| A | B |
|---|
| Convergent Boundary: When two ocean plates collide, one plate bends and slides under other they form | island arc of volcanoes |
| Convergent Boundary: continental plate and continental plate collide, no subduction, both are less dense than athenosphere, plates collide and crumble up and they form | earthquakes, mountains like Himalyas |
| Lithosphere | the crust and upper part of mantle |
| athenosphere | plastic like layer below lithosphere |
| evidence for continental drift | fossils of animals and rock layers |
| developed idea of sea floor spreading | Harry Hess |
| developed idea for Pangaea | Wegener |
| process where less dense material below earth’s crust is forced upward toward the surface at mid-ocean ridge | sea floor spreading |
