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The Aleutian Islands are associated with which type of plate boundary?
Convergent boundary
TRUE OR FALSE: Most tectonic plates include both continental and oceanic crusts.
True
If you were to go out away from the shore across a passive continental margin, you would cross the:
continental shelf, slope, then the rise
This unit of measurement for water depth, now standardized to be equal to 6' or 1.8 meters in length, is called a:
fathom
The sedimentary formations found at the bottom of many submarine canyons in the continental rise area and caused by turbidity currents, are (more than one answer, choose all that apply):
- deep-sea fans
- turbidites
Iceland is associated with which type of plate boundary?
Divergent boundary
All of the following are types of features at plate boundaries EXCEPT:
Bilateral
Turbidity currents are highly erosive and are thought to be responsible for the creation of:
submarine canyons
Match the bathymetry technique to its description: [sounding, echo-sounding, satellites, seismic profiling]
Low-tech, using a rope with a heavyweight at the end of it = sounding
Transmits and receives acoustic waves through the water = Echo-Sounding
Can detect gravitational anomalies on the ocean surface = Satellites
Uses low frequency sounds produced by air guns to detect what lies beneath the ocean floor = Seismic profiling
Low-tech, using rope with a heavy weight at the end of it = sounding
Transmits and receives acoustic waves through the water = Echo-Sounding
Can detect gravitational anomalies on the ocean surface = Satellites
Uses low frequency sounds produced by air guns to detect what lies beneath the ocean floor = Seismic profiling
Besides the abyssal plains, the majority of the deep ocean basins, which are also one of the most abundant geomorphic structures on the planet, consist of:
abyssal hills
The San Andreas Fault is associated with which type of plate boundary?
Transform boundary
The type of plate boundary that commonly has a rift valley associated with it is a:
divergent boundary
True or False?: Pillow lavas (pillow basalts) indicate that molten lava came in contact with water and cooled very quickly.
True
The three major provinces of the ocean floor include all of the following EXCEPT:
transform fault zones
White smokers, a type of hydrothermal vent, emits white "smoke", or water that is concentrated with mainly what materials?
calcium, silicon, and barium sulfide.
The Hawaiian Islands are associated with which type of plate boundary?
Not associated with any type of plate boundary
Choose from the following choices, the two youngest seas in the world, which are also linear seas:
Red Sea
The term used to describe ocean floor mapping or the measurement of ocean depths and the charting of ocean floor features, is called:
bathymetry
Generally, an active continental margin has a narrower continental shelf than a passive margin because:
it is nearer to a subduction zone
True or False? The tectonically active portions of the perpendicular offsets to the mid-ocean ridge are called transform fault zones, while the older, inactive offset zones are called fracture zones.
True
The Cascade Mountains are associated with which type of plate boundary?
Convergent boundary
Hotspots are commonly found in areas nowhere near a tectonic plate boundary, so how do they help us understand tectonic plate movements?
They create a series of volcanoes over time, in a pattern that shows the plate moving on top of it.
Ocean floor mapping is fundamental to our understanding of:
all of the choices are correct
Generally, an active continental margin has a narrower continental shelf than a passive margin because:
it is nearer to a subduction zone
All of the following statements are true about oceanic islands EXCEPT:
They are actually part of the continental shelves of nearby continents.