Ocean Floor

Some inorganic sediments in the ocean basin come from

• radiolarians

• nodules

• icebergs

• foraminiferans

The deepest of Earth’s major oceans is the

• Atlantic

• Pacific

• Indian

• Southern

Sediments are spread over wide areas of the deep-ocean basins by

• nodules

• core samples

• turbidity currents

• wave erosion

Deep-ocean floor sediment that is formed from the shells of radiolarians and diatoms is

• mud

• calcareous ooze

• siliceous ooze

• foraminiferans

Oceanographers can use sonar to calculate the depth of the ocean floor because

• sound waves can penetrate the ocean floor

• echoes do not travel through sea water

• sound waves travel about 1,500 m/s through sea water

• sound waves bounce off the ocean floor

A research vessel that goes deep in the ocean but remains connected to the research ship is a

• submarine robot

• drilling ship

• bathyscaph

• bathysphere

An example of a sea is the

• Indain

• Caribbean

• Arctic

• Southern

Which is caused by glacial periods?

• The continental shelf erodes

• Submarine canyons form in the continental shelf

• Water covers the continental shelf

• The continental shelf grows smaller

Which is NOT a source of deep-ocean basin sediment?

• icebergs

• volcanoes

• meteorites

• earthquakes

A deep-ocean floor sediment that consists of at least 40% clay particles is a form of

• calcareous ooze

• mud

• nodule

• siliceous ooze