Some of the goods produced by Chinese tradespeople were traded all over the world. What were the characteristics of silk and porcelain that made them so economically valuable?

Which of the following was the center source of energy during the industrial a revolution

Which statement best describes a contribution of the works of nicolas copernicus and galileo galilei?

Four score and seven years ago our fathers brought forth on this continent a new nation, conceived in liberty, and dedicated to the proposition that all men are created equal. —"the gettysburg address," abraham lincoln which quotation correctly uses an ellipsis to shorten lincoln’s words?