1. Falcon Focus Rank the four main layers of the earth from least dense to most dense. What causes the plate tectonics to move?

6. Earthquake Map

7. Divergent Boundary Where two plates are moving apart Land feature formed: mid-ocean ridges (by sea - floor spreading) Rift occurs when two continental plates pull apart New crust forms because magma pushes up and hardens between separating plates. Creates new crust.

12. Convergent Boundary - Oceanic and Oceanic Collide (O-O) When Two Oceanic plates collide. Creates Subduction Zone and Volcanic Arc - Destroys some crust

13. Convergent Boundary - Continental and Oceanic Collide (C-O) An Oceanic and Continental Plate Collide Creates Subduction Zone - Destroys some crust

14. Convergent Boundary - Continental and Continental Collide (C-C) Two plates come together and collide Creates Folded Mountains

18. Transform Fault Boundary Where two plates slide past each other. Crust is neither created nor destroyed Earthquakes occur frequently along this type of boundary.

21. Examples: The San Andreas Fault is a transform fault boundary and has been the site of many earthquakes.