Earth Science Geology, the Environment, and the Universe

Section 2: Seismic Waves and Earth’s Interior

Self-Check Quizzes-English

1
How did scientists learn that Earth's core is partly liquid?
A)S-waves refracted as they reached the outer core.
B)S-waves intersected with P-waves at the core-mantle boundary.
C)S-waves disappeared when they reached the outer core.
D)S-waves sped up when they entered the outer core.
2
What is the study of earthquakes called?
A)cartography
B)sedimentology
C)geology
D)seismology
3
What type of instrument can measure the vibrations of an earthquake?
A)seismograph
B)seismometer
C)GPS
D)sonar
4
Which wave arrives at a seismic facility first?
A)primary wave
B)secondary wave
C)surface wave
D)longitudinal wave
5
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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