GL 107 Earth Systems Science

K. Hannula

Discussion questions for 9/10/07

1.  Define:

• divergent plate boundary

• mid-ocean ridge

• convergent plate boundary

• subduction zone

• volcanic arc

• transform plate boundary

2.  Describe the motion that occurs at each type of plate boundary (divergent, convergent, and transform).

3.  How are the crust, the mantle, and the core different from one another:

• rock type?
• chemical composition?
• location in earth?

4.  How are continental and oceanic  crust different from one another:

• thickness?
• rock type?

5.  How are lithosphere and asthenosphere different from one another:

• rigidity of material?
• where are they found?
• role in plate tectonics?

6.  How are the lithosphere and asthenosphere related to the crust and the mantle?