Earthquakes
Volcanoes
Plate tectonics
key terms
Misc.
100
earthquake
What is the vibrations caused by movement of rock along a fault
100
sill
What is feature in Earth's crust where magma pushes into "veritical" cracks and hardens
100
Continental drift
What is Alfred Wagner's hypothesis of the earth's continents being joined as a single land mass
100
batholith
What is a feature formed underground where magma has cooled form a large igneous rock
100
Moho discontinuity
What is the Theory that infers seismic waves abruptly speed up as they leave the crust and enter the mantle
200
lithosphere
What is the outermost layer of the earth
200
dike
What is a feature in the Earth's crust where magma squeezes into "horizontal" cracks and hardens
200
convergent boundaries
What is a boundary also called "destructive"
200
subduction
What is the process that occurs at convergent plate boundaries in which old crust pushed back into the mantle
200
base isolators
What is the protection added to new structures to make them more flexible and less likely to be destroyed during an eartquake
300
fault
What is the break in the Earths crust along which rocks can move
300
caldera
What is a feature formed when a crater collapses forming a large bowl shape which may eventually fill with water.
300
transform
What is a boundary also called "conservative"
300
mantle
What is the plastic-like layer of the Earth that flows under pressure
300
l-waves
What is the seismic wave that starts on the surface
400
epicenter
What is the point on Earth's surface directly above the focus
400
exticnt
What is a volcano that has not erupted in recorded history.
400
Glossopteris
What is a extinct fossil that helps support the Theory of Continental Drift
400
plates
What is large sections of the Earths crust that move on the asthenosphere
400
focus
What is the poit in the Earth's crust which energy is released
500
seismic station
What is a place where data about seismic activity is observed
500
volcanologist
What is a scientist who specializes in the study of volcanoes.
500
Mid-ocean ridge
What is an ocean feature that forms due to subduction
500
s-waves
What is the type of seismic wave that causes most damag during an earthquake
500
Alfred Wagner
What is the scientists name who proposed the Theory of Continental Drift
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