SP #3: Marine Provinces and Ocean Floor Features
Deep and narrow valleys where oceanic lithosphere sinks downward into the mantle are called ____
Deep Sea Trench
Continental shelves are underlain with oceanic crust and are not geologically part of continents
False
Hydrothermal vents are deep-sea hot springs where superheated water forces its way up through the crust
False
The continental rise lies on top of the continental slope
False
The deepest regions of the ocean are part of the relatively narrow seafloor features called submarine canyons
False
Flat topped, submerged seamounts are called ____
Guyot
Where is the seafloor deepest
B Deep Sea Trenches
Passive continental margins are characterized by all of the following EXCEPT:
B Deep-Sea Trenches
Why does extremely hot liquid water, and not steam, emit from Black smokers
B The high pressure at their ocean depths raises water's boiling point
Geologically, the edge of a continent is marked by
C Lowest Part of the Continental Slop
The abyssal plain is extremely flat because
C Thick Sediment Layers Cover the Irregularity of the Seafloor Beneath It
Active continental margins are characterized by
D All of the Above
The correct order of seafloor features from the coast to the mid-ocean ridge is:
D Shelf, Slope, Rise, and Abyssal Plain
The continental rise is often absent along Pacific margins because
D There are Many Deep-Sea Trenches
More tahn 80% of Earth's volcanic activity occurs on the seafloor at submerged mountain ranges called _____
Ridge
Submerged volcanic features on the seafloor that are less than 1000 meters tall are called _____
Sea Knoll
Submerged volcanic features on the ocean floor that are more than 1000 meters tall are called _____
Sea Mount
Deep and narrow valleys that cut across the continental slope and shelf are called ___
Submarine Canyon
Active continental margins are found mainly around the Pacific Ocean
True
Satellites can be used to map the seafloor because the shape of the ocean surface reflects large features on the seafloor below
True
The Pacific Ring of Fire is the seismically active area along the margins of the Pacific Ocean where earthquakes and volcanoes are common
True
The tallest mountains and deepest valleys on Earth are found on the ocean floor
True