- See if you can identify today's continents within Pangaea
Sea-Floor Spreading - Lesson 2
Plate Tectonics - Lesson 3
Plate tectonic map - Map that shows the various types of zones and boundaries associated with plate tectonics.
Plate Boundaries 
Almost all the Earth's new crust forms at divergent boundaries, but most are not well known because they lie deep beneath the oceans. These are zones where two plates move away from each other, allowing magma from the mantle to rise up and solidify as new crust.
This image shows a slice through the Earth at a convergent plate boundary. This view illustrates just one of the ways that plates behave when they collide. In this case, one plate is pulled beneath another (subduction), forming a deep trench. The long, narrow zone where the two plates meet is called a subduction zone.