Earth Science: Geology, the Environment, and the Universe

Section 2: Seismic Waves and Earth's Interior

Seismic Waves and Earth's Interior

1
What is the crustal part of the lithosphere primarily composed of?
A)igneous rocks
B)simple oxides
C)peridotite
D)iron and nickel
2
Use the graph to determine how long it took for S-waves to reach Station B after the earthquake.
A)20 minutes
B)10 minutes
C)30 minutes
D)5 minutes
3
The record produced by a seismometer is called a __________.
A)seismograph
B)seismochart
C)plot
D)seismogram
4
What is the study of earthquakes called?
A)cartography
B)sedimentology
C)geology
D)seismology
5
According to the seismogram shown in the figure, which wave is the fastest?
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A)Tidal wave
B)S-wave
C)Surface wave
D)P-wave
6
What type of instrument can measure the vibrations of an earthquake?
A)seismograph
B)seismometer
C)GPS
D)sonar
7
Why does knowledge of Earth's interior come from seismic waves?
A)They change speed only when they encounter different materials.
B)They change speed and direction when they encounter different materials.
C)They change type when they encounter different materials.
D)They change direction and intensity when they encounter different material.
8
Which wave arrives at a seismic facility first?
A)tidal wave
B)S-wave
C)surface wave
D)P-wave
9
Which waves are called body waves?
A)surface waves and S-waves
B)surface waves only
C)P-waves and surface waves
D)P-waves and S-waves
10
What is Earth's core composed of?
A)iron and nickel
B)hydrogen and iron
C)nickel and silicon
D)magnesium and silicon
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