oceanography ch 3
the average slope of the continental shelf is approximately
A tenth of a degree
what percent of earth's volcanic activity, each year, takes place on the seafloor
85%
active continental margins are characterized by which of the following
deep sea trenches
older lithosphere is destroyed in association with
deep sea trenches
tamu massif, the largest single volcano on earth occurs in which of the following oceans
pacific ocean
the first recorded attempt to measure the ocean's depth was conducted using which of the following techniques
sounding
along the margins of the pacific are found most of earth's
oceanic trenches
of the following items, which are associated with a passive continental margin
a wide continental shelf a continental rise
extending from the base of the continental rises into the deep ocean basins are flat depositional surfaces called
abyssal plains
the measurement of ocean depth and the charting of seafloor topography is called
bathymetry
characteristics of passive continental margins include which of the following
broad continental shelves
satellites use microwave beams to measure sea level to an accuracy of four
centimeters
passive margins are usually produced over geologic time by which of the following
continental rifting and continued sea floor spreading
where does the deep ocean basin begin along a passive continental margin
continental slope
which of the following features is related to transform faults along the mid-ocean ridges
fracture zone
the direction of motion along a seafloor transform fault is
in the same direction as the plates are spreading
the island of java is an example of volcanic island associated with volcanic activity at a
island arc
which of the following techniques used to determine ocean bathymetry is illustrated in the image
multibeam sonar
new lithosphere is produced in association with
oceanic ridges
with respect to mid ocean ridges, transform faults are
perpendicular to the ridge axis
most large ocean floor features owe their origins to
plate tectonic processes
the correct order of seafloor features from the coast to the mid-ocean ridge is
shelf, slope, rie, abyssal plain
the method that is used most frequently to investigate sediment and rock layers of the sea floor is
sound waves
satellites are used to map the ocean floor because
the shape of the ocean surface reflects large features on the seafloor
all true oceanic islands are ____ in origin
volcanic
seamounts and abyssal hills are _____ in origin
volcanic
warm water hydrothermal vents form
white smokers