Vocabulary
Vocabulary
Forces Inside of Earth's Crust
Earthquakes And Seismic Waves
Monitoring Earthquakes
100
Stress that stretches rock so that it becomes thinner in the middle.
What is tension.
100
A type of fault where the hanging wall slides downward; caused by tension in the crust.
What is a normal fault.
100
Work over millions of years to change the shape and volume of rock. (Three things)
What is tension, compression, and shearing.
100
Carry energy produced by an earthquake
What is seismic waves
100
Cause a simple seismograph's drum to vibrate, which in turn causes the pen to record the drums vibrations.
What is seismic waves.
200
A type of fault where the hanging wall slides upward; caused by compression in the crust.
What is a reverse fault.
200
A force that acts on rock to change its shape or volume.
What is stress.
200
Created when enough stress builds up in rock and the rock breaks
What is a fault
200
Geologists use seismic waves to locate this.
What is an earthquake's epicenter.
200
Type of seismic wave that produces the largest ground movement.
What is surface waves.
300
A large landform that has high elevation and a more or less level surface.
What is a plateau.
300
Stress that pushes masses of rock in opposite directions, in a sideways movement.
What is shearing.
300
Can change a flat plane into features such as folds, folded-mountains, fault-block mountains and plateaus.
What is plate movement
300
Scientists use to measure an earthquake's magnitude or size.
What is the Richter Scale or the Moment Magnitude Scale.
300
In the U.S. two plates meet along this coast in California, Washington State and Alaska.
What is the Pacific coast.
400
Stress that squeezes rock until it folds or breaks.
What is compression.
400
A type of fault in which rocks on either side move past each other sideways with little up or down motion.
What is a strike-slip fault.
400
Upward and downward folds in a rock, Appalachian Mountains in Pennsylvania are folded-mountains made up of these.
What is anticlines and synclines.
400
The amount of earthquake damage or shaking that is felt is measured using this.
What is Modified Mercalli Scale
400
A smaller earthquake that occurs after a larger earthquake.
What is an aftershock.
500
The point beneath Earth’s surface where rock first breaks under stress and causes an earthquake.
What is the focus.
500
The point on Earth’s surface directly above an earthquake’s focus.
What is the epicenter.
500
Type of reverse fault that allows the hanging wall to be pushed great distances.
What is a thrust fault.
500
Most earthquakes start here.
What is the lithosphere
500
The vast area of geological activity where many of the world's earthquakes occur.
What is the Ring Of Fire.
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