Pointers to Review PDF

Pointers to Review Plate Boundary: - Divergent Boundary - Convergent Boundary - Transform Boundary Mechanism (Cause the Plate Movement) Evidence of Plate Movement Convergent Boundary A continental crust curves upward on top of the oceanic crust due to its lesser density. The oceanic...

Pointers to Review Plate Boundary: - Divergent Boundary - Convergent Boundary - Transform Boundary Mechanism (Cause the Plate Movement) Evidence of Plate Movement Convergent Boundary A continental crust curves upward on top of the oceanic crust due to its lesser density. The oceanic crust, due to its greater density, stays below. When an oceanic crust converges with a continental crust, a crack between the crusts underwater,called trench, is formed. Oceanic crust has greater mass, its density is also greater. Subduction is the process by which a plate dives under a less dense plate. When there is volcanic activity such as an eruption, the ground moves, and so an earthquake is felt. Because subduction continues, a group of volcanoes, called volcanic arc, is formed at the surface of the continental crust along the boundary where the two crust converged. Divergent Boundary Transform Boundary 1. Divergent boundary a. Continental-Continental - Rift valley b. Oceanic-oceanic - Mid-ocean ridges - seafloor spreading 2. Convergent Boundary  a. Continental-oceanic - continental volcanic arc - subduction zone b. Oceanic-oceanic - Volcanic Island Arc - subduction zone c. Continental-continental - Mountain Ranges 3. Transform boundary a. Faults- more earthquake Mechanism (causes the Plate to Move) Evidence of Plate Movement