A mass of rock formed when a large body of magma cooled inside the crust.
What is a batholith.
100
A major volcanic belt that rims the Pacific Ocean.
What is the Ring of Fire?
100
This type of volcano has both quiet and explosive eruptions.
What is a composite volcano?
100
Hot and fast moving lava.
What is pahoehoe?
200
the expulsion of ash, cinders, bombs, and gases during an explosive vocanic erution.
What is pyroclastic flow?
200
Rock formed when magma squeezes between layers of rock.
What is a sill?
200
A type of hot spring that erupts as a fountain of water and steam.
What is a geyser?
200
Forms at the top of a volcano around the central vent.
What is a crater?
200
Earth's moon, Mercury, Venus, Mars, the moons of Jupiter and Neptune.
What are bodies in the solar system showing signs of volcanism?
300
A molten mixture of rock-forming substances, gases, and water from the mantle.
What is magma?
300
Gases trapped in magma rush through an opening at the Earth's surface, carrying magma with them.
What is a volcanic eruption?
300
slab that forms when magma forces itself across rock layers.
What is a dike?
300
Particles ranging from the size of a baseball to the size of a car spewed by some volcanoes.
What are bombs?
300
thin layers of lava pour out a vent and harden on top of previous layers, gradually building a wide, ,gently sloping mountain.
What is a sheild volcano?
400
A weak spot in the crust where molten material comes to the surface.
What is a volcano?
400
Two oceanic plates collide resulting in subduction and a deep ocean trench. The subducted plate melts to magma which seeps upward, breaks through the crust, and creates volcanoes.
What is how is an island arc formed?
400
An enormous eruption empties the main vent and chamber of this, causing the walls to collapse.
What is a caldera.
400
High level area formed by repeated lava flows.
What is a lava plateau?
400
lava flows, clouds of ash and hot volcanic gases, landslides, and avalanches of mud, snow, and rock.
What are possible volcano hazards?
500
temperature, amount of silica, and dissolved gasses.
What determines how thick or thin magma is?
500
Lava explodes out, hardens to ash, cinders, and bombs.
What is a cinder cone volcano?
500
Diverging plate boundaries, converging plate boundaries, hot spots.
What are the places that volcanoes occur at?
500
Potassium and phosphorus are released, both of which are needed by plants.
What are two substances released when volcanic ash breaks down?
500
The Cascade Mountain Range in Washington state lies parrallel with the eastern boundary of this plate. l