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Question

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"?

Answer 1

Sorry, these are all answers that you can find very easily on the internet. They do not involve a lot of interpretation, just a minimal amount of effort on your part.

Hint on the last one - it is black, sold in "barrels," and a lot of it comes from the Mid East, along with the US.