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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 depth of the earthquake focus
B
the distance to the epicenter
C
the direction to the earthquake
D
the geographic location of the epicenter
2) As the distance from an earthquake epicenter increases, the time between P-wave arrival and S-wave arrival will
A
decrease
B
increase
C
remain the same
D
vary depending on atmospheric conditions
3) What type of earthquake wave is usually received first at a recording station that is 2000 km from the epicenter?
A
P-waves
B
S-waves
C
L-waves
D
Rayleigh waves
4) P-waves
A
arrive after S-waves
B
travel at the same speed as S-waves
C
travel faster than S-waves and can travel through the outer core
D
travel slower than S-waves and cannot travel through the outer core
5) S-waves
A
are the same as P-waves
B
cannot travel through solids
C
vibrate perpendicular to the the direction of travel (or side to side)
D
vibrate parallel to the direction of travel (like pushing and pulling on a spring)
6) The outermost layer of our planet is the
A
inner core
B
outer core
C
mantle
D
crust
7) The thickness of the Earth's crust
A
is 5 to 2900 kilometers
B
is about 5 to 20 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
allow S-waves to travel through them
B
are thought to be mostly composed of iron and nickel
C
are both liquid
D
are both solid
10) S-waves cannot through
A
the mantle
B
the crust
C
solids
D
liquids
*select an answer for all questions
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