Plate Tectonics
(Matching)
(Matching)
The study of movement and changes in rocks that make up earth's crust.
Tectonics
The name Alfred Wegner gave to his theorized supercontinent.
Pangea
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Shearing Stress
What is an earthquake?
Seismic waves move the ground and when they reach the earth's surface.
The point on the surface directly above an earthquakes focus.
Epicenter
A very large ocean wave caused by a sudden movement of the ocean floor.
Tsunami
Blobs of molten rock that are lobbed in the air by a volcano.
What is the difference between and active and an alive volcano?
An active volcano is likely to erupt soon, an alive volcano is currently erupting.
The point at which one tectonic plate meets another.
Plate Boundary
This biblical event can support Wegner's theory.
The Flood
---> M <---
Folding
What is magnitude?
The strength of an earthquake.
A break in the earth's crust along which rocks move.
Fault
The time period between earthquakes.
seismic gap
A large intrusion made of several plutons.
Batholith
What causes a volcano to bulge?
Gas and magma build up.
The theory that the continents can move apart from each other and have done so in the past.
Continental Drift
What is orogenesis?
-----><-----
Compressional Stress
What do seismologists do?
Study earthquakes
An instrument that measures and records seismic waves.
What is the scientific definition of a volcano?
A vent or opening in the earth's crust through which magma, steam ashes, and gases are forced.
Solid extrusive materials such as ash and rock that are thrown aloft.
Pyroclast
What geological event can predict a volcanic eruption?
Earthquakes
A mountain chain that forms on the ocean floor where tectonic plates pull apart.
Oceanic Ridge
Alfred Wagner's theory about the continents.
Continental Drift
DD
Faulting
How does an earthquakes focus affect it's experience on the surface?
The deeper the focus, the less damage on the surface.
The distance a fault moved, and the force used to move it.
Momentum Magnitude
Where do most volcanoes occur?
Plate Boundaries
A body of magma that has hardened underground
Pluton
Why is the Pacific Ocean called the Ring of Fire?
Because of the large number of volcanoes located there.
The process of one tectonic plate being pushed under another tectonic plate.
Subduction
Draw a picture of the following three fault boundaries:
Convergent
Divergent
Transform
Convergent ------> <-------
Divergent <------- ------->
Transform ----------->
<-----------
<----- ------>
Tensional Stress
The formula used to calculate the magnitude of an earthquake.
Richter Scale
What are the three types of plate collisions?
continental-continental
Oceanic-Oceanic
Oceanic-continental
A structure of hardened lava that forms inside a vent.
Plug