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Plate Tectonics

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Title: Plate Tectonics


1
Plate Tectonics

By Mildred
2
Jeopardy
Page 5
Page 10
Page 11
Tectonics 1
Tectonics 2
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3
What kind of boundary exists between the Pacific
and Indian-Australian plates?
A convergent boundary
4
What kind of geological feature is usually
located where two oceanic plates converge?
A trench
5
The Hawaiian Islands chain was formed as the
pacific plate moved over a.....
Hot Spot
6
Along which kind of boundary is new sea floor
being added?
A divergent boundary
7
What kind of boundary exists along the California
coast?
A transform boundary
8
At what depth in the earth is the interface
between the asthenosphere and the stiffer mantle?
About 600-700 km
9
What is the probable composition of the inner
core?
Iron and nickel
10
What is the pressure at a depth of 3600 km in the
earth?
2 million atmospheres
11
DAILY DOUBLE
12
About how thick is the earth's outer core?
About 2200 km
13
What is the melting point of the rock at a depth
of 1000 km?
4000 - 4100 degrees C
14
How long will it take P waves to travel to a
seismic station that is 4000 km from the
epicenter?
7 minutes
15
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
16
A seismic station is 7000 km from an epicenter.
How long after P waves arrive will S waves arrive?
8 minutes 40 seconds
17
P waves arrive at a seismic station at 12200. S
waves from the same earthquake arrive at 12620.
What is the distance from the epicenter to the
seismic station?
2800 km
18
The difference in arrival times between P and S
waves is 9 minutes. If the P waves arrived at
45600, what time did the quake occur?
44600
19
What term describes the process by which one
plate dives beneath another?
Subduction
20
What kind of rock makes up most of the contenents?
Granite
21
As distance from a mid-ocean ridge increases, the
age of the sea floor
Increases
22
What force causes the plates to drift?
Convection currents in the mantle.
23
Where are earthquakes and volcanoes most likely
to be found?
Along plate boundaries
24
What kind of rock makes up most of the sea floor?
Basalt
25
The study of the magnetic properties of ancient
rocks is called
Paleomagnetism
26
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.
27
What geographic feature is likely to be found in
regions where two continental plates collide?
A mountain range
28
What term describes a region on the earth's
surface that receives neither P nor S waves from
a particular earthquake?
A shadow zone
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