Seismic Waves and Earth's Interior
sensitive instruments
Although most of these can't be felt great distances from the epicenter, they can be detected and recorded by_______
seismic waves
Most of the knowledge of Earth's interior comes from the study of______ which change speed and directions when they encounter different materials
internal structure
The travel times and behavior of seismic waves provide a detailed picture of Earth's________
paper computer
These tools use the vibrations to record movement on______ and then directly record it onto a_________
bent
This happens because the P-wave is______ when changing between solid and liquid
the region between two distances that doesn't receive direct P waves
What are P-Wave Shadow Zones
the region where no S-Waves can be detected
What are S-Wave shadow zones?
seismographs or seismometers
What are the instruments that are used
P-Wave and S-Wave Shadow zone
What are the two different shadow zones
seismograph
What is the record produced by a seismometer called?
vibrations
______ sent out by earthquakes shake the entire globe
igneous rock
By studying wave times, scientist have found that the lithosphere (crust and upper mantle) is made primarily of_______
solids liquid
Due to the fact that S-waves only travel through______, this Happens. The distance of S waves has allowed scientist to reason that the Earth's outer core must be_______
shadow zones
Due to the fact that the waves change speed and direction,______ are created
dense iron and nickel
Seismic waves traveling through the inner part of the planet indicates it is very_____ and made of______ and________
Seismology
the study of seismic waves and earthquakes