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Dynamic Crust 1
Test Description: Questions on earthquakes, earth's layers, volcanoes, and continental drift.
Instructions: Answer all questions to get your test result.
1) Which of the following can be determined by knowing only the arrival time of both P-and S- waves at a single recording station?
A
the geographic location of the epicenter
B
the direction to the earthquake
C
the depth of the earthquake focus
D
the distance to the epicenter
2) As the distance from an earthquake epicenter increases, the time between P-wave arrival and S-wave arrival will
A
vary depending on atmospheric conditions
B
increase
C
decrease
D
remain the same
3) What type of earthquake wave is usually received first at a recording station that is 2000 km from the epicenter?
A
Rayleigh waves
B
S-waves
C
P-waves
D
L-waves
4) P-waves
A
arrive after S-waves
B
travel at the same speed as S-waves
C
travel slower than S-waves and cannot travel through the outer core
D
travel faster than S-waves and can travel through the outer core
5) S-waves
A
vibrate parallel to the direction of travel (like pushing and pulling on a spring)
B
are the same as P-waves
C
cannot travel through solids
D
vibrate perpendicular to the the direction of travel (or side to side)
6) The outermost layer of our planet is the
A
crust
B
outer core
C
inner core
D
mantle
7) The thickness of the Earth's crust
A
is about 5 to 20 kilometers
B
is 5 to 2900 kilometers
C
is the same depth under the mountains and the ocean
D
is about 5 to 60 kilometers
8) The portion of the Earth that is just below the crust is
A
called the inner core
B
called the mantle
C
called the outer core
D
called the inner crust
9) The outer and inner core
A
are thought to be mostly composed of iron and nickel
B
are both solid
C
allow S-waves to travel through them
D
are both liquid
10) S-waves cannot through
A
the crust
B
solids
C
the mantle
D
liquids
*select an answer for all questions
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