Plate Boundaries

1. What are the first 3 types of plate boundaries listed?
-1.Divergent boundaries
-2.Convergent boundaries
-3.Transform boundaries

2. What does the word divergent mean in regard to plate movement? What forces the plates to move apart at divergent boundaries? -Plates movie and new crust is formed. The plates move when magma pushes up the mantle


3. Give an example of a specific mid-ocean ridge where seafloor spreading and divergent boundaries occur. What country sits directly on top of this ridge? What are the red triangles that are shown on the map of this country? Norther American Plate and Eurasian Plate. Iceland sits on top of it. Active Volcano


4. What does the word convergent mean in regard to plate movement? When two plates move together and one sinks under the other.


5. Find the diagrams shown on the website for each of the following kinds of plate boundaries. Label and post the three diagrams on your blog.
a. Oceanic-continental convergence

b. Oceanic-oceanic convergence

c. Continental-continental convergence



6. When one plate gets pushed below another plate it is called subduction. What geologic features form on Earth’s surface directly above the subduction zone in the case of:
a. oceanic-continental convergence? one plate is pushed underneath, deep sea trench forms, island arc forms
b. oceanic-oceanic convergence? oceanic plate is pushed underneath, deep sea trench forms, volcanic arc forms
c. continental-continental convergence? neither plate is pushed underneath, crust deforms and is pushed upward into high mountains



7. What is a transform boundary? What geological disturbance is caused along transform boundaries? Where in North America is there an example of this type of plate boundary?
When plates move along each other. Transform faults or scars on the ocean floor. California


8. Using the Internet and a focused search, identify the type of plate interaction that caused the following features:

a. Mid-Atlantic Ridge -Divergent Boundary

b. Kuril Trench - Convergent Boundary

c. Phillipine Islands - Convergent Boundary

d. East African Rift Valley - Divergent Boundary

e. Red Sea - Divergent Boundary

f. Peru-Chile Trench - Convergent Boundary

g. Aleutian Islands - Convergent Boundary