| A | B |
|---|
| geology | the study of the earth's physical structure and history |
| crust | the solid, rocky, surface layer of the earth |
| % of water on earth | opp |
| island | opp |
| isthmus | a narrow strip of land having water on each side and joining two larger bodies of land |
| delta | opp |
| lake | opp |
| magma | opp |
| faults | a fracture, or break, in the earth's crust |
| continential drift theory | the idea that continentsslowly shift their positions due to movement of the tectonic plates on which they ride |
| convection | opp |
| converging | opp |
| core | the earth's center, consisting of very hot metal that is dense and solid in the inner core and molten, or liquid,in the outer core |
| continents | any of the seven large landmasses of the earth's surface |
| 4 major types of landforms | opp |
| archipelago | a group of islands |
| peninsula | a strip of land that juts out into an ocean |
| gulf | opp |
| butte | opp |
| lava | magma, or molten rock from the earth's mantle, the breaks through the surface of the earth during volcanic activity |
| plate tectonics | the theory that the earth's outer shell is composed of a number of large, unanchored plates, or slabs of rock, whose constant movement explains earthquakes and volcanic activity |
| sea floor spreading | oop |
| spreading | oop |
| faulting | oop |
| mantle | a thick layer of mostly solid rock beneath the earth's crust that surrounds the earth's core |
| relief | the differences in elevation, or height, of the landforms in any particular area |
| strait | oop |
| volcano | oop |
| sound | oop |
| canyon | oop |
| volcanism | oop |
| fold | a bend or buckle in the earth's crust |
| pangea | oop |
| rift valley | a large split along the crest of an underwater mountain system where small earthquakes nand volcanic eruptions frequently occur |
| subduction | oop |
| ring of fire | a ring of volcanis mountains surrounding the rim of the Pacific Ocean |
