So Stressful
Stressin' Me Out
Catch a Wave
Scales
Measure me!
100
The point beneath Earth's surface, where rock under stress breaks to cause an earthquake.
What is the focus?
100
Any change in the volume or shape of Earth's crust.
What is deformation?
100
These seismic waves arrive last, but produce the most severe ground movements.
What are surface waves?
100
This scale estimates the total energy released by an earthquake.
What is the Moment Magnitude Scale?
100
This machine allows geologists to measure the amount that a fault has moved.
What is a creep meter?
200
The stress force that pulls on the crust and stretches rock.
What is tension?
200
The fault shearing creates.
What is a strike-slip fault?
200
These seismic waves compress and expand the ground like an accordion; traveling through both liquids and solids.
What are P Waves?
200
This machine records the ground movements caused by seismic waves as they move through the Earth.
What is a seismograph?
200
A large area of flat land that is elevated high above sea level?
What is a plateau?
300
The type of stress that produces a strike-slip fault.
What is shearing?
300
The fault tension causes.
What is a normal fault?
300
They carry the energy of an earthquake away from the focus, through the Earth's interior and across the surface.
What are seismic waves?
300
This scale rates earthquakes according to their intensity.
What is the Mercalli scale?
300
This machine measures tilting of the ground.
What is a tiltmeter?
400
This is a force that acts on rock to change its shape or volume.
What is stress?
400
Compression produces this fault.
What is a reverse fault?
400
These seismic waves vibrate from side to side as well as up and down; they cannot move through liquids.
What are S Waves?
400
This scale is a rating of the size of seismic waves; can only provide accurate measurements for small, nearby earthquakes.
What is the Richter scale?
400
An earthquake that occurs after a larger earthquake in the same area.
What is an aftershock?
500
The stress force that pushes on rock in two opposite directions.
What is shearing?
500
Anticlines and synclines are two types of this.
What are folds?
500
The point beneath Earth's surface where the crust breaks and triggers an earthquake.
What is the focus?
500
A tsunami is defined as this:
What is produced when water is displaced by an undersea earthquake?
500
Liquefaction is defined as this:
What is the process that occurs when an earthquake's shaking turns loose soil into mud.
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