Plate Tectonics and Earthquakes. Objectives: Students will learn key terms associated with plate tectonic processes. (Part A) Students will understand the specific plate motions associated with divergent, convergent, and transform plate boundaries. (Part B)
Asthenosphere (upper mantle)
Divergent Boundary – plates move AWAY from each other
Convergent Boundary – plates move TOWARD each other
Transform Boundary – plates SLIDE past each other
ocean plate divergence
What could Wegener have told the geological society?
Only a Model – Think Convection
Convection – heat transfer through a liquid or gas that
results in circular movement of particles
Cooler water sinks
Hot water rises
The Earth’s Mantle
Can you see the convection?
Mantle operates like a “lava lamp,” producing
swelling and shrinking of magma plumes.
Los Angeles, Ca 350 N-lat, 1210 W-long
Spokane, Wa 470 N-lat, 1180 W-long
New York, NY 420 N-lat, 750 W-long
52 N-lat, 78 E long
15 N-lat, -132 W-long
-25 S-lat, 136 E long
-18 S-lat, -162 W-long
-55 S-lat, -15 W-long