In a study on the effects of caffeine on memory, participants drank a bottle of tasteless water containing 100, 50, or 0 milligrams of caffeine. Neither the researcher who handed out the bottled water nor the study participants knew whether the water contained caffeine or not. This is an example of a study.

The political and economic power of roman catholic church was challenged during the reformation by

Which of the following answer best explains the ideals or principles led to the concept of manifest destiny? a americans wanted the european countries to stay out of the north american continent. b americans felt they had a god-given duty to protect the land of the native americans. c americans thought they had a god-given duty to spread their culture and government. d americans learned about this concept from the native americans tribes had encountered.

Put these events in the correct order #1-4. cause: world war 1 caused heavy casualties and property damage throughout europe. many people barely had enough food to eat or coal to stay warm. what happened next? question 1 options: russia, now led by lenin, became the first communist nation in history. communism soon spread to many small countries near russia, and eventually spread to cuba, china, and vietnam. led by vladimir lenin, a group called the bolshevik party gained the support of the people and overthrew russia’s monarchy, killing czar nicholas ii and his family. russian citizens, who were starving and poor, became angry at the ruling class who held all of the nation’s wealth. (write them in order of which they happened)