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Questions and Answers
What process involves the sliding of a seafloor beneath a continent or island arc?
A subduction zone is formed when which of the following occurs?
What is a volcano called that has not erupted in recent history but could erupt in the future?
Composite volcanoes are characterized by which type of eruptions?
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During an earthquake, if you are several stories up in a tall building, what is the safest action to take?
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Where do earthquakes typically occur?
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If a tectonic plate moves 2 cm per year, how far will it move in 1 million years?
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In an office setting, what presents the greatest falling hazard?
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What is produced when plates slide against each other in opposite directions?
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What type of plate boundary is the San Andreas fault in California?
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Which of the following best describes Albert Wegener?
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Which feature would you expect to find at an ocean-continent convergent boundary?
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Which of the following was not used by Wegener as evidence of continental drift?
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Where do most severe earthquakes occur?
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Which of the following features would you expect to find at an ocean-ocean convergent boundary?
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Which is NOT a primary plate?
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Magma is composed of which of the following?
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Oceanic plates are primarily made of which type of rock?
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What type of tectonic plate interaction is responsible for most earthquakes?
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At what type of boundary do plates move away from one another?
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What type of fault is the San Andreas Fault an example of?
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The collision between which types of plates formed the Alps and Himalayas?
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What is the term for the area where two or more tectonic plates meet?
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What is the process called that produces new sea floors between two diverging plates?
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Study Notes
Magma Composition
- Composed of elements, gases, and minerals; thus, the answer is all of the above.
Oceanic Plates
- Made primarily of basaltic rocks.
Pacific Ring of Fire
- An area where the Pacific Tectonic Plate encounters others, resulting in earthquakes through one plate sliding under another or colliding.
Plate Boundaries
- Divergent boundaries: Plates move away from one another.
- Convergent boundaries: Plates collide, can form mountains or subduction zones.
- Transform boundaries: Plates slide past one another.
Fault Types
- San Andreas fault is a prime example of a strike-slip fault.
Mountain Formation
- The Alps and Himalayas formed from the collision of two continental plates.
Plate Boundary Terminology
- The area where two or more plates meet is called a plate boundary.
East African Rift
- An example of a divergent plate boundary.
Mantle-Core Interface
- Known as the Gutenberg discontinuity.
Seafloor Creation
- New seafloors are produced through the process of ocean floor spreading between diverging plates.
Volcanic Ejection
- Solid molten rock fragments ejected from volcanoes are referred to as ash.
Tectonic Plate Separation
- An area where tectonic plates are separating is known as a divergent zone.
Subduction Definition
- Sliding of seafloor beneath a continent or island arc is referred to as subduction.
Subduction Zones
- Formed when one tectonic plate sinks beneath another, typically at convergent boundaries.
Volcano Classification
- A volcano not currently erupting but could in the future is called dormant.
Composite Volcanoes
- Typically characterized by explosive eruptions.
Earthquake Safety
- Taking an elevator during an earthquake in a tall building is not safe; stairwells are recommended.
Earthquake Locations
- Most earthquakes occur along plate boundaries, not in the middle of tectonic plates.
Long-term Plate Movement
- If a plate moves 2 cm per year, it will move approximately 20 kilometers in one million years.
Tectonic Plate Features
- Severe earthquakes occur at plate boundaries; primary plates include North American, Australian, Philippine, and Pacific plates.
Albert Wegener
- A geologist known for proposing the theory of continental drift.
Earthquake Consequences
- Earthquakes can trigger tsunamis and landslides, in addition to intense ground shaking.
Convergent Boundary Features
- Ocean-continent convergent boundaries feature deep ocean trenches, earthquakes, and volcanic mountain chains.
Continental Drift Evidence
- Wegener's evidence included fossils, geometric continent fit, and glaciation, but not magnetic anomalies on the seafloor.
Continent-Continent Convergence
- Results in deep ocean trenches and volcanic mountain chains; characterized by suture zones.
Pacific Ring of Fire Activity
- It is a ring of significant volcanic and seismic activity, contrary to being one of the least active regions.
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Description
Test your knowledge on the composition of magma and the dynamics of tectonic plates. This quiz covers crucial concepts such as the Pacific Ring of Fire and the types of rock that make up oceanic plates. Challenge yourself with questions that explore the hazards of unsecured materials in geology.
