Which of the following principles of experimental design ensures that the explanatory variable, and not some variable over which the experimenter has no control, is causing observed changes in the response variable?

How did Greek city-states treat government? A. All city-states used the same form of government. B. All city-states experimented with different forms of government. C. Each city-state had its own form of government.

In the u. s. supreme court case that challenged a louisiana statute requiring rail roads provide separate accommodations for blacks and whites, the court found that the separate but equal accommodations did not violate the equal protection clause of

Africans and Native Americans during the colonial period welcomed European culture and traditions. created new cultures and societies that were a combination of ethnicities. started communities intolerant of outsiders.

Which occurred following the death of Charlemagne's son? I'm guessing it's B but idk A - the empire was taken over by Trojans B - the empire was divided C - the empire became the country of Brazil D - the empire became the country of Uganda

He U. S. Congress refused to ratify the Treaty of Versailles (1919) because

How is organizing the past by theme different from organizing the past by future?

After his father died took over the task of establishing a colony in Texas

How do you think the Northwest Ordinance would affect Native Americans?

Won the state of Georgia change the design of its flag in 1956 many people objective. what can you conclude was the main reason for this objection?

3. The process set forth in the Constitution for charging the president or another federal official with a crime A. Civil Rights Act B. Fourteenth Amendment C. Ku Klux Klan D. Black Codes E. Radical Republicans F. Impeachment