Continental Drift
Plate Tectonics
Earthquakes
Volcanoes
Crust Deformations
100
The similar age and types of rocks from western Africa and eastern Brazil support this theory.
What is continental drift?
100
Paleomagnetism provided conclusive evidence of this process.
What is Seafloor spreading?
100
Most earthquakes occur near these.
What are plate boundaries?
100
This is an area in which one lithospheric plate is being moved under another.
What is a Subduction Zone?
100
Up-and-down motions of the crust is called this.
What is isostatic adjustment?
200
This is the term Wegener used to describe the ancient single landmass.
What is Pangea?
200
Most Divergent boundary locations are marked by these.
What are mid-ocean ridges?
200
This is the approximate measure of how much energy an earthquake releases.
What is magnitude?
200
A string of volcanoes that form along a trench.
What is an island arc/volcanic arc?
200
A collision between a continental plate and an oceanic plate is most likely to produce.
What is mountain ranges
300
This evidence found in tropical regions of southern Africa and South America most strongly supports the theory that the continents were once joined.
What are fossils?
300
Seafloor spreading occurs at this type of plate boundary.
What is Divergent?
300
This is the place where slippage first occus.
What is the focus?
300
Pyroclastic material would most likely produce this type of eruption.
What is a violent/explosive eruption?
300
What are the largest groups of mountains on the earth called?
What is belts
400
This is the earth's layer of solid rock that flows under pressure.
What is the asthenosphere?
400
The theory of plate tectonics is most directly based on the interactions of these types of plates riding on the asthenosphere.
What is lithospheric?
400
To determine how far away from a seismogrph station an earthquake occured, scientists plot the difference in arrival time between these.
What are P & S waves?
400
The broad feature formed by quiet eruptions of thin lava flows is called this type of volcano.
What is a shield volcano?
400
What type of mountains are commonly located where continents have collided?
What is folded
500
Many scientists think that the movement of lithospheric plates is caused by these.
What are convection currents?
500
When friction prevents the rocks on either side of a fault from moving past each other, the fault is said to be this.
What is locked?
500
This is used to express the intensity of an earthquake.
What is the Mercalli scale?
500
Cinder cones are generally formed when volcanoes eject these.
What are solid fragments?
500
During collisions between continental and oceanic crusts, magma is produced when the oceanic crust is partially...?
What is melted
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