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knipp
knipp - plate tectonics
15
Geology
7th Grade
12/04/2012

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Cards

Term
continental drift
Definition
the theory that the continents have moved slowly to their current location
Term
Pangaea
Definition
the original land mass
Term
Alfred Wegener
Definition
proposed theory of continental drift
Term
clues that back up continental drift
Definition
1) fossil of similar plants and animals found all over the world
2) glacier evidence in warm climates
3) similar rock types found on both sides of the Atlantic Ocean
Term
seafloor spreading
Definition
theory proposing that magma under crust moves crustal plates apart
Term
Harry Hess
Definition
proposed seafloor spreading
Term
plate tectonics
Definition
theory that crust is broken up into sections that move on mantle
Term
continental collision
Definition
two continental plates coming together (ex. - India and Asia)
Term
subduction
Definition
denser oceanic plate colliding and going underneath less dense continental plate
Term
rift valley
Definition
two continental plates moving apart
Term
seafloor spreading
Definition
two oceanic plates moving apart
Term
convection current
Definition
current in mantle that moves overlying tectonic plates (crust)
Term
divergent boundary
Definition
where two plates pull/move apart (ex. - seafloor spreading, rift valley)
Term
convergent boundary
Definition
where two tectonic plates come together (ex. - subduction, continental collision)
Term
transform boundary
Definition
tectonic plates move sideways past each other
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