1. Plate Tectonics
Carrie Armstrong, Erin Rickert, Lydia Nguyen, Emmy Penquite

2. Alfred Wegener German Scientist
First to actively pursue the idea of a super-continent
Also came up with the theory of continental drift
Alfred Wegener

3. How he got started:
The first clue Wegener had was the matching coast lines
he said they were almost like pieces of a jigsaw puzzle
Then noticed that other continents seemed to fit together to

5. Plate Tectonics

7. Includes the crust and the mantle
Lithosphere
outer part of the Earth
Includes the crust and the mantle
about 100 km thick
lithosphere

8. The ductile part of the earth just below the lithosphere
Asthenosphere
The ductile part of the earth just below the lithosphere
Includes the lower mantle
Referred to as hot plastic
About 180 km thick
asthenosphere

9. Movement resembles ice drifting across a pond
Tectonic Plates
The tectonic plates glide over the asthenosphere at relates ranging from 1-16cm per year
Movement resembles ice drifting across a pond

10. Continental Drift link
The continents and ocean basins make up the upper parts of the plates
As the plates glide the ocean and continents move with it
link

11. Geological activity Most of this activity occurs at plate boundaries
Three types of plate boundaries exist
1. divergent
2. convergent
3. transform