The first comprehensive theory of continental drift was proposed by

Why was the the superficial prosperity in the 1920s

How did the new working class of the industrial revolution differ from the working classes of the earlier, farm based economy?

How did the boston massacre contribute to the writing of the declaration of independence? a. many colonists began to see the british government as a source of protection. b. many colonists began to see the british government as a supporter of free speech. c. many colonists began to oppose the british government's building of forts on the frontier. d. many colonists began to fear the british government's harsh actions toward the colonies.