Plate Tectonics
The process by which magma rises through cracks in mid-ocean ridges and forms new oceanic crust.
What is sea-floor spreading?
Ground movements that occur when blocks of rocks in Earth move suddenly and release energy.
What are earthquakes?
What is a volcano?
The process by which rocks change shape under stress.
What is deformation?
The process by which sections of the lithosphere make large scale movements.
What is plate tectonics?
A place within Earth along a fault at which the first motion of an earthquake occurs.
What is a focus?
Melted rock.
What is magma?
The process by which rock layers bend under stress.
What is folding?
A boundary that forms where two plates collide.
What is a convergent boundary?
A break in Earth's crust along which blocks of rocks move.
What is a fault?
The opening of a volcano
What is a vent?
The stress that pulls rocks apart.
What is tension?
A boundary where two plates separate from each other.
What is a divergent boundary?
The return of rock to its original shape after deformation.
What is deformation?
The resistance of liquid material, such as lava, to flow.
What is viscosity?
Stress that squeezes rocks together.
What is compression?
A boundary that forms where two plates move in horizontal and opposite directions.
The area directly above a focus in the Earth's crust.
What is an epicenter?
A location where an extremely hot mantle rock rises through the asthenosphere.
What is a hot spot?
Stress that pulls rocks in parallel but opposite directions.
What is shear stress?