1: You can change the hypothesis if the experiment is not supporting it.
2: They do not use scientific method.
Answer:
I think many free blacks being sold into slavery
Specialization of labors leads towards productivity
Answer:
The election constitutes the first peaceful transfer of power from one political party to another in the United States. By 1800, when he decided to run for president, Thomas Jefferson possessed impressive political credentials and was well-suited to the presidency.