| A | B |
|---|
| Geology | the study of teh earth's physical structure and history |
| core | center of the earth |
| mantle | thick layer of rock around the core |
| magma | melted rock |
| crust | rocky surface layer |
| fault | a break in the earth's crust |
| plate tectonic | the theory that the earth's outer shell is composed of a number of large, unanchored plates |
| lithosphere | the earth's crust and the brittle upper layer of teh mantle |
| continental drift theory | The idea that continents slowly shift their positions due to movements of the tectonic plates |
| fossils | the preserved remains or traces of ancient animals and plants |
