Earth and Space Chapter 20 Test
Which feature in the diagram above represents a guyot?
2
Which feature shown in the diagram above is more extensive in the Atlantic Ocean than in the Pacific Ocean?
2
The research vessel that laid much of the foundation of modern oceanography during the late 19th century was the
H.M.S. Challenger
The deepest of the earth's principal oceans is the
Pacific
Which of the following is a major source of calcium carbonate in organic sediments on the ocean floor?
foraminifera
Which of the following is largely composed of diatoms?
siliceous ooze
Where is subduction taking place in the diagram above?
1
Which region in this diagram represents the continental shelf?
2
Which feature in the diagram above represents a rift zone?
5
Which region in the diagram above is composed of oceanic crust?
5
Approximately what percentage of the earth's surface is covered by oceans?
70%
Which of the following is a part of three other oceans?
Antarctic Ocean
The Gulf of Mexico is a part of what ocean?
Atlantic
Which of the following research vessels was recently used to photograph the interior of the Titanic?
Jason Jr
Which ocean contains the greatest number of deep-sea trenches?
Pacific
Which of the following is farthest from the shoreline?
abyssal plain
The shallowest portion of the continental margin is the
continental shelf
Which part of the ocean floor was exposed to increased erosion and weathering during the glacial periods?
continental shelf
The boundary between continental crust and oceanic crust occurs at the base of the
continental slope
Bathyspheres are self-propelled diving vessels that have freedom of movement.
false
Calcareous ooze is found at the ocean's greatest depths.
false
Icebergs commonly deposit ocean sediments on land.
false
Most deep-ocean sediments come from continental erosion.
false
Most material found in oozes on the deep-sea bottom is derived from the continents.
false
Most trenches are located within the mid-ocean ridge system.
false
Radar is often used to determine ocean depths.
false
Submarine canyons are most often found on mid-ocean ridges.
false
The Alvin is an example of a bathysphere.
false
The continental slope is the portion of the continental margin closest to the shoreline.
false
The finest ocean sediments are found closest to shore.
false
The ocean floor is composed mainly of continental crust.
false
The oceans contain about three-fourths of the earth's water.
false
The shoreline marks the boundary between a continent and the ocean floor.
false
The world's oceans contain more than 97 percent of the earth's mass.
false
Turbidity currents are caused by winds and temperature differences.
false
Underwater continental crust makes up part of the deep ocean basin.
false
Fracture zones are most often found near
mid-ocean ridges
Scientists obtain deep-ocean core samples in order to analyze
ocean-floor sediments
Which of the following is a common type of ocean-bottom mud?
red clay
The difference between a bathysphere and a bathyscaph is that a bathysphere
remains connected to a ship
Which feature is formed where oceanic plates are separating?
rift
Which of the following is composed primarily of diatom skeletons?
siliceous ooze
Which of the following sediments would most likely be found in a sample from the ocean floor at a depth of 5,000 m?
siliceous ooze
Which of the following describes a seamount?
submerged volcanic mountain at least 1,000 m high
A bathyscaph is a submersible that is self-propelled and free-moving.
true
Abyssal plains are the flattest regions on earth.
true
All of the earth's principal oceans are interconnected.
true
Guyots are formed by the erosion and subsidence of seamounts.
true
Many of the features on the ocean floor were first detected by sonar.
true
Mineral deposits called nodules probably formed through precipitation of substances dissolved in ocean water.
true
Most siliceous ooze is found around the continent of Antarctica.
true
Samples of deep-sea sediments are often obtained by taking core samples.
true
Silica and calcium carbonate are commonly found in organic ocean sediment.
true
Siliceous ooze is an example of an organic sediment.
true
The Pacific Ocean is the largest of the earth's principal oceans.
true
The coarser sediments of the continental margin are usually found close to shore.
true
The earth is the only known planet with a covering of liquid water.
true
The global ocean is divided into three principal oceans.
true
The width of the continental shelf varies depending on its location.
true
When the remains of the Titanic were discovered, many of the photographs of the inside of the ship were taken with a robot craft.
true
`Meteorites contribute to ocean sediments.
true
Submarine canyons most likely formed due to erosion by
turbidity currents
