Earthquakes
Volcanoes
Earthquakes
Volcanoes
EarthQuakes
100
CONTINENTAL CRUST
The relatively thick part of the earths crust that forms the large landmasses.
100
SILICA
The main chemical in magma
100
EARTHQUAKE RISK
Based partly on the earthquake history of an area
100
CONTINENTAL CRUST
Magma that is rich in silica forms when the mantle mixess
100
Is a depression formed when a volcano’s summit collapse or is blown away by an explosive eruption
CALDERA
200
PYROCLASTIC FLOW
A flow of fast-moving cloud of ash, hot gases, and rock that explodes from an erupting volcano
200
SHIELD VOLCANO
Large volcano with gentle slope of basaltic lava
200
LAVA
Molten rock that erupts onto Earth’s surface
200
MAGMA
Molten rock below Earth’s surface
200
P-wave fastest-moving type of seismic wave-causes push-pull motion
PRIMARY WAVE-
300
VISCOSITY
Liquid’s ability to flow
300
HOT SPOT-
Volcano that is not associated with a plate boundary
300
VOLCANIC ASH-
Tiny particles of pulverized volcanic rock and glass
300
A measure of earthquake magnitude
RICHTER SCALE
300
To cause to disperse or disappear
DISSOLVED
400
CINDER CONE VOLCANO-
Small,steep-sided volcano that erupts gas-rich, basaltic lava.
400
MERCALLI SCALE
A measure of damage done by an earthquake
400
VOLCANO-
Vent in the Earth’s crust through which molten rock flows
400
H2o
WATER
400
Boundary where two tectonic plate separate
DIVERGENT
500
COMPOSITE VOLCANO-
What is Large,steep sided volcano that results from explosive eruptions of andesite and rhyolitic s lavas
500
FOCUS
The point where an earthquake begins
500
GASES
Dissolved amounts of viscosity that determines the explosiveness of magma
500
S-wave causes particles in the ground to move side to side and up and down at right angles
SECONDARY WAVE-
500
Magma with high silica content
ANDESITE
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