10.3 Plate Tectonics & Igneous Activity
Understanding Concepts
Critical Thinking
Understanding Concepts Part 2
Standardized Test Prep
100
the chain of volcanoes that are located around the edge of the Pacific Basin
What is the Ring of Fire?
100
chain of volcanoes forms at a convergent boundary between oceanic plate and continental plate?
What is a continental volcanic arc?
100
lava flows that have sharp, jagged surfaces formed when viscous lava cools
What is aa lava flows?
100
the resistance to flow of a substance
What is viscosity?
100
small volcanoes with steep sides
What is cinder cones?
200
Most volcanoes are located at either divergent or convergent boundaries, where plate motions provide mechanisms to form magma.
How are the locations of volcanoes related to plate boundaries?
200
Type of volcano commonly formed at continental volcanic arcs
What is composite cone?
200
lava flows that have smooth, rope like surfaces formed from very fluid basaltic lava
What is pahoehoe lava?
200
types of volcanoes
What are shield, cinder and composite?
200
largest sized volcanoes with gentle slopes
What is shield volcanoes?
300
Intraplate volcanism is caused by hot mantle plumes rising up from the core-mantle boundary, causing decompression melting and forming small areas of volcanic activity on the surface.
What causes intraplate volcanism?
300
Hawaiian Islands and Yellowstone National Park are associated with this zone of volcanism
What is intraplate volcanism?
300
Viscosity determines how easily gases can escape.
Why is a viscous magma volcano a greater threat than a less viscous magma volcano?
300
methods of pyroclastic material classification
What is size and shape?
300
medium sized volcanoes with steep symmetrical sides
What is composite cones?
400
Most of the magma produced each year on Earth is produced at ocean ridges during seafloor spreading
Where is most of the magma produced on Earth on a yearly basis?
400
the rock in a volcanic pipe that is more resistant to erosion and remains standing after the surrounding volcanic cone has been eroded
What is a volcanic neck?
400
Cinder cones commonly erupt once for a short time. After eruption, magma in pipe solidifies and volcano doesn't erupt again.
Why are cinder cones usually small?
400
Viscosity of lava/magma makes volcanoes more _________
What is explosive?
400
determines if a volcano erupts quietly or violently (3 answers)
What is the temperature of magma, magma composition or amount of dissolved gases in magma?
500
Volcanic island arcs are formed when two OCEANIC plates converge to make a subduction zone, forming basalitc magma. Continental volcanic arcs formed when an OCEANIC plate subducts beneath a CONTINENTAL plate, forming silica rich magma
What are differences between volcanic island arcs and continental volcanic arcs?
500
type of volcano associated with quiet eruptions of basaltic lava, forming mainly pahoehoe flows
What is a shield volcano?
500
Mudflow on the slopes of a volcano triggered by heavy rainfall saturating loose, weathered volcanic deposits on steep slopes of volcano without eruption occurring.
What is a lahar?
500
a plume of hot mantle material produced at the core-mantle boundary rises to surface and causes volcanic activity
What is a hot spot?
500
type of eruption formed from magma that is high in silica, high in gas content and low temperature
What is violent/explosive eruption?
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