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Plate Tectonics

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by

Nattalie Waddell

on 27 January 2015

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Transcript of Plate Tectonics

Historical Data!
Plate tectonic theory had its beginnings in 1915 when Alfred Wegener proposed his theory of "continental drift."
Plate Boundaries
Convection Currents
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.

Resulting Features
Modern Data
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.
Plate Tectonics
The 3 main types of plate boundaries:
-Divergent Boundary
-Convergent Boundary
-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.
Sites:
http://www.iris.edu/hq/files/programs/education_and_outreach/aotm/14/1.GPS_Background.pdF


Some are moving toward each other, some are moving apart, and some are even sliding past eachother!

http://www.learner.org/interactives/dynamicearth/plate.html

What happend after "the disasaster"
Divergent Boundary:
Volcanos are very common with a, Divergent Boundary.
Volcanic
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
Convergent boundary:
A
trench
is very common with a Convergent Boundary. One plate made of oceanic crust can slide
underneight
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!
Transform Boundary:
When the two plates rub against each other
huge stresses can cuse the rock to
break
. That results in and
earthquakes
. The places were the breaks occur are calles
fualts.
http://pubs.usgs.gov/gip/dynamic/unanswered.html
http://www.scec.org/education/k12/learn/plate2.htm
Full transcript