1. The Theory of Plate Tectonics…
…states that the Earth’s lithosphere is divided into tectonic plates that move around on top of the asthenosphere
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2. Tectonic Plate Boundaries
A place where tectonic plates touch.
Three types
Transform Divergent Convergent

3. Types of Plate Boundaries

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

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

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

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

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

9. 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