| A | B |
| shearing | the type of stress produced by two tectonic plates sliding past each other horizontally |
| continental drift | the theory that continents can move apart from each other and have done so in the past |
| orogenesis | the process of mountain formation |
| compressional | the type of stress produced by two tectonic plates coming together |
| faulting | the breaking of the earth’s crust and the sliding of the crust along the break |
| footwall | the land mass below a fault |
| subduction | the process of one tectonic plate being pushed under another tectonic plate |
| plate boundary | the point at which one tectonic plate meets another |
| oceanic ridge | a mountain chain that forms on the ocean floor where tectonic plates pull apart |
| divergent boundary | Plates moving away from each other |
| transform boundary | Two tectonic plates are sliding past each other. |
| convergent boundary | Two plates moving toward each other |
| trench | A deep underwater valley |