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SCIN 136 Mid Term Exam.docx-Part 1 of 1 - 98.42/
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Page 7
Question 16 of 75
1.33/ 1.33 Points
The Theory of Plate Tectonics
was first proposed by:
A.Issac Hayes
B.Francis Bacon
C.Alfred Wegener
D.Frank Taylor
E.Edward Suess
F.It was created by CNN on a slow news day.
Question 17 of 75
0.0/ 1.33 Points
About 250 million years ago there was a single landmass we call:
Question 18 of 75
1.33/ 1.33 Points
At various times in the Earth's history, North America has been part of which
A.La-La Land/Oz
E.a and c
F.b and d
G.a, b, and c
Question 19 of 75
1.33/ 1.33 Points

Page 8
Among the evidence Wegener used to support his ideas was:
A.similar old mountain ranges on different continents
B.similar fossils older than 150 million years on different continents
C.the fit of continental coastlines
D.all of the above
E.b and c only
F.he'd seen it on a Fox News panel discussion.
Question 20 of 75
1.33/ 1.33 Points
MAJOR force
or mechanism driving plate movements would be:___________________. Thus an
earthquake can occur anywhere on Earth.
A.convection cells in the mantle
B.tidal forces pulling on ocean water
C.rotational forces
D.gravitational forces acting at trenches and ridges due to crustal rock densities
E.a and c
Question 21 of 75
1.33/ 1.33 Points
The site down
INSIDE the Earth
where an earthquake/seismic event begins
is called the:
C.Outer Core
Question 22 of 75
1.33/ 1.33 Points
Spreading rates for plates are on the order of:
A.1 - 10 mm/yr
B.1 - 20 cm/yr

Page 9
C.1 - 10 km/yr
D.20 - 30 cm/yr
E.40 - 50 mm/yr
Question 23 of 75
1.33/ 1.33 Points
Besides paleomagnetism one of the largest sets of
for plate tectonics are:
A.distribution of fossils
B.radioactivity in surface rocks tidal cycles
D.variance of water depths
E.all of the above
Feedback: It is the distribution of both terrestrial and marine fossils
Question 24 of 75
1.33/ 1.33 Points
Japan, the Marinas, Gilbert and other areas near the deep sea trenchs
are called:
A.mid-ocean ridge systems
C.spreading zones
D.rift valeys
E.island arcs
Question 25 of 75
1.33/ 1.33 Points
The scientific justification for burying radioactive waste in the trenches is that:
A.the water is already radioactive
B.the waste will be carried back into the radioactive mantle by plate movement
C.cold sea water neutralizes radioactivity

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