Podcast
Questions and Answers
Which of the following is NOT one of the three broad subdivisions of the ocean floor?
Which of the following is NOT one of the three broad subdivisions of the ocean floor?
The two types of continental margins are passive and active.
The two types of continental margins are passive and active.
True (A)
On the ocean side of the continental shelf, the steep continental slope merges into a more gradual incline known as the _____________.
On the ocean side of the continental shelf, the steep continental slope merges into a more gradual incline known as the _____________.
continental rise
Deep-ocean trenches are associated with passive continental margins.
Deep-ocean trenches are associated with passive continental margins.
Signup and view all the answers
The _________ system is a broad, rugged, elevated feature on the ocean floor that forms a continuous belt that winds around the globe.
The _________ system is a broad, rugged, elevated feature on the ocean floor that forms a continuous belt that winds around the globe.
Signup and view all the answers
Which portion of the continental margin is the steepest?
Which portion of the continental margin is the steepest?
Signup and view all the answers
Materials deposited by turbidity currents contribute to the formation of _________.
Materials deposited by turbidity currents contribute to the formation of _________.
Signup and view all the answers
This diagram represents a(n) ___________ continental margin.
This diagram represents a(n) ___________ continental margin.
Signup and view all the answers
Earth-orbiting satellites can be used to map the ocean floor.
Earth-orbiting satellites can be used to map the ocean floor.
Signup and view all the answers
What instrument is used to map the topography of the ocean floor?
What instrument is used to map the topography of the ocean floor?
Signup and view all the answers
A deep narrow valley at the summit of the oceanic ridge is called a(n) _________.
A deep narrow valley at the summit of the oceanic ridge is called a(n) _________.
Signup and view all the answers
Seamounts are steep-sided volcanic peaks on the ocean floor.
Seamounts are steep-sided volcanic peaks on the ocean floor.
Signup and view all the answers
Deep-ocean trenches are associated with:
Deep-ocean trenches are associated with:
Signup and view all the answers
Abyssal plains are part of the continental margin.
Abyssal plains are part of the continental margin.
Signup and view all the answers
Deep, steep-sided valleys found on the continental slope and rise are known as:
Deep, steep-sided valleys found on the continental slope and rise are known as:
Signup and view all the answers
Passive continental margins experience very little volcanic activity and few earthquakes.
Passive continental margins experience very little volcanic activity and few earthquakes.
Signup and view all the answers
The continental margins surrounding the Atlantic Ocean are primarily active continental margins.
The continental margins surrounding the Atlantic Ocean are primarily active continental margins.
Signup and view all the answers
At divergent plate boundaries ____________.
At divergent plate boundaries ____________.
Signup and view all the answers
New oceanic crust is created at divergent boundaries at a rate of about:
New oceanic crust is created at divergent boundaries at a rate of about:
Signup and view all the answers
Most divergent boundaries are located:
Most divergent boundaries are located:
Signup and view all the answers
Which of these water bodies was once a rift valley?
Which of these water bodies was once a rift valley?
Signup and view all the answers
The mechanism that has generated the floors of the world's oceans is called _________.
The mechanism that has generated the floors of the world's oceans is called _________.
Signup and view all the answers
Study Notes
Ocean Floor Subdivisions
- Coastal plains are not a subdivision of the ocean floor.
- Main subdivisions of the ocean floor include continental margins, ocean basins, and the oceanic ridge.
Continental Margins
- Two types of continental margins: passive and active.
- Steepest portion of the continental margin is the continental slope.
- Active continental margins are associated with deep-ocean trenches and volcanic activity.
Ocean Floor Features
- The continental slope merges into the continental rise, which shows a more gradual incline.
- The mid-ocean ridge is a significant feature, forming a continuous underwater mountain belt.
- Deep-sea fans are formed by materials deposited from turbidity currents.
- Submarine canyons are steep-sided valleys found on the continental slope and rise.
Mapping the Ocean Floor
- Earth-orbiting satellites can effectively map the ocean floor.
- Echo sounders are instruments specifically used to map the ocean floor's topography.
Geologic Phenomena
- A rift valley is a deep narrow valley found at the summit of the oceanic ridge, indicating divergent plate boundaries.
- Seamounts are defined as steep-sided volcanic peaks located on the ocean floor.
- New oceanic crust forms at divergent boundaries at a rate of approximately 5 cm per year.
Rift Valleys and Oceanic Changes
- The Red Sea is an example of a body of water that was previously a rift valley.
- Seafloor spreading is the mechanism responsible for generating the ocean floor, contributing to new lithosphere formation.
Abyssal Plains
- Abyssal plains are not part of the continental margin; they are flat regions of the ocean floor.
Volcanic Activity and Earthquakes
- Passive continental margins generally exhibit little volcanic activity and experience few earthquakes.
- Continental margins surrounding the Atlantic Ocean are primarily passive, not active.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Explore the different subdivisions and features of the ocean floor in this quiz. Learn about continental margins, ocean basins, and significant structures like the mid-ocean ridge and submarine canyons. Test your knowledge on how oceanographers map the ocean floor using advanced technology.
