Vocabulary
Shaking that results from the movement of rock underground.
What is an earthquake?
The theory that earth's plates are in slow, constant motion moved by convection currents in the mantle.
What is plate tectonics?
The point underground where an earthquake starts.
What is the focus?
A belt of volcanoes that rim the Pacific Ocean.
What is the Ring of Fire?
The top layer of the earth.
What is the crust?
A crack in the earth's crust
Transform, divergent, convergent.
What are the three types of plate boundaries?
What is magnitude?
What is a volcano?
The innermost part of the innermost layer of the earth.
What is the inner core?
A tool used to measure the size of seismic waves.
What is a seismograph?
The process by which a plate sinks back into mantle at a deep-ocean trench.
What is subduction?
The hanging wall moves in this direction at a reverse fault.
What is up?
Most volcanoes form at these.
What are plate boundaries?
What is the asthenosphere?
A vibration that carries the energy from an earthquake.
What are seismic waves?
Caused by heat and density, these cause earth's plates to move around the earth.
What are convection currents?
This damaging effect of an earthquake forms only when you get close to the shore.
What is a tsunami?
Volcanoes that form because of these can form anywhere, even in the middle of a plate.
What are hot spots?
What is a pipe?
What is liquefaction?
Sea-floor spreading occurs here.
What is a mid-ocean ridge?
Earthquakes are most common at transform boundaries, and are caused by this kind of stress.
Magma rises to the surface after it forms in the mantle because of this property.
What is density?
The opening in a volcano from which magma erupts.