| A | B |
|---|
| Coastal Plain | flattest area underlain by sediments |
| Piedmont | largest section, separated by a fall line from the Coastal Plain |
| Blue-Ridge | the oldest in the state |
| Valley and Ridge | karst topography and cavern are abundant here |
| Appalachian Plateau | Coal are found here |
| Coal | Most abundant natural resource in VA |
| Earth | has a solid inner core, liquid outer core, plastic-like mantle and a thin rocky crust |
| Oceanic crust is made of | basalt |
| Continental crust is made of | granite |
| Convection currents | move tectonic plates |
| Convergent Boundaries | are colliding plates which cause mountains |
| Divergent boundaries | are dividing plates |
| Transform boundaries | slide past each other and earthquakes are produced |
| earthquakes | can result with any plate |
| To find the epicenter of an earthquake | 3 seismic stations are needed |
| P waves | travel the fastest and reach seismic stations first |
| S waves | travel slower and do not travel through liquids |
| Karst topography | developed in areas underlain by sedimentary rocks |
