Tuesday, October 20, 2009

Answers - Plate Boundaries

1. Divergent, convergent, and transform plate boundaries

2. Divergent means to move away which involves plate movement because the plates pull away from each other. The plates move by magma pushing up from the mantle.

3. Mid-Atlantic Ridge. Iceland sits on it. The triangles are Iceland's active volcano.

4. Convergent means coming together so for plates, they come closer together and one ends up diving under another.

5.
a. Oceanic-continental convergence

b. Oceanic-oceanic convergence

c. Continental-continental convergence

6.
a. Deep sea trenches and volcanic arcs
b. Deep sea trenches and island arcs
c. Very high mountains

7. Transform boundaries is when plates slide horizontally past each other but crust is not produced or destroyed. It causes shallow earthquakes. An example of one is the San Andreas fault in California.

8.
a. Divergent boundary and 2 oceanic plates make it happen.
b. Convergent boundary and also 2 oceanic plates are here.
c. Convergent boundary and also 2 oceanic plates take place here.
d. Divergent boundary and 2 continental plates.
e. Divergent boundary and 2 continental plates.
f. Convergent boundary and the 2 plates are oceanic-continental.
g. Convergent boundary and the 2 plates are oceanic-oceanic.

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