Plate Tectonics
State the theory that says earth's crust is made up of moving plates.
Theory of Plate Tectonics?
Breaks in the earth's surface along which rocks can move.
Faults.
State the point on Earth's surface directly above the focus of an earthquake.
Epicenter?
Volcanologists.
Volcanic Fog
Vog.
Crust and uper area of the mantle.
Lithosphere?
Vibrations of energy flowing from the focus.
Seismic Waves.
Magma that breaks the earth's surface.
Lava.
Mud and rock fragments that surge down a mountain when part of it collapses.
Scientist who studies the movement of the earth.
Seismologist.
Reverse or Thrust, Normal, or Strikeslip?
Two main categories of seismic waves.
Body or Surface waves.
Giant ocean wave.
Tsunami?
Area around the Pacific Ocean where volcanoes occur most.
Ring of Fire.
Strength of an earthquake's seismic waves.
Magnitude.
scale that measure the strength (magnitude) of the seismic waves of an earthquake.
Richter Scale
Surface waves include which two slower, more destructive seismic waves?
Love and Rayleigh Waves
Avalanche-like emission of red-hot dust and gases.
Pyroclastic Flow
Water heated by hot magma.
Hot Spring.
Scale that measures the amount of destruction an earthquake causes
Mercalli Scale
Body waves include which two fastest moving seismic waves?
Primary and Secondary Waves.
Which seismic waves are the fastest?
Name three terms that describe how often a volcano erupts.
mixture of cinders, ash, and rock discharged by a volcano.
Tephra.