Boundaries
There are three boundaries.
How many plate boundaries are there?
Ground movements that occur when blocks of rock in Earth move/release energy.
What is an earthquake?
A process by which rocks change shape when under stress.
What is deformation?
Any place where gas, ash, or melted rock erupts from ground.
What is a volcano?
500,000 earthquakes.
How many earthquakes occur around the world every year?
A boundary where 2 or more tectonic plates meet.
What is a tectonic plate boundary?
a place within Earth, along a fault. It is where an earthquake´s first motion is.
What is the/a focus?
Stress pushing rocks in different directions but parallel.
What is shear stress?
A volcano that hasn´t erupted in a long time.
What is a dormant volcano?
A place where there are multiple explosive volcanoes that form on convergent boundaries in the Pacific Ocean
What is the Ring of Fire?
Plates moved towards eachother and rock is squeezed at this kind of boundary.
What is a convergent boundary?
An area directly above the focus, on Earth´s surface.
What is the epicenter?
A process that occurs when rock layers bend under stress.
What is folding?
A volcano with a broad base and gently sloping sides.
What is a shield volcano?
These faults form when a rock is under tension.
What is a normal fault?
A boundary where two plates move past eachother horizontally.
What is a transform boundary?
A break in Earth´s crust along which blocks of rock move.
What is a fault?
The amount of force per unit area that´s placed on an object.
What is stress?
A column of hot mantle rock.
What is a mantle plume?
The youngest rock layers at a fold´s core.
What is a syncline?
Mid-ocean ridges are formed at this kind of boundary.
What is a divergent boundary?
These types of earthquakes are 700 kilometers deep.
What are subduction zone earthquakes?
Stress that stretches or pulls rocks apart.
What is tension?
A thick, flat layer of cooled lava.
What is a lava plateau?
An Alaskan earthquake in 1964.
What was the largest earthquake in the U.S.?