Chapter 8-Earth Dynamics Flashcards
ISOSTASY
Equilibrium between continental crust and mantle below it.
SUBSIDENCE
The downward vertical motion of earth’s motion.
UPLIFT
Upward vertical motion of earth’s surface.
COMPRESSION
Squeezing stress.
TENSION
Stress that pulls something apart.
SHEAR
Parallel forces acting in opposite directions.
STRAIN
A change in the shape of rock caused by stress.
OCEAN TRENCH
Deep, underwater troughs created by one plate subducting under another plate at a convergent plate boundary.
VOLCANIC ARC
A curved line of volcanoes that forms parallel to a plate boundary.
TRANSFORM FAULT
When tectonic plates slide horizontally past each other.
FAULT ZONE
An area of many fractured pieces of crust along a large fault.
FOLDED MOUNTAINS
Are made of layers of rocks that are folded.
FAULT BLOCK MOUNTAINS
Parallel ridges that form where blocks of crust move up or down along faults.
UPLIFTED MOUNTAINS
When large regions rise vertically with very little deformation.
PLAINS
Extensive area of level or rolling land.
