Volcano and Plate Tectonics
Volcano Activity
Volcanic Landforms
It is Getting Hot in Here
More Volcanoes!
100
A weak spot in the crust where molten material comes to the surface.
What is a volcano?
100
Liquid magma rises upward through the cracks because of this.
What is magma is less dense than the surrounding liquid?
100
Volcanoes that are tall, cone-shaped mountains and have alternating lava flows and explosive eruptions of ash, cinders, and bombs.
What is composite volcanoes?
100
What lava is called before it reaches the surface.
What is magma?
100
Name one of the two countries in the Atlantic Ocean where volcanoes rise out of the mid-ocean ridge above the ocean's surface.
What is Iceland or the Azores Island?
200
The process that creates island arcs.
What is subduction?
200
Cooler, slow-moving lava made from quiet eruptions.
What is pahoehoe?
200
Magma that forces itself across rock layers.
What is a dike?
200
Thin, runny lava built up at a high, level area.
What are lava plateaus?
200
A volcano that is erupting or may erupt in the near future.
What is an active volcano?
300
An area where magma from deep within the mantle melts through the crust above it.
What is hot spot?
300
The main factor that makes a difference between a quiet eruption and an explosive eruption.
What is silica content? If the magma is high in silica, it is thick and sticky, making it get stuck and explode suddenly.
300
Landform that forms when rising magma, blocked by layers of rock, forcing rock to bend upward.
What is a dome mountain?
300
A huge hole left by the collapse of a volcanic mountain.
What is a caldera?
300
Name three hazards volcanoes can cause.
What is set fires, bury towns, damage crops, clog car engines, roofs collapse, landslides, and avalanches?
400
The two plates that create island arcs.
What are two oceanic plates?
400
Occurs when an explosive eruption hurls out ash, cinders, and bombs.
What is a pyroclastic flow?
400
Large mass of rock formed when a large body of magma cools inside the crust.
What is batholith?
400
A major volcanic belt that circles the Pacific Ocean.
What is the Ring of Fire?
400
Volcanoes that occur at a mid-ocean ridge occur at this type of boundary.
What is a divergent boundary?
500
How do volcanoes form at divergent boundaries?
What is two plates move apart and lava pours out of the cracks on the ocean floor?
500
What kind of magma and eruption is likely to occur in a volcano having magma high in silica?
What is thick and sticky magma and explosive eruption?
500
The part of the volcano that hardens and wears away to make the volcanic neck.
What is the pipe?
500
Slower moving lava flows, hardening in chunks is this type of lava made from this type of eruption
What is aa made from a quiet eruption?
500
The Hawaiian Islands and Yellowstone National Park in Wyoming were formed due to this.
What is a hot spot?
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