by mildred $100 page 5page 10page 11tectonics 1tectonics 2 $200 $300 $400 $500 $100 $200 $300 $400...
TRANSCRIPT
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By Mildred
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Jeopardy
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What kind of boundary exists between the Pacific and
Indian-Australian plates?
A convergent boundary
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What kind of geological feature is usually located where two
oceanic plates converge?
A trench
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The Hawaiian Islands chain was formed as the pacific plate moved
over a.....
Hot Spot
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Along which kind of boundary is new sea floor being added?
A divergent boundary
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A transform boundary
What kind of boundary exists along the California coast?
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At what depth in the earth is the interface between the
asthenosphere and the stiffer mantle?
About 600-700 km
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What is the probable composition of the inner core?
Iron and nickel
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What is the pressure at a depth of 3600 km in the earth?
2 million atmospheres
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DAILY DAILY DOUBLEDOUBLE
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About how thick is the earth's outer core?
About 2200 km
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What is the melting point of the rock at a depth of 1000 km?
4000 - 4100 degrees C
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How long will it take P waves to travel to a seismic station
that is 4000 km from the epicenter?
7 minutes
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It takes S waves 13 minutes to travel from an epicenter to a
seismic station. How long will it take P waves to reach the
same station?
7 minutes 20 seconds
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A seismic station is 7000 km from an epicenter. How long after P waves arrive will S
waves arrive?
8 minutes 40 seconds
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P waves arrive at a seismic station at 1:22:00. S waves from the same earthquake
arrive at 1:26:20. What is the distance from the epicenter to
the seismic station?
2800 km
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The difference in arrival times between P and S waves is 9
minutes. If the P waves arrived at 4:56:00, what time did the
quake occur?
4:46:00
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What term describes the process by which one plate
dives beneath another?
Subduction
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What kind of rock makes up most of the contenents?
Granite
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As distance from a mid-ocean ridge increases, the age of the
sea floor
Increases
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What force causes the plates to drift?
Convection currents in the mantle.
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Where are earthquakes and volcanoes most likely to be
found?
Along plate boundaries
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What kind of rock makes up most of the sea floor?
Basalt
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The study of the magnetic properties of ancient rocks is
called
Paleomagnetism
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Why might a seismic station receive P waves but no S waves from a particular
earthquake?
The S waves could not pass through the liquid outer
core.
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What geographic feature is likely to be found in regions where two continental plates
collide?
A mountain range
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What term describes a region on the earth's surface that
receives neither P nor S waves from a particular earthquake?
A shadow zone