John Tuzo Wilson proposed a theory stating that the Earth's outer layer is made up of _____.

A ) a dozen separate plates
B ) a thin layer of ancient soil
C ) a dozen subduction zones
D ) a dozen spreading centers


A ) a dozen separate plates

Environmental & Atmospheric Sciences

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Although the Appalachian Mountains formed during the Paleozoic Era, the present topographic features are a result of

Cenozoic geologic activity. a. True b. False

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The theory of continental drift was developed using the theory of plate tectonics.?

a. True b. False

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Political unity in the ancient Mediterranean world reached its height in

A) the Fertile Crescent. B) Egypt. C) the Roman Empire. D) Western Europe. E) the Alexandrian Empire.

Environmental & Atmospheric Sciences

Balkanization refers to

A) the creation of nation-states in southeastern Europe. B) the breakdown of a state due to conflicts among ethnicities. C) a small geographic area that cannot successfully be organized into states. D) ethnic cleansing. E) religions splintering into opposing groups.

Environmental & Atmospheric Sciences