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plants lived near the poles, but landmasses have drifted to current locations

Fossils of ancient polar plants are currently found near the equator because the:

continental slope

Directly seaward of the continental shelf is a more steeply sloping region called the..

differing densities of the rock and mineral materials

The separation of the earth into layers was the result of the

parallel to and symmetric about oceanic ridges

The seafloor magnetic pattern is best described as

best explains all available observations

Based on the scientific method, science supports the explanation of the natural world that

increases in proportion to the distance

Moving from oceanic ridge to oceanic trench, the thickness of the lithosphere:

none of the above

Submarine canyons were most likely formed by


sediments derived from pre-exisiting rocks are called

all bodies in the solar system formed from an enormous gas cloud

The nebular hypothesis suggests that

Mid-ocean ridge

New lithosphere is produced in association with

all of the above
(proximity to continents, productivity of microscopic marine organisms, depth of ocean)

The distribution of neritic and pelagic sediments is influenced by many factors including

Pacific Ocean

Which ocean is the deepest on earth?

Divergent Boundary

The mid-Atlantic ridge is an example of a

Deep-sea trenches

Old lithosphere is destroyed in association with

Diatom ooze

all of the following are lithogenous sediments except

The lithosphere is composed of the crust and the topmost portion of the mantle

Which of the following statements is true of the lithosphere

Volcanic Island arcs

Which of the following is characteristic of oceanic-oceanic plate boundaries?

White and black smokers

Hot vent hydrothermal vent form


Sediments produced as a result of evaporation of seawater are called

ALL of the above,
Have changed in the past
continue to change today
Will look very different in the future

the portions of various sea floor and continental features


the early oceans and atmosphere are thought to have come from inside earth, and were formed by a process called outgassing, true or false?


The oldest oceanic rocks are located at mid-ocean ridge, true or false?


continental-continental convergence is associated with uplifted mountain ranges and deep earthquakes, true or false?


the hypsographic curve is a graphic representation of the uneven distribution of areas at different land elevations and ocean depths true or false?


the deposition of radiolarian oozes is affected by the carbonate compensation depth, true or false?


passive margins are continental margins that are associated with lithospheric plate boundaries marked by a high degree of tectonic activity, true or false?


Submarine canyons are continental slope and to a lesser extent on the continental shelf are cuts in the slope by turbidity currents, true or false?


calcareous shells will generally not accumulate on the ocean sea floor when the water depth exceeds calcite compensation depth


the mantle plumes and their associated hot spots record the motion of plates past them


a well-sorted sand deposit with rounded particles might be called immature


the major force brining continental sediments to the open ocean are

many deep sea fans

continental rises are formed by

large particles such as gravel

high-energy enviornments are more likely to contain which of the following?

continental shelf

the most gradual change in slope in the ocean can be found at the


free oxygen was present in the earth's first atmosphere as a result of photosynthesis, true or false?

parallel to the rift valley

with respect to mid ocean ridges, transform faults are


sediments found on continental margins are called


fast moving spreading ridges tend to be more gently sloped than slow moving ridges

lots of carbon dioxide and cold temperatures

calcium carbonate is most likely to dissolve in water with which characteristics

absolute age of the rock

radioactive isotopes can sometimes be used to determine the

contours at around 2000 meters at depth

all continents fit together with the least number of overlaps and gaps when the continents are matched along


which of the following contains silica?

continental crust is thicker and less dense than oceanic crust

Which of the following statements regarding continental and oceanic crust is true?

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