General Tectonics
Plate Evidence
Divergent Boundaries
Convergent Boundaries
Causes of Motion
100
Rigid sections of the lithosphere that move as a unit over the athenosphere.
What is a Plate
100
strips of alternating polarity as mirror images across the ocean ridges.
What is seafloor spreading.
100
An example of Divergent plate boundary located in Africa.
What is African Ridge Valley.
100
This occurs when one oceanic plate is forced down into the mantle beneath a second plate.
What is a Subduction Zone.
100
The driving force for plate movement.
What is Convection.
200
The type of boundary that occurs when two plates move together.
What is Convergent Boundary.
200
Link between deep-focus earthquakes and ocean trenches.
What is earthquake patterns.
200
Elevated zones on the ocean floor.
What is Oceanic Ridges.
200
These landforms form as volcanoes emerge form the sea.
What is Volcanic Island arcs.
200
The motion of matter resulting from changes in temperature.
What is Convective Flow.
300
The type of boundary that occurs when two plates move apart.
What is Divergent Boundary.
300
Magnetism in rock bodies that helps to determine the location of the magnetic poles at the time the rock became magnetized.
What is Paleomagnetism.
300
This example of a divergent boundary helps to produce a new oceanic lithosphere.
What is Seafloor Spreading.
300
When two continental plates collide to produce new mountain ranges.
What is Continental-Continental Boundary.
300
Cool, dense oceanic crust sinks into the mantle and pulls the lithosphere along.
What is Slab-pull.
400
Two plates grind past each other without the production or destruction of the lithosphere.
What is Transform fault boundaries.
400
Concentration of heat in the mantle capable of producing magma that rises to the Earth's surface.
What is Hot Spots.
400
Deep faulted stuctures on the seafloor or on land.
What is Rift Valleys.
400
When two oceanic slabs converge and one slides beneath the other to form volcanoes on the ocean floor.
What is Oceanic-Oceanic Boundary.
400
Causes the oceanic lithosphere to slide down the sides of the oceanic ridge under the pull of gravity.
What is Ridge-push.
500
Crust and upper mantle behave as a strong rigid layer that floats atop the asthenosphere.
What is Plate Tectonics theory.
500
Rocks show the SAME magnetism as the present magnetism field.
What is Normal Polarity.
500
Spreading centers that develop within a continent.
What is Continental Rifts.
500
Denser oceanic slab sinks into the athenosphere causing pockets of magma to develop and rise.
What is Oceanic-Continental Boundary.
500
HOT mantle material are towards the surface that contains an unequal distribution of heat. (igneous activity)
What are Mantle plumes.
M
e
n
u