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Prentice Hall Earth Science Chapter 14: The Ocean Floor Flashcards | StudBud
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Prentice Hall Earth Science Chapter 14: The Ocean Floor
Prentice Hall Earth Science Chapter 14: The Ocean Floor
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A review that covers the basic points of the ocean floor.
Flashcards
20 cards
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Practice quiz
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Questions
20
Answers
1
The sediments that make up abyssal plains are...
carried there by turbidity currents.
deposited as a result of suspended sediments settling.
2
Which of these are the main ocean basins?
the Pacific Ocean
the Atlantic Ocean
the Indian Ocean
the Arctic Ocean
3
The ocean floor regions are the continental margins, the ocean basin floor, and the _____.
continental shelf
mid-ocean ridge
abyssal plains
submarine canyon
4
Nearly what percent of Earth's surface is covered by the global ocean?
60%
59%
82%
71%
5
Which of these is a major resource from the seafloor?
gas hydrates
manganese nodules
sand and gravel
evaporative salts
6
In the Atlantic Ocean, thick layers of undisturbed _____ cover the continental margin.
sediment
plains
hydrates
submersibles
7
Most _____ are created when bacteria break down organic matter caught in ocean-floor sediments.
continental rises
oceanic gas hydrates
continental shelves
manganese nodules
8
What is the main energy product currently being obtained from the ocean floor?
sand
natural gas
oil
gravel
9
The world ocean can be divided into four main ocean _____.
hydrates
quadrants
basins
ridges
10
True or False:
The Atlantic Ocean has a lot of volcanic and earthquake activity.
False
True
11
_____ sediments consist of shells and skeletons of marine animals and algae.
Hydrogenous
Biogenous
Terrigenous
12
Ocean-floor sediments can be classified according to their origin by what broad categories?
biogenous sediments
hydrogenous sediments
calcareous sediments
terrigenous sediments
13
_____ sediments consist of minerals that crystallize from ocean water with chemical reactions.
Hydrogenous
Terrigenous
Biogenous
14
Trenches form at sites where a _____ descends beneath another and plunges back in the mantle.
continental shelf
submarine canyon
continental rise
moving plate
15
Oceanic crust plunged beneath continental crust results in a narrow continental _____.
rise
margin
slope
shelf
16
_____ sediments consist mainly of grains eroded from continental rocks and moved to the ocean.
Terrigenous
Biogenous
Hydrogenous
17
Oceanic crust plunged beneath continental crust results in a narrow continental slope that...
experiences earthquakes.
causes seafloor spreading.
experiences volcanic activity.
causes a continental rise.
18
New ocean floor is formed at _____ as magma rises between the diverging plates and cools.
abyssal plains
mid-ocean ridges
continental shelves
19
Which of these
doesn't
allow scientists to study the ocean floor?
sonar
subduction
submersibles
sattelites
20
What do continental shelves contain?
huge sand and gravel depostits
large reservoirs of oil and natural gas
important mineral deposits
dangerous amounts of volcanic material
