| A | B |
|---|
| geologists | earth scientists |
| rock | forms earth's surface |
| geology | study of earth |
| constructive forces | forces that build up formations |
| destructive forces | forces that wear down formations |
| continents | great land masses on earth |
| seismic waves | waves created by earthquakes |
| pressure | force pushing on a surface |
| crust | layer of rock that forms earth's outer skin |
| basalt | dark, dense rock with fine texture |
| granite | rock with large crystals, light color |
| mantle | solid layer of hot rock |
| lithosphere | uppermost part of mantle |
| asthenosphere | soft layer of mantle |
| outer core | layer of molten metal that surrounds the inner core |
| inner core | dense ball of solid metal, earth's center |
| magnetic field | caused by spinning of inner core |
