| 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 | More than 70% |
| Island | A piece of land surrounded by water on all sides |
| Isthmus | A narrow strip of land having water on each side and joining two larger bodies of land |
| Delta | The beginning of a river |
| Lake | A body of water surrounded on all sides by land |
| Magama | Molten rock inside the earth |
| faults | Breaks in the earth's crust |
| Continental Drift Theory | There used to be just one huge continent |
| Convection | A circular movement caused when material is heated |
| Converging | When two of the same plates meet |
| Core | center of the earth |
| Continents | Large landmasses in the ocean |
