| A | B |
|---|
| convergent boundary | plates colliding; coming together |
| divergent boundary | plates dividing; separating |
| transform boundary | plates sliding past each other |
| new crust | formed at divergent boundar |
| old crust | recycled at subduction zone |
| earthquakes | occur at transform boundary |
| mid-ocean ridges | longest continually running mountain range |
| Iceland | growing due to Atlantic mid-ocean ridge |
| continental plate | made of less dense, granitic rock |
| oceanic plate | made of more dense, basaltic rock |
| trench | created at a subduction zone |
