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Divergent Boundaries
Convergent Boundaries
Continental Drift
Sea Floor Spreading/Subduction
Plate Tectonics
100
When continental-continental crust diverges, these landforms are created.
What are rift valleys?
100
When continental-continental crust diverges, these landforms are created.
What are rift valleys?
100
The supercontinent that began to break up 225 million years ago
What is Pangea?
100
The landform created where sea-floor spreading occurs.
What is a mid-ocean ridge?
100
The name for a piece of earth's crust that moves slowly but constantly.
What is a lithoshperic (or tectonic) plate?
200
The kind of crust that tends to be relatively thin, dense, and made primarily of basalt
What is Oceanic Crust?
200
Valleys in the ocean floor created by the collision of oceanic-oceanic crust or oceanic-continental crust.
What are ocean trenches?
200
The scientist who proposed the idea of continental drift
Who is Alfred Wegner?
200
The scientist who first mapped the ocean floor and identified mid-ocean ridges
Who is Harry Hess?
200
It is the place in the ocean where you would find the oldest fossils.
What is far from the mid-ocean ridge?
300
An underwater chain of mountains created where oceanic-oceanic crust diverges
What is the mid-ocean ridge?
300
A chain of islands formed when oceanic-oceanic crust converges.
What are volcanic island arcs?
300
The reason that Wegner's ideas were not accepted in his time .
What is the lack of a description of HOW the continents moved?
300
Convergent plate boundaries are this type of force.
What is destructive?
300
The Himalayan mountains occur at this type of boundary.
What is a continental-continental convergent boundary?
400
A divergent boundary is considered to be this type of "margin".
What is "constructive"?
400
The process where the denser crust is forced back into the mantle to be recycled.
What is subduction?
400
Two pieces of evidence that made Wegner think the continents were drifting.
What is -fossils of the same plants & animals on different continents, -shape of the continents fitting together like puzzle pieces, -evidence from glaciers and climate change -similar rock strata and mountain chains
400
A zone where one plate sinks under another, forming a trench.
What is a subduction zone?
400
A plate boundary where no new crust is created or old crust is destroyed.
What is a Transform plate boundary?
500
The only place the mid-ocean ridge rises above the water
What is Iceland?
500
An example of volcanic mountains formed by the collision of continental-oceanic crust.
What is (almost any ocean volcanic mountain range)?
500
The youngest rocks are found...
What is "closest to the mid-ocean ridge?
500
The three mechanisms that we now know move the lithospheric plates?
What is -convection currents in the mantle -slab pull -ridge push
500
They are the TWO reasons why "many" Hawaiian Islands have formed?
What are a long-lived, stationary HOT SPOT and movement of the Pacific Tectonic Plate toward the northwest?