| A | B |
|---|
| destructive force | the slow wearing away of the lithosphere |
| sea-floor spreading | a divergent boundary where ocean crust is created |
| divergent boundary | term given to tectonic plates that move apart |
| convergent boundary | term give to tectonic plates that move toward each other |
| rock | solid part of the lithosphere |
| continental drift | theory proposed by Alfred Wegener |
| inner core | solid layer of the earth that contains iron and nickel |
| bounday | a break in Earth's crust where lithosphere ha slipped side b side past each other |
