Vocabulary 1
Graphical illustration of earthquake waves
seismogram
The point in Earth's interior where the energy release of an earthquake occurs
epicenter
Type of fault where two blocks of rock slide horizontally past each other
Strike-slip
The resistance of magma or lava to flow
viscosity
Do seismic waves increase or decrease in energy and intensity as they travel away from the focus?
decrease
Instrument that records seismic activity
seismometer
List the four types of volcanoes
Strata/composite, cinder cone, super, shield
Type of fault where forces push two blocks of rock together
Reverse
Global temperature increase
The most destructive seismic waves
surface waves
Vibrations in the ground that result from faults
earthquake
Used to describe the amount of energy an earthquake releases
Moment Magnitude Scale
Type of fault where forces pull two blocks of rock apart
normal
Complete this sentence: A low silica content in magma leads to __________________
low viscosity/faster rate of flow
The first waves to reach a seismograph after an earthquake
primary or P-waves
Method scientists use to locate the epicenter of an earthquake
triangulation
Scale that measures an earthquake's intensity based on its effect on people and structures
Modified Mercalli Scale
A normal fault occurs at which plate boundary? (Why?)
Divergent (because this is where plates are moving apart)
Often forms when layers of lava & volcanic as erupt and build up
volcano
The fastest seismic wave
primary or P-waves
Breaks in Earth's lithosphere
fault
The point of Earth's surface that is directly above an earthquake's focus
epicenter
Which movement of two blocks along a fault causes an earthquake to occur?
Trick question - sliding past, moving toward or pulling away from each other
What determines whether a volcanic eruption will be quiet or explosive
amount of water vapor & other gases trapped in the magma
This wave travels only through solids
S wave