What and why?
Waves
Earth's Interior
Plate Tectonics
Fault Zones
100
Movements of the ground caused by a sudden release of energy when rocks along a fault move
What is an earthquake
100
As rocks along a fault slip into new positions, the rocks release energy in the form of vibrations called this
What is seismic waves
100
In 1909, it was discovered that the speed of seismic waves increases abruptly this far beneath the surface of continents
What is 30 km
100
These can occur between two oceanic plates or between one oceanic plate and one continental plate
What is convergent oceanic environments
100
Regions of numerous, closely spaced faults
What is fault zones
200
The sudden return of elastically deformed rock to its undeformed shape
What is Elastic Rebound
200
This is the amount of wave types that earthquakes generally produce
What is two
200
The location at which the speed of the waves increases marks the boundary between the crust and what?
What is the mantle
200
This spreading motion causes earthquakes along the ocean ridges
What is divergent oceanic environments
200
Fault zones form here because of the intense stress that results when they separate, collide, subduct, or slide past each other
What is plate boundaries
300
A fault in its immobile state
What is locked
300
Waves that travel through the body of a medium
What are body waves
300
The three main compositional layers of Earth are the crust, the mantle and what?
What is the core
300
This stress may cause mountains to form and cause frequent earthquakes
What is continental environments
300
The fault zone that extends almost the entire length of the country of Turkey
What is the North Anatolian fault zone
400
A break in a body of rock along which one block slides relative to another
What is a fault
400
Waves that travel along the surface of a body rather than through the middle
What are surface waves
400
The lithosphere, asthenosphere, mesosphere, the outer core and inner core are considered to be what kind of layers
What is mechanical
400
Earthquakes occur along mid-ocean ridges because this is pulling away from both sides of each ridge
What is oceanic lithosphere
400
The most widely felt series of earthquakes in the history of the US did not occur near an active boundary, instead they were near which state.
What is Missouri
500
The location within Earth along a fault at which the first motion of an earthquake occurs
What is the focus
500
The fastest seismic waves that are always detected first
What are P waves
500
Locations on Earth's surface where no body waves from a particular earthquake can be detected
What is shadow zones
500
Most earthquakes occur in how many main tectonic environments
What is three
500
It was not until this time that studies of the Mississippi River region revealed an ancient fault zone deep within Earth's crust
What is the late 1970s.
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