Vocabulary
The outermost layer of the Earth
crust
The crust that forms the continents
continental crust
Vibrations that travel through Earth
seismic waves
The number of seismographs needed to determine an epicenter
three
The difference in p wave and s wave arrival time
lag time
The hot, flowing, solid layer of Earth between the crust and the core
mantle
The crust that lies under the ocean
oceanic crust
An instrument that detects seismic waves
seismograph
Earthquake waves increase in velocity through what layer?
Mantle
The honey like layer on which the lithosphere rests and moves
asthenosphere
The layer of Earth that includes the crust and upper rigid mantle
lithosphere
This is made up of liquid iron and nickel
outer core
P wave shadow zones occur because:
Their path is bent when traveling through different materials
Oceanic crust is made up of this rock
basalt
Thinner, denser crust
Oceanic
The center of the Earth
core
The largest part of Earth's interior
lower mantle
Seismic waves that move through compression and expansion
P-waves
Continental crust is made up of this rock
granite
Earth's internal heat source
Radioactive decay of elements
The lower part of the upper mantle
asthenosphere
This is made up of solid iron and nickel
inner core
Seismic waves that travel slower and only through solids
S waves
The transfer of heat as material circulates
convection
Where the earthquake actually occurs inside the Earth
Focus