OCNG

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

Volcanic arc

Volcanic features on the ocean floor that are less than 1,000 meters (0.6 miles) tall are called

abyssal hills

Extending from the base of the continental rises into the deep-ocean basins are flat depositional surfaces called

abyssal plains

solar nebular hypothesis suggests

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

What technology solved the problem of locating longitude at sea?

an accurate sea watch

Older lithosphere is destroyed in association with

deep ocean trenches

The Mid-Atlantic Ridge is an example of a

divergent plate boundary

All of the following are considered part of the continental margin except the:

fracture zone

Lithosphere

is composed of the crust and the uppermost portion of the mantle

Which of the following is a source of dissolved salts in seawater?

minerals dissolved from weathering of the crust

At divergent plate boundaries, plates are

moving away from each (trench.)

Active continental margins have

plate boundary at edge of continent, narrow and steep shelf. rocky coast line, and ends in a trench

Large volcanoes on the seafloor that are cone-shaped on top because they never reached sea level are called

seamounts

The correct order of seafloor features from the coast to the mid-ocean ridge is:

shelf, slope, rise, abyssal plain

Deep ocean trenches are associated with

subduction zones

Evidence for continental drift incudes:

the fit of the continents, matching sequence of rocks and mountain chains, past glacial activity, the distribution of organisms

Relatively few abyssal plains are located in the Pacific Ocean due to:

the presence of convergent active margins

passive continental margins have

wide, shallow shelves , continental rise, no plate boundary at edge of continent, and flat sandy coast

The depth of the continental shelves is usually between

0-200 meters

The abyssal plains have an average depth of about

4,500 meters

Approximately what percent of the Earth's surface is covered by ocean?

72%

Passive and Active margins both have

Continental shelf is the first part of the seafloor Is the submerged edge of the continent Submarine canyons form in the continental slope

crust

The lowest density compositional layer of the earth is the

The European "Age of Discovery" ended with:

Ferdinand Magellan's circumnavigation of the globe

ocean ridges

New lithosphere is produced in association with

Characteristics of active continental margins include all of the following except:

broad continental shelves

Submarine canyons were most likely formed by:

erosion by turbidity currents