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