 | Term | Definition |
| |
fossils |
presurved remains or trace of an ancient orginism |
| |
pangaea |
the single giant landmass that existed more than 200 million years ago |
| |
theory of tectonics |
the theory of continental drift that links together the ideas of continental drift and ocean floor spreading and explains how the earth has changed over time |
| |
mid ocean ridge |
a chain of undersea mountains |
| |
ocean floor spreading |
when the harden lava is formed into new ocean floor |
| |
transform fault |
the fault that runs throught the mid ocean ridge |
| |
trenches |
V-shaped valley that lies along the bottom of the ocean |
| |
subduction |
when the crust pluges into the interior of the earth |
| |
theory of continental drift |
the theory that the continents were onces joined |
| |
plate |
irregular slabs that fit together |
| |
tectonics |
gology that deals with the shape of the earths crust |
| |
lithosphere |
the top most part of the earth |
| |
divergan boundary (convergent boundary) |
plates move apart at the midocean ridge |
| |
converjent boundaries (Destructive boundaries) |
when trenches come together |
| |
strike slip boundaries |
boundaries that form laterals fault |
| |
convection currents |
the movement of materials caused diffrence in temp. |
