Which southwestern state has led united states in copper
production since the early 1900's?
Explorers from which European country were the first to land along
the St. Lawrence River Valley in North America?
Sand dunes are created by which agent of erosion?
By the early 20th century, which natural resource had become so
valuable that people in the United States began calling it "black
gold"?
2007-03-05
15:51:25
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5 answers
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asked by
Cherry-Bomb
1
in
Education & Reference
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