The surfaces rocks move once they break is known as this.
What are faults?
100
A device that measures the seismic waves from earthquakes is known as this.
What is a seismograph?
100
The point on Earth’s surface directly above the earthquake’s focus is known as this.
What is the epicenter?
100
The most destructive type of seismic wave that move rock particles to move in a backward, rolling, side-to-side, and/or swaying motion are known as this.
What are surface waves?
100
13. A type of seismic wave that causes particles in rocks to move at right angles to the direction of wave travel is known as this.
What is a secondary wave (S-wave)?
200
Vibrations produced by the breaking of rock are known as this.
What are earthquakes?
200
Networked seismographs have been useful in determining these two things.
What are the basic structure of Earth and the location of an earthquake’s epicenter?
200
Seismic sea events cause these, which in turn can cause massive damage to coastal areas.
What are tsunamis?
200
Building in loose soils like sand is a bad idea for this reason.
What is the soil can undergo liquefaction relatively easily?
200
A type of seismic wave that causes particles in rocks to move back and forth in the same direction that the wave is traveling is known as this.
What is a primary wave (P-wave)?
300
The three types of forces seen in earthquakes are these.
What are sheer, compression, and tension?
300
The height of the lines traced on the paper of a seismograph that is a measure of the energy released of an earthquake is known as this.
What is magnitude?
300
This earthquake intensity describes the intensity of an earthquake using the amount of structure and geologic damage in a specific location.
What is the Mercalli intensity scale?
300
A term that refers to solids acting like a liquid under specific circumstances is this.
What is liquefaction?
300
The point where energy release first occurs is known as this.
What is focus?
400
The force that pulls things apart is known as this.
What is tension?
400
A magnitude scale commonly used to describe the strength of an earthquake and has no upper limit is known as this.
What is the Richter Magnitude Scale?
400
In an area prone to earthquakes, the lack of an earthquake for a long period of time is indicative of what.
What is that the next earthquake will be very large?
400
In an area prone to earthquakes (but with no nearby volcanoes), the occurrence of many small earthquakes for in relatively short period of time is indicative of what.
What is that the next earthquake will be pretty small?
400
Pulses of force that are generated by an earthquake and travel through the Earth are known as this.
What are seismic waves?
500
The force that squeezes things together is known as this.
What is compression?
500
The force that causes things to slide past one another is known as this.
What is shear?
500
A tension fault in which rocks above the fault surface moves downward in relation to the rock below the surface is known as this.
What is a normal fault?
500
A compression fault in which the rock above the fault surface is forced up and over rock below the fault surface is known as this.
What is a reverse fault?
500
A tension fault in which the rocks on either side of fault surface are moving past each other without much upward or downward movement is known as this.