| A | B |
|---|
| geologist | scientists who study the forces that make and shape planet Earth |
| rock | material that forms Earth's hard surface |
| geology | the study of planet Earth |
| constructive forces | these shape the surface by building up mountains and landmasses |
| destructive forces | these slowly war away mountains and, eventually, every other feature on the surface |
| continents | 7 great landmasses |
| seismic waves | used to study the Earth's interior |
| 3 main layers of the Earth's interior | crust, mantle, and the core |
| crust | layer of rock that forms Earth's outer skin |
| basalt | dark dense rock that forms most of the oceanic crust |
| granite | light colored NON-dense rock that forms most of the continental crust |
| mantle | layer right below the crust that is hot rock |
| lithosphere | the uppermost part of the mantle and the crust |
| asthenosphere | soft layer of the mantle the has great heat and pressure |
| outer core | a layer of molten metal that surrounds the inner core |
| inner core | a dense ball of solid metal |
