Volcanoes Test Review
Mr. Watts
2005-2006
The most dangerous type of volcano is called a Composite or Strato volcano.
Where are the three sources of earth’s inner heat? Friction, Original Heat, and
Radioactive Decay
Mauna Kea has the most massive Mountain on earth.
Vog is short for Volcanic Fog
How deep do Magma chambers usually form? 40 – 60 km
How is a Sill formed? Magma squeezes in between rock layers, spreading out in
thin sheets which cools beneath the surface
What was the name of the volcano that erupted in 1902 and killed over 30,000
people? Mont Pelee’
What kind of volcano are the Hawaiian islands? Shield Volcanoes
Pahoehoe is also called Mafic , Basaltic , or Oceanic
How hot is Magma ? 650 – 1500 degrees C / 1200 – 3000 degrees F
What is the name of the Goddess of Fire? Pele
Original heat, Radioactive decay and Friction are the sources of heat within the
earth
What is another name for a Strato Volcano? Composite Volcano
A volcano that has not erupted recently, but has erupted in the recorded history is
called Dormant
Volcanic bombs are the largest type of Pyroclastic debris?
What is geothermal energy? Heat (thermal) energy from inside the earth (geo)
What is an intrusion? Magma, molten rock, which cools beneath the surface
What causes a geyser? Water flows into fissures and is heated by magma. This
boils and when it has enough force, pushes the column of water out
Vocabulary:
Laccolith:Close relative of sill which leaves a dome mountain on the surface
Batholith: Largest igneous intrusion; Pluton with outcrop area > 100 km2
Basalt Plateau: Formed from fissure flows of basalt; Columbia Plateau example
Dike: Intrusion that cuts across rock layer forming a dam-like feature
Sill: Intrusion that squeezes in between rock layers
Shield: Basalt forms a volcano that is wider than tall due to its low viscosity
Volcanic Neck: Magma trapped in volcanic vent cools and solidifies
Cinder Cone:Small, steep sided volcano made mostly of ash and cinders
Stock: Pluton with outcrop area < 100 km2
Vent: The central opening of the volcano; allows magma to erupt onto surface