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Earthquake and Volcanoes Review
Studyguide for Earth and Space Science Chapter 11 and 12
39
Science
11th Grade
10/04/2013

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Term
Composite Volcanoes are also known as
Definition
Stratovolcanoes
Term
Activity involving magma moving onto the surface
Definition
Volcanism
Term
Areas of volcanism within lithospheric plates are known as
Definition
Hot Spots
Term
Scientists plot three intersecting circles to locate an earthquake's
Definition
epicenter
Term
The amount of energy released by an earthquake is also known as its
Definition
Magnitude
Term
The major zone of active volcanoes that encircles the Pacific Ocean is called the
Definition
Ring of Fire
Term
The resistance of lava flow
Definition
Viscosity
Term
The funnel-shaped pit at the top of a volcanic vent
Definition
Crater
Term
Magma that flows on the surface
Definition
Lava
Term
A column of hot, solid material from the deep mantle
Definition
Magma Plume
Term
Produced by Mafic Magma, a runny lava with a low viscosity and few trapped gases
Definition
Quiet erruption
Term
Large rock particles less than 64 mm
Definition
Lapilli
Term
Formed on the ocean floor where one plate subducts under another
Definition
trench
Term
Formed on the overriding plate when two plates with oceanic lithosphere at their boundaries collide
Definition
Island Arc
Term
Produced by felsic magma, a sticky lava with high viscosity and a high amount of trapped gases
Definition
Explosive Eruption
Term
Type of rock that forms when magma cools and hardens
Definition
Igneous Rock
Term
Cracks through which lava flows to Earth's surface
Definition
Fissure
Term
Fragments of rock that form during volcanic eruption
Definition
Pyroclastic Material
Term
Magma that cools and hardens below the crust, before it reaches Earth's surface
Definition
Pluton
Term
Opening in volcano from which lava flows
Definition
Vent
Term
The second fastest seismic wave, can only travel through solids
Definition
Secondary Wave
Term
A tracing of earthquake motion that is recorded by a seismograph
Definition
Seismogram
Term
A sudden return of elstically deformed rock to its undeformed shape
Definition
Elastic Rebound
Term
The fastest seismic wave, can travel through solids, liquids, and gases
Definition
P Wave
Term
Modified Mercali scale
Definition
A scale that measures earthquake intensity
Term
An instrument that records ground vibrations
Definition
Seismograph
Term
Richter Scale
Definition
A scale that measures amount of energy in ground motion
Term
Volcanic activity is frequent in
Definition
island arcs
Term
Magma may sometimes break to the
Definition
Earth's surface
Term
An area in which one lithospheric plate is being moved under another is called a
Definition
Subduction Zone
Term
A seismograph records energy released by an
Definition
Earthquake
Term
Temperature and pressure generally keep rocks in the astenosphere below the
Definition
melting point
Term
Pyroplastic Material is usually thrown from volcanoes that eject
Definition
Felsic Lava
Term
Most earthquakes occur near
Definition
plate boundaries
Term
P waves moving through the Earth can travel through
Definition
  • Solids
  • Liquids
  • Gases
Term
The earthquakes that cause the most damage usually have a
Definition
Shallow Focus
Term
The magnitude of an earthquake is an approximate measure of
Definition
How much energy the earthquake releases
Term
Cinder cones are generally
Definition
Much steeper than shield volcanoes
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