Podcast
Questions and Answers
What occurs when an oceanic plate collides with a continental plate at a destructive boundary?
What occurs when an oceanic plate collides with a continental plate at a destructive boundary?
- Both plates merge to create new crust.
- The oceanic plate subducts under the continental plate. (correct)
- The continental plate subducts under the oceanic plate.
- The oceanic plate is completely destroyed.
What is formed at the subduction zone during the collision of oceanic plates?
What is formed at the subduction zone during the collision of oceanic plates?
- An ocean trench (correct)
- A mountain range
- A mid-ocean ridge
- A volcanic hotspot
Which of the following gases is NOT typically released from the crust during subduction?
Which of the following gases is NOT typically released from the crust during subduction?
- Carbon dioxide
- Oxygen (correct)
- Sulphur dioxide
- Water vapor
What geological feature is formed over time as a result of volcanic activity at a destructive plate boundary?
What geological feature is formed over time as a result of volcanic activity at a destructive plate boundary?
What is the primary outcome when two continental plates collide?
What is the primary outcome when two continental plates collide?
Which of the following statements is true regarding earthquakes at destructive plate boundaries?
Which of the following statements is true regarding earthquakes at destructive plate boundaries?
Which of the following best describes the process of subduction at a destructive plate boundary?
Which of the following best describes the process of subduction at a destructive plate boundary?
What type of volcanic feature is typically seen along destructive plate boundaries on continental plates?
What type of volcanic feature is typically seen along destructive plate boundaries on continental plates?
Flashcards
Convergent Plate Boundaries
Convergent Plate Boundaries
Regions where tectonic plates collide, often leading to subduction.
Subduction
Subduction
The process wherein a heavier plate sinks under a lighter one at a boundary.
Ocean Trench
Ocean Trench
A deep, arc-shaped depression in the ocean floor formed at a subduction zone.
Explosive Volcanic Eruptions
Explosive Volcanic Eruptions
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Island Arc
Island Arc
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Andes Volcanic Arc
Andes Volcanic Arc
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Fold Mountains
Fold Mountains
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Earthquakes at Destructive Boundaries
Earthquakes at Destructive Boundaries
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Study Notes
Destructive Plate Boundaries
- Convection currents in the Earth's mantle cause plates to collide at convergent boundaries.
- Oceanic plates collide, the denser plate subducts beneath the less dense.
- Subduction creates an arc-shaped ocean trench.
- Fluids and gases released during subduction cause melting and magma formation.
- Magma rises, creating explosive volcanic eruptions.
- Volcanic island arcs form parallel to the trench (e.g., Japanese islands).
- Oceanic crust is destroyed where oceanic and continental plates collide.
- Volcanic mountain ranges (e.g., Andes) form parallel to subduction zones.
- Fold mountains form due to buckling of continental crust.
- Powerful earthquakes occur due to rocks locking and releasing stress.
- Continental plates colliding cause no crust destruction, only buckling and mountain formation (e.g., Alps).
- Earthquakes are generated when convection currents force plates to move suddenly.
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