediment-rich water that is denser then the rest of the ocean water and flows along the ocean floor to deposit?