| A | B |
|---|
| plate | large chunk of the solid outer part of earth |
| lithosphere | crust and solid, upper mantle |
| 7 | number of major plates |
| divergent | mid-ocean ridge plate boundary |
| convergent | trench type plate boundary |
| constructive | another name for divergent plate boundary |
| destructive | another name for a convergent plate boundary |
| plate tectonics | Key theory of geology |
| plate tectonics | theory that includes continental drift |
| plate tectonics | explains earthquakes and volcanoes |
| convection currents | movement of material in mantle that moves plates |
| tension | type of stress at divergent plate boundary |
| compression | type of stress at convergent plate boundary |
| subduction | process at trenches |
| neutral | plate boundary caused by shearing stress |
| wind | convection currents in the air |
| geophysicists | geologists who study processes changing the earth |
| mountains | collision of two continental plates |
| island arc | string of islands made by converging ocean plates |
| trench | made by converging ocean and continental plates |
