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Ch 11
Test Description: Plate Tectonics
Instructions: Answer all questions to get your test result.
1) If Wegener could have explained _____________ his theory of continenetal drift might have been moere widely accepted in his day
A
nature abhors a vacuum
B
what forces could move continents
C
what causes the tides
D
how coal forms
2) Sonar contributed to information about the ocean bottom by
A
giving scientists a way to map the botom terrain
B
allowing scientists to detect submarines
3) A ___________ is an underwater mountain range
A
trench
B
rift valley
C
mid ocean ridge
4) A ______ runs through a mid ocean ridge
A
rift valley
B
trench
5) According to the theory of sea floor spreading new sea floor _____________
A
emerges from the mid ocean ridge
B
emerges from the rift valley
C
subsides at the trenches
6) ___________ causes the emergence of a new sea floor
A
polar reversal
B
magma pushing up from asthenosphere
C
basaltic orientation in the trenches
7) Evidence of seafloor spreading includes
A
mineral patterns consistent with moon rocks, radiometric dating of sea floor and midcontinent rocks, magnetic patterns found
B
patterns of sediment layers, radiometric dating of sea floor and midcontinent rocks, tide patterns found on the seafloor
C
patterns of sediment layers, radiometric dating of sea floor and midcontinent rocks, magnetic patterns found on the seafloor
8) The theory of plate tectonics unites the theroy of seafloor spreading and the theory of continental drift
A
true
B
false
9) According the the theory of plate tectonics the lithosphere consists of
A
unbroken solid mass that surrounds the molten interior
B
hot spots that float up from the mantle
C
several rigid plates that float of the astehnosphere
10) Mid ocean ridges, rift valley and trenches are thought to
A
reverse roles in the Southern Hemisphere
B
mark the boundaries between tectonic plates
C
occur in the middle of tectonic plates
D
have no relationship to plate tectonics
*select an answer for all questions
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