Plate Tectonics And Earthquakes Flashcards
Liquid layer of earth core
Outer core
Outermost layer of earth
Lithosphere
Fault cause of tension
Normal
Fault cause compression
Reverse
Reverse fault where does the hanging wall move relative to the footwall?
Upward
Normal fault, hang wall move to footwall
Downward
Force to sharp mts
Tension
Area where tectonic plates meet
Boundary
When tectonic plates collide
Convergent
Plates separate
Divergent
Plates slide past
Transform
NOT evidence for continental drift
Oceanic plate theory
1st continent
Pangea
Where does sea floor spreading take place
Mid ocean ridges
Measure movement of tectonic plates
Global Positioning System
Hardens to form new rock at mid ocean ridges
Magma
Measure density of earth layers
Seismograph
Evidence for continental drift
Fossils
Evidence for sea floor spreading
Magnetic reversal
Steppes that squeezes a rock layer
Compression
The raising of rock layer
Uplift
Stress that stretches rock layer
Tension
Sinking rock layer
Subsidence
Most earthquakes occur along edges of
Tectonic plates
What deformation leads to eqs
Elastic deformation
NOT a fault that lead to earthquakes
Abnormal fault
Waves of energy
Seismic waves
The epicenter is
Directly above the focus
Strength of earthquake is determined by
The amount of ground motion
Scale to measure strength of an eq
Ritchie’s magnitude
Intensity determined by
Amount of damage
Measure of How likely an area is to experience an earthquake is
Earthquake hazard level
Forecast earthquakes by observing their past
Strength and frequency
NOT kind of technology to construct eq resistant buildings.
Tectonic plate
When in a car when earthquake begin
Stop car and stay inside
Waves known as secondary or shear
S waves
Begin point of eq
Focus
Branch of science eqs
Seismology
Change in rock repsonded to stress
Deformation
First waves to. Arrive
P waves
Snapping back of deformed rock to its previous shape
Elastic rebound
Tracing of eq motion
Seismogram
Recorder of seismic waves
Seismograph
Shock absorber for seismic waves
Seismogram
Method find eq epicenter
S-p time method
Area where few eqs have happened but will in the future
Seismic gap
Major eq where none occurred recently
Gap hypothesis
Weaker eqs after strong eq
Aftershocks