Download Con-Seal - Quakes & Tectonics

From RegentsEarth.com
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Ques. #1
The point on the earth’s surface
directly above the focus is called
the............
Epicenter
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Ans.
Ques. #2
What is the minimum number of
seismic stations required to find
the location of an earthquake?
3
Ans.
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Ques. #3
What are the two most important
differences between P waves and
S waves?
P waves are faster
S waves cannot travel through
the liquid outer core.
Ans.
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Ques. #4
Earthquakes on the ocean floor
may generate destructive waves
called..............
Tsunamis
Ans.
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Ques. #5
If a seismic station receives neither
P nor S waves from a particular
earthquake it is probably because
that station is in a..............
Shadow zone
Ans.
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Ques. #6
What is the temperature at the
interface between the mantle and
the outer core?
About 5000°C
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Ques. #7
Which location is
the epicenter of
this earthquake?
Location D
Ans.
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Ques. #8
How far from the epicenter was the seismic
station that recorded this seismogram?
About 1800 km
Ans.
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Ques. #9
What kind of boundary
is shown in the
diagram?
A transform boundary
Ans.
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Ques. #10
What is the pressure at a depth of
5000 km inside the earth?
About 3 million atm.
Ans.
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Ques. #11
P waves arrive at a seismic station at 2:48:00.
S waves from the same earthquake arrive at
the same station at 2:53:40. How far from the
epicenter is the seismic station?
About 4000km
Ans.
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Ques. #12
Explain why a seismic station might
receive P waves but not S waves
from a particular earthquake.
The S waves could not travel through
the liquid outer core to reach the station.
Ans.
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Ques. #13
These seismograms
are all from the same
earthquake but they
were recorded at
different seismic
stations. Which
station was closest to
the epicenter?
Station C. The arrival times of the
P & S waves are closest together.
Ans.
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Ques. #14
What is the density of the earth’s
outer core?
9.9 - 12.1 g/cm3
Ans.
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Ques. #15
How far will P waves travel in 11
minutes 20 seconds?
About 8000 km
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Ans.
Ques. #16
It takes P waves 4 minutes to reach
a seismic station. How long will it
take S waves from the same earthquake to reach the same station?
00:12:40 (12 min. 40 sec.)
Ans.
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Ques. #17
About how many kilometers thick
is the inner core?
About 2300 km
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Ques. #18
A seismic station is 2000km from the
epicenter of an earthquake. P waves
arrive at 2:43:00 PM. At what time will S
waves from that earthquake arrive at the
station?
2:46:20 PM
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Ques. #19
How far from the
epicenter was the
seismic station
that recorded this
seismogram?
2600 km
Ans.
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Ques. #20
How far from the
epicenter was the
seismic station that
recorded this
seismogram?
2200km
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Ques. #21
A seismic station is 6000km from the
epicenter of an earthquake. If S waves
arrived at 4:29:00 AM, at what time did
P waves from the same earthquake
arrive?
4:21:20 AM (7min. 40 sec. before
the S waves arrived)
Ans.
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Ques. #22
In which 2 zones in the earth is the
temperature higher than the melting
point of the rock?
The Asthenosphere (plastic mantle)
and the outer core.
Ans.
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Ques. #23
A seismic station is 5600km from
the epicenter of an earthquake. If P
waves arrive at 5:59:00 PM, what is the
time of origin of the quake (what time
did it occur)?
5:50:00 PM
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Ques. #24
P waves arrive at a seismic station at 1:32:20 AM.
S waves from the same earthquake arrive 8 minutes
and 20 seconds later. At what time did the earthquake occur? (what is it’s time of origin)
1:20:00 AM
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Ques. #25
Which location would not
receive both P and S waves
from this earthquake?
Location D
(S waves absorbed by outer core)
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Ques. #26
State two differences between
continental and oceanic crust.
Continental crust: less dense, thicker, granitic
Oceanic crust: more dense, thinner, basaltic
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Ques. #27
Where do earthquakes and
volcanoes generally occur.
In specific zones (or belts) in the crust.
These correspond to plate boundaries.
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Ques. #28
Which of the following graphs correctly represents the
relationship between earthquakes and volcanoes?
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3
#1
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Ques. #29
P waves arrive at a seismic station
10 minutes before the arrival of S
waves. How far from the epicenter
is the seismic station?
8800 km
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Ques. #30
How many times stronger is a
magnitude 7 earthquake than a
magnitude 3 earthquake?
10,000 times stronger
7 minus 3 = 4 which is really 104 which is 10,000
Ans.
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YOU’RE A
WINNER!
P waves can go through the earth’s
core but S waves cannot.