Podcast
Questions and Answers
What geological feature is primarily formed at divergent plate boundaries?
What geological feature is primarily formed at divergent plate boundaries?
- Mid-ocean ridges (correct)
- Mountain ranges
- Trenches
- Volcanoes
Which of the following is an effect of convergence between two oceanic plates?
Which of the following is an effect of convergence between two oceanic plates?
- Development of volcanic island arcs (correct)
- Formation of rift valleys
- Formation of a mid-ocean ridge
- Creation of seafloor spreading
What is the relationship between the distance from a mid-ocean ridge and the age of the seafloor?
What is the relationship between the distance from a mid-ocean ridge and the age of the seafloor?
- The seafloor age remains constant regardless of distance
- The seafloor age increases with increasing distance (correct)
- The seafloor age decreases with increasing distance
- There is no correlation between distance and age
Which geological phenomenon is primarily associated with transform plate boundaries?
Which geological phenomenon is primarily associated with transform plate boundaries?
What type of boundary is primarily responsible for the formation of deep ocean trenches?
What type of boundary is primarily responsible for the formation of deep ocean trenches?
Flashcards
Mid-Ocean Ridge
Mid-Ocean Ridge
A long, underwater mountain range formed at divergent plate boundaries where new oceanic crust is created.
Oceanic Trench
Oceanic Trench
A deep, narrow trench in the ocean floor formed at convergent plate boundaries where one plate subducts beneath another.
Earthquakes
Earthquakes
Sudden movements of the Earth's crust caused by the release of built-up energy at fault lines, often occurring at plate boundaries.
Volcanoes
Volcanoes
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Seafloor Spreading
Seafloor Spreading
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Study Notes
Plate Boundary Formations
- Mid-ocean ridges are formed by divergent plate boundaries where plates move apart, allowing magma to rise and create new crust.
- Trenches are created at convergent plate boundaries where one plate subducts (slides under) another. Subduction zones are locations for deep earthquakes.
- Earthquakes can occur along any type of plate boundary, but are most common at transform boundaries (where plates slide past each other) and at convergent boundaries (where plates collide). Fault lines are key to understanding earthquake locations.
- Volcanoes are frequently associated with convergent plate boundaries, where magma rises to the surface. Divergent boundaries also produce volcanoes.
- Mountains form at convergent plate boundaries where colliding plates crumple and uplift the Earth's crust.
- Seafloor spreading is the process where new oceanic crust is formed at mid-ocean ridges and moves away from the ridges.
Seafloor Spreading and Age
- The age of seafloor rock increases with increasing distance from mid-ocean ridges.
- This relationship is a key indicator of the process of seafloor spreading.
- Rock farthest from a mid ocean ridge provides the oldest, and rock closest to a mid-ocean ridge provides the youngest.
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