Whether research is hypothesis-driven or not, scientists may use manipulative or observational experimental methods. in a manipulative experiment, a scientist manipulates one or more variables in the study, specifically the independent variable(s). in an observational experiment, a scientist observes differences that naturally occur. for each of the studies described below, indicate if it is hypothesis driven and whether the scientist is employing observational or manipulative methods.

What did the leaders of the soviet union feel would provide the most protection for their country

Situation #2: imagine that you are a newspaper editor in columbus, oh in 1863. the civil war has been dragging on for more than two years already and shows no signs of ending soon. you are aware that many black males are willing to enlist in the union army but you fear that they may be mistreated and abused by the majority of soldiers on either side in this war. write a one-page letter (double spaced) editorial for tomorrow's edition of the newspaper. the topic is military service in the union army by free african american males. in your editorial, take a clear position for or against having black men join the fight. be sure to give reasons for whatever position you choose to take.

What are the most populous and least areas of russia and why are some areas more heavily populated than others