Answer: African-Americans we’re still treated as if they were still slaves in the American Revolution. For instance, they were placed in the front lines during battle, where there were higher chances of getting killed.
Throughout history, we have made lots of discoveries using energy. Before 1850, wood was our main source of fuel for heating, cooking and producing steam for powering steam engines for the railroads. Other sources of energy were water, wind, coal and some manufactured natural gas.
Answer:
In a system known as the triangular trade, Europeans traded manufactured goods for captured Africans, who were shipped across the Atlantic Ocean to become slaves in the Americas. The Europeans, in turn, were supplied with raw materials.