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What is seafloor spreading?
When two oceanic plates pull apart, magma rises up and creates new crust. This happens over and over again causing the seafloor to get wider.
Who was the first person to introduce the idea of plate tectonics?
 
Alfred Wegener
 
Gregor Mendal
 
Isaac Newton
 
Charles Darwin
What two plates need to interact for a mountains to form?
Continental and Continental
What two plates need to interact for a mid-ocean ridge to form?
Oceanic and Oceanic
What two plates need to interact for a chain of volcanoes to form?
Continental and Oceanic
A long time ago all the continents were connected, what was the name of this supercontinent?
Pangea
When two continental plates pull apart what geologic event or structure occurs?
 
Continental Rift
 
Mid-ocean ridge
 
Oceanic Trench
 
Volcanoes
When two plates slide past each other what geological event occurs?
 
Earthquakes
 
Volcanoes
 
Mountains
 
Oceanic Trench
When two oceanic plates pull apart, what geological event or structure occurs?
 
mid-ocean ridge
 
continental rift
 
chain of volcanoes
 
earthquakes
When two continental crusts collide what geological event forms?
 
Mountains
 
Volcanoes
 
Trench
 
Ridge
There is a chain of volcanoes off the coast of Alaska, earthquakes are frequent in this area. What type of boundary is this on? What type of crusts are involved?
Convergent boundary, oceanic and continental crusts
What are the 3 types of plate boundaries?
Convergent, Divergent and Transform
What is the theory of plate tectonics?
The theory that parts of the crust and upper mantle are broken into sections that can move and interact with each other to cause geologic events and structures.
Two oceanic plates collide, one slides under the other. What geologic event would this cause?
 
Oceanic Trench
 
Continental Rift
 
Chain of Volcanoes
 
Mid-Ocean Ridge
An oceanic crust and a continental crust collide, which plate will be sub-ducted and why?
The oceanic crust will subduct under the continental crust because it is more dense.
At what type of boundary would you expect to find a mid-ocean ridge?
Divergent Boundary
At what type of boundary would you expect to find mountains?
Convergent Boundary
At what boundary would you expect to see frequent earthquakes?
Transform Boundary
What is subduction?
When two plates collide and one goes under the other
When two plates slide past each other
Transform Boundary
When two plates pull away from each other
Divergent Boundary
When two plates collide into each other
Convergent Boundary
What are the two types of crust?
Oceanic and Continental