| A | B |
|---|
| transform fault | a fault that runs across a mid-ocean ridge |
| evidence of continental drift | Continents fitted together perfectly if moved around |
| fossils | the preserved remains or traces of an ancient organism |
| Wegner | First to build detailed scientific case supporting theory of continental drift. |
| lithosphere | the top most solid part of the earth |
| Earth's magnet poles | invisible magnet stripes in ocean rock thatswitch over time |
| fault | a break or crack along which rocks move |
| rift valley | a valley formed when the block of land between 2 normal faults slides downward |
| oceanic crust | the crust beneath the ocean-floor |
| plates | irregularily shpedslabs that make up the earths lithosphere |
| subduction | The process in which crust plunges back into the Earth. |
| trenches | V-shaped valleys that lie along the bottom of the ocean. |
| mid ocean ridges | divergent/constructive boundaries because plates moce apart there |
| divergent/constructive boundaries | where plates move apart, diverge, at mid ocean ridges |
| Convergent/destructive boundaries | trenches where plates come together, converge. |
| Strike-slip/conservative boundaries | Formed by lateral faults grinding together and slip pass each other horizontially. |
| Convection currents | A movement of material caused by difference in temperature that moves the Earth's plates. |
| Island arc | Description for islands that appear in a curved line |
| Mesosaurus | science? Ask Mr. Bohon |
| Pangea | All Earth: single land mass when all continents were together. |
| Destructive boundary | Also know as a convergent boundary of trenches where plates come together. |
| Strike-slip boundary | conservative boundary where lateral faults grind together. |
| Theory of plate tetronics | Theory that links together ideas of continental drift and ocean-floor spreading, explaining how the earth moved over time. |
| Where Islands occur | Volcanoes caused by destructive boundary |
