Faults and Plates
Breaks in the earth's surface along which rock can move
Faults
Vibrations of energy that flow from the focus of an earthquake
This is the name for volcanic fog
Vog
A volcano that has erupted in the past, and is expected to erupt again soon
Active
Occurs in places where water is heated by hot magma
Hot Springs
Double Up
The idea that earth's crust is made up of moving plates
Theory of plate tectonics
This detects, times, and measures the movements of the earth
Seismograph
Magma that breaks through the earth's surface
Lava
A volcano that has erupted in the past, but is not expected to erupt again soon.
Dormant
The area in the Pacific Ocean where many volcanoes occur
The Ring of Fire
This occurs when rock faults move apart, forming a gap.
Normal Fault
The point on the earth's surface directly above the focus of an earthquake
Epicenter
Debris Flow
Volcano with a gradually sloping side, and looks like an upside down saucer
Shield Volcano
An earthquake's magnitude is measured with this scale
The Richter Scale
This occurs when rock faults push together, forcing a section of rock upward.
Thrust or Reverse Fault
Slower, destructive waves that occur on the surface of the earth
Surface waves
An avalanche-like emission of red-hot dust and gases from a volcanic eruption
Pyroclastic flow
A large, symmetrical cone-shaped volcano with steep sides.
Composite Cone Volcano
Double Up
The strength of seismic waves is called this
Magnitude
This occurs when rock faults move past each other horizontally
Strike-Slip Fault
Fast moving waves that occur beneath the surface of the earth
Body waves
These are the five main parts of a volcano
Crater, vent, side vent, magma chamber, and the lava
Volcano with a bowl-like crater at the top, that resembles a hill more than a mountain.
Cinder Cone Volcano
These are the five main layers of earth
Crust, Lithosphere, Mantle, Outer Core, Inner Core