Unit 2 Chapter 2 Flashcards
When rocks break this occurs.
An earthquake
The force that is used when rocks slide past each other
Shear force
This is the point on the earth’s surface directly above where the earthquake originated.
The epicenter
This is the type of fault that occurs due to compression force
A reverse fault
When a rock or plate is stretched to its breaking point we call this what?
The elastic limit
When an earthquake occurs there often several seismic activities. When there is a period of time between seismic activities we called this what?
Seismic gaps
At a normal fault the plate is pulled apart and the football stays while the hanging wall falls or is moved down in relation to it. What force causes these plates to move?
Tension force
At a transform boundary, two tectonic plates slide past each other horizontally. The force that causes these plates to move is called what?
Shear force
This is the point with in the earth where and earthquake begins.
The focus
These waves only travel along the surface of the earth and are the most destructive ways.
Surface waves
These seismic waves are the fastest waves.
P waves
An S wave stands for a _______wave
Secondary wave
An instrument used by seismologists to measure seismic activity is called what?
A seismograph
More destructive earthquakes occur at which zone? A divergent soon? Or a convergence zone
A convergent zone
This fault is caused by shearing force.
A strike slip fault
This is a word that refers to the amount of destruction that occurs at an earthquake; it also shows how powerful and strong and earthquake is.
Magnitude
This is a word that is based on eyewitness observations and shows how much damage takes place on buildings when in earthquake occurs.
Intensity
When poor spaces collapse with in the soil and makes it become more like a liquid during an earthquake we call this what?
Liquefaction
This fault is caused by compression forces
A reverse fault
These occur after an earthquake and are often as strong as the original earthquake.
Aftershocks
A P wave stands for what?
Primary wave
This type of wave will stop when it hits liquid.
Secondary seismic wave
This is a boundary where the two plates pull apart from each other.
Divergent plate boundary
At this boundary, plates are pushed together.
Convergent plate boundary
This force pushes plates together.
Compression force
