Wegener
Under the Sea
Plate Tectonics
Boundaries
Stress
100
The name Wegener game to the super-continent that existed 300 million years age
What is Pangea?
100
The adding of new material to the ocean floor
What is Sea-Floor Spreading?
100
This constant motion causes the plates to move
What are Convection Currents?
100
When to plates collide
What is Convergent Boundaries?
100
This type of stress involves pulling
What is tension
200
Term for an ancient organism that has been preserved in rock
What is a Fossil?
200
Long underwater mountain chains formed by divergent boundaries
What are Mid-Ocean Ridges?
200
Breaks in the Earth's crust
What are Faults?
200
When two plates separate
What is Divergent Boundaries?
200
This type of stress involves pushing
What is shearing (shear)
300
Wegener's hypothesis was rejected because he could not prove this
What is How the Plate Move?
300
During subduction, the ocean floor sinks back into the mantle creating these underwater
What are Deep Ocean Trenches?
300
Two continental plates colliding will create this
What are Mountains?
300
When two plates slide past each other
What is Transform Boundaries?
300
This type of stress involves squeezing
Compression
400
Term for the continents slow movement on Earth's surface
What is Continental Drift?
400
Seafloor spreading is caused by this plate boundary
What is divergent
400
Transform boundaries usually cause these
What are Earthquakes?
400
Two continental plates separating will create this
What is a Rift Valley?
400
This is the stress involved with transform boundaries
What is shear(shearing)
500
The remains of a tropical plant in a cold area was proof of this type of evidence
What is Climate?
500
In sea-floor spreading, the oldest crust is found furthest away from the..
What is mid ocean ridge
500
Bonus (worth 3 points): Plates move about 1 cm to about ________ cm a year
What is 12?
500
In the mid-1960s, geologists combined all they knew about plates into a single _____________
What is Theory?
500
This is the stress involved with divergent boundaries
What is tension
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