This type of rock is more likely to contain fossils.
What is sedimentary rock?
This type of plate boundary causes the formation of the mid-ocean ridges.
What is a divergent boundary?
This must happen for lava to transform into igneous rock.
What is cooling?
This is the cause of oceanic plates subducting beneath continental plates at convergent boundaries.
What is the relative density of basaltic oceanic crust compared to continental granitic crust
This is a name given for the region shaded in red due to its many earthquakes and volcanoes.

What is the Ring of Fire?
All of these events are preceded or characterized by seismic events.
Unlike the piedmont or blue ridge regions, the outer banks of North Carolina (located within the coastal plains region) can change dramatically within the span of human lifetime. This is the cause of such changes.
What is ocean water?
Because sediment is deposited in horizontal layers, rock age ______ (increases/decreases) as depth of rock increases.
What is increases?
What is a convergent boundary (continental-continental)?
This is a step in the process by which an earthquake's epicenter may be determined.
What is plotting a circle around each of (at least) 3 seismograph stations with a radius equal to the distance of each station from the epicenter?
This type of plate boundary is most likely to produce a volcano. 
What is a convergent boundary?
These are the three geographic regions of North Carolina.
What is Blue Ridge, Piedmont, and Coastal Plains?
These are the three types of particles that are used to classify soil types.
sand, silt and clay.
The Eyjafjallajkull volcano in Iceland sits on top of this type of plate boundary.
What is a divergent boundary?
The roots of trees and other vegetation on hillsides hold soil in place. This mass movement might result from clearcutting forests on hillsides.
What is a landslide?

Frost wedging is classified under this type of weathering.
What is mechanical weathering?
This is the deadliest natural disaster in the US.
Flash floods