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Knipp - ch.4 (plate tectonics)
chapter 4
14
Geology
7th Grade
12/08/2008

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Term
original large land mass
Definition
Pangaea
Term
he proposed continental drift theory
Definition
Alfred Wegener
Term
theory that suggested that continents have moved slowly to their current locations
Definition
continental drift
Term
T/F continental plates are less dense than oceanic plates
Definition
true
Term
T/F the mid-Atlantic Ridge is an example of seafloor spreading
Definition
true
Term
sections of the Earth's crust that float around on the mantle
Definition
plates or tectonic plates
Term
where two tectonic plates meet
Definition
plate boundaries
Term
where an oceanic and continental plate meet or collide
Definition
subduction
Term
where two continental plates collide
Definition
continental collision
Term
where two continental plates pull apart
Definition
rift valley
Term
seafloor spreading occurs at this type of boundary
Definition
divergent boundary
Term
boundary where plates move apart
Definition
divergent
Term
boundary where plates move towards each other
Definition
convergent
Term
boundary where two plates slide past each other
Definition
transform boundary
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