# Dynamic Crust 1: Question Preview (ID: 10141)

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P-waves
a) travel faster than S-waves and can travel through the outer core
b) travel slower than S-waves and cannot travel through the outer core
c) travel at the same speed as S-waves
d) arrive after S-waves

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) Rayleigh waves
d) L-waves

As the distance from an earthquake epicenter increases, the time between P-wave arrival and S-wave arrival will
a) increase
b) decrease
c) remain the same
d) vary depending on atmospheric conditions

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 distance to the epicenter
b) the direction to the earthquake
c) the depth of the earthquake focus
d) the geographic location of the epicenter

S-waves
a) vibrate perpendicular to the the direction of travel (or side to side)
b) vibrate parallel to the direction of travel (like pushing and pulling on a spring)
c) are the same as P-waves
d) cannot travel through solids

The outermost layer of our planet is the
a) crust
b) outer core
c) inner core
d) mantle

The thickness of the Earth's crust
a) is about 5 to 60 kilometers
b) is 5 to 2900 kilometers
c) is the same depth under the mountains and the ocean
d) is about 5 to 20 kilometers

The portion of the Earth that is just below the crust is
a) called the mantle
b) called the outer core
c) called the inner crust
d) called the inner core

The outer and inner core
a) are thought to be mostly composed of iron and nickel
b) are both solid
c) are both liquid
d) allow S-waves to travel through them

S-waves cannot through
a) liquids
b) solids
c) the crust
d) the mantle

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