AQA A-Level Geography 7037
Water and Carbon Cycles
Hot Desert Systems and LandscapesLandscape
Coastal Systems and LandscapesLandscape
Glacial Systems and LandscapesLandscape
HazardsHazards or ecosystems
Ecosystems Under StressHazards or ecosystems
Global Systems and Global Governance
Changing Places
Contemporary Urban EnvironmentsHuman option
Population and the EnvironmentHuman option
Resource SecurityHuman option
Hazards
Plate Margins and Seismicity
- 4 things to know
- Component 1
Overview
Recall questions on what happens at destructive, constructive and conservative margins, and on the meaning of seismicity.
What you need to know
Answer each one before you reveal it.
Describe the characteristics of seismicity at constructive plate margins.
What are island arcs and at what type of plate boundary do they form?
Describe constructive and conservative plate margins, and define seismicity.
Questions from this subtopic
Each one with the model answer underneath.
- 1
What occurs at a destructive plate margin?
Model answer
Plates converge and one plate is subducted beneath another, or continental plates collide.
- 2
Define a constructive plate margin.
Model answer
A constructive plate margin occurs where plates diverge and new crust is formed.
- 3
What characterises a conservative plate margin?
Model answer
Plates slide past each other horizontally with no creation or destruction of crust.
- 4
What is seismicity?
Model answer
Seismicity refers to earthquake activity caused by the sudden release of energy from stress accumulation at plate boundaries.
- 5
Define vulcanicity.
Model answer
Vulcanicity refers to all processes associated with the transfer of magma and gases from the interior to the surface.
- 6
At what depths does seismicity occur at destructive margins, and what is this zone called?
Model answer
Seismicity occurs at shallow, intermediate, and deep levels along the subducting slab, known as the Benioff zone.
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