The Theory of Plate Tectonics…

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Plate Tectonics.

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Presentation transcript:

The Theory of Plate Tectonics… …states that the Earth’s lithosphere is divided into tectonic plates that move around on top of the asthenosphere fhttp://www.gweaver.net/techhigh/projects/period1_2/Yellowstone/Plate%20Tectonics.html -

Tectonic Plate Boundaries A place where tectonic plates touch. Three types Transform Divergent Convergent

Types of Plate Boundaries

Convergent Boundary The boundary formed by the collision of two lithospheric plates.

Divergent Boundary The boundary between two tectonic plates that are moving away from each other.

Transform Boundary The boundary between tectonic plates that are sliding past each other horizontally.

Possible causes of plate motion Scientists believe it is convection currents in the mantle that cause the tectonic plates to move.

Possible causes of plate motion, continued… They also believe it is a combination of “Ridge Push” and “Slab Pull”

G. P. S. Global Positioning System Technology that uses a network of satellites to map and locate points on the Earth’s surface Scientist can use GPS to measure the rate at which the plates are moving