Vocab
Vocab
Vocab
Vocab
Vocab
100
a force that acts on rock to change its shape or volume
What is stress?
100
this stress pulls on the crust, stretching rock
What is tension?
100
this stress force squeezes rock until it folds or breaks
What is compression?
100
This stress pushes a mass of rock in two opposite directions
What is shearing?
100
shaking and trembling that results from the movement of rock beneath Earth's surface
What is an earthquake?
200
in a fault, the rock that lies below
What is a footwall?
200
in a fault, the rock that lies above
What is a hanging wall?
200
point on the surface directly above the focus is called
What is the epicenter?
200
the record of an earthquake's seismic waves produced by a seismograph
What is a seismogram?
200
these waves compress and expand the ground like an accordion and are the first to arrive
What are P waves
300
tension in the Earth's crust pulls rock apart causing this
What is a normal fault?
300
compression causes this type of fault
What is a reverse fault
300
shearing creates this type of fault
What is strike-slip fault?
300
large area of flat land that elevated high above sea level
What is a plateau?
300
water displaced by the earthquake may for one of these
What is a tsunami?
400
fold in a rock that bends upward into an arch
What is an anticline?
400
fold in a rock that bends downward to form a valley
What is a syncline?
400
Rates earthquakes according the level of damage at a given place
What is the Mercalli Scale?
400
A rating of an earthquake's magnitude based on the size of the earthquake's seismic waves
What is the Richter Scale?
400
a rating system that estimates the total energy released by an earthquake
What is the moment magnitude scale?
500
measures tilting or raising of the ground
What is a tiltmeter?
500
uses a laser beam to detect horizontal fault movements
What is a laser-ranging device?
500
uses a wire stretched across a fault to measure horizontal movement of the ground
What is a creep meter?
500
can monitor changes in elevation as well as horizontal movement along faults using a network of these
What are GPS satellites?
500
the force that opposes that motion of one surface as it moves across another
What is friction
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