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Transcript of Plate Tectonics
Plate tectonic theory had its beginnings in 1915 when Alfred Wegener proposed his theory of "continental drift."
The marble rock beneath the rigid plates is believed to be moving in a circular manner some what like a pot of thick soup when heated to boiling
Plate Boundary Identifcation
The border between 2 tectonic plates is called a boundary.
The plate tectonic theory is a theory that Earth's outer shell is divided into several plates that glide over the mantle which is the rocky inner layer above the core.
Scientists have a pretty good understanding on how the plates move, and how such movements relate to earthquakes and volcano activity.
The Global Positioning System (GPS) has been the most useful for studying the Earth's plate's movement.
The 3 main types of plate boundaries:
-Transform Plate Boundary
A Divergent boundary happens when 2 tectonic plates move away from each other.
A Convergent happens when the two plates come together .
Transform Boundary happens when two plates slide past each other.
Some are moving toward each other, some are moving apart, and some are even sliding past eachother!
What happend after "the disasaster"
Volcanos are very common with a, Divergent Boundary.
activity is common in these areas because the mantle easily moves to the surface through the fractured rock. Magma is constantly streaming to the surface.
BY: Hannah, Kristen, Nattalie
is very common with a Convergent Boundary. One plate made of oceanic crust can slide
another plate. That can form a narrow, deep trench.
The Marina Trench
is the deepest tench in the world. You could actually take Mount Everest and sink it in the Marina trench, with about a mile untill you reach the surface!
When the two plates rub against each other
huge stresses can cuse the rock to
. That results in and
. The places were the breaks occur are calles